EMC Symmetrix DMX-3 Product Manual

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EMC

Symmetrix

DMX-3

Product Guide

P/N 300-002-197

REV A09

EMC Corporation

Corporate Headquarters:

Hopkinton, MA 01748

508

435

www.EMC.com

9103

1000

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Page 1 ® Symmetrix ® DMX-3 Product Guide P/N 300-002-197 REV A09 EMC Corporation Corporate Headquarters: Hopkinton, MA 01748 9103 1000 www.EMC.com...
Page 2 Copyright © 2005-2008 EMC Corporation. All rights reserved. Published December, 2008 EMC believes the information in this publication is accurate as of its publication date. The information is subject to change without notice. THE INFORMATION IN THIS PUBLICATION IS PROVIDED “AS IS.” EMC CORPORATION MAKES NO...
Page 3: Table Of Contents
Preface ....................21 Chapter 1 Introducing the Symmetrix DMX-3 Symmetrix DMX-3 ................26 Symmetrix DMX-3 configurations .......... 27 Symmetrix platform and Enginuity operating environment ..29 Enginuity operating environment........... 29 EMC Solutions Enabler APIs ........... 30 Storage capacities and global memory requirements....31 Storage capacities...............
Page 4 Contents Chapter 2 Symmetrix DMX-3 Hardware Major components ................46 Symmetrix DMX-3 and component scaling attributes..50 DMX-3 configuration rules and guidelines ......51 Symmetrix DMX-3 architecture ............53 DMX-3 block diagram............... 53 DMX-3 point-to-point message matrix........55 DMX-3 midplane slot configuration........56 DMX-3 slot configuration............
Page 5 Mainframe serial channel extenders ........97 Open systems Fibre Channel interface connections ..... 98 Chapter 3 Symmetrix DMX-3 Input/Output Operations Symmetrix DMX-3 operation ............102 Symmetrix global memory management ......103 Elements of a Symmetrix I/O operation ........105 I/O response time: Mainframe environment....... 105 I/O response time: Open systems environment ....
Page 6 Benefits of Virtual Provisioning ..........147 Virtual Provisioning features ..........147 Multiport volume access for open systems environments ..149 Software options overview............150 EMC ControlCenter family of products....... 150 Symmetrix Optimizer ............. 153 TimeFinder family of products..........154 Solutions Enabler..............155 Symmetrix Management Console .........
Page 7 Access control and user authorization........183 Symmetrix Audit Log.............. 185 RSA enVision log security ............185 EMC Certified Data Erasure for Symmetrix Disks ..... 186 IPsec security features ............. 187 Data protection guidelines............. 189 Disk mirroring (RAID 1) concepts ..........191 Advantages of mirroring ............
Page 8 SRDF/A resiliency features ........... 222 Chapter 6 Mainframe Features and Support Introduction..................226 Supported mainframe features ............. 227 EMC z/OS Storage Manager ..........227 Dynamic Channel Management..........228 Dynamic Path Reconnection ..........228 Concurrent Copy ..............228 Compatible Native Flash for Mainframe ......229 Multi-Path Lock Facility/Concurrent Access......
Page 9 271 International power specifications ........274 International extension cords and mating connectors ............274 Appendix B Power Sequences Vaulting..................... 278 Routinely powering up the Symmetrix DMX-3 ......279 Powering down the Symmetrix DMX-3 ........281 EMC Symmetrix DMX-3 Product Guide...
Page 10 System placement options............. 293 Overhead host cable routing..........294 Overhead power cable routing..........294 Floor load-bearing requirements........... 295 Symmetrix DMX-3 configuration floor cutouts ....297 Planning host connectivity ............298 Open systems installations............301 Symmetrix hardware checklist ..........301 Host checklist ................302 Available EMC Fibre Channel cables........
Page 11 Enginuity and the storage platform relationships........29 DMX-3 Silencer ....................41 Symmetrix DMX-3 system bay (interior view, front and rear)....47 Symmetrix DMX-3 storage bay (interior view, front and rear) ....49 Symmetrix DMX-3 block diagram ..............54 Symmetrix DMX-3 message fabric ............... 56 Symmetrix DMX-3 card cage configurations (front)........
Page 12 IEA480E service alert error message format (mirror-2 resynchronization)............... 247 z/OS IEA480E service alert error message format (mirror-1 resynchronization)............... 248 Typical console error message ..............251 Power connections ..................270 EMC model number DMX3-PCBL3DHR cable description ....272 EMC Symmetrix DMX-3 Product Guide...
Page 13 EMC model number DMX3-PCBL3YAG cable description....275 System bay and storage bay wiring with flying leads (WYE) ....276 Symmetrix DMX-3 system bay and storage bay power switches ..280 DMX-3 system bay and storage bay to customer PDU power cabling ..................288 DMX-3 power cabling requirement ............
Page 14 Figures EMC Symmetrix DMX-3 Product Guide...
Page 15 IBM controller/DASD compatibility............. 61 Symmetrix DMX-3 disk drive features ............63 Symmetrix DMX-3 disk drive capacities ............. 65 Logical volumes supported on Symmetrix DMX-3 disk drives ....66 Logical volumes supported for DMX-3 systems ......... 67 IBM DASD emulation characteristics............72 Supported protocols and Symmetrix DMX-3 channel directors ....
Page 16 EMC Fibre cables - Fibre Channel connect..........304 GigE/iSCSI channel cables ................305 Symmetrix checklist for mainframe hosts ..........306 ESCON channel cables .................. 307 EMC Fibre cables - FICON 9 micron connect ..........308 EMC Symmetrix DMX-3 Product Guide...
Page 17: Warnings And Cautions
The following warnings and cautions pertain throughout this guide: WARNING Trained service personnel only. This EMC product has more than one power supply cord. To reduce the risk of electric shock, disconnect all power supply cords before servicing. Ground circuit continuity is vital for safe operation of the machine.
Page 18 This product operates at high voltages. To protect against physical harm, power off the system whenever possible while servicing. WARNING In case of fire or other emergency involving the EMC product, isolate the product’s power and alert appropriate personnel. CAUTION Trained personnel are advised to exercise great care at all times when working on the EMC hardware.
Page 19 Warnings and Cautions Static precautions EMC incorporates state-of-the-art technology in its designs, including the use of LSI and VLSI components. These chips are very susceptible to damage caused by static discharge and need to be handled accordingly. CAUTION Before handling printed circuit boards or other parts containing LSI or VLSI components, observe the following precautions: Store all printed circuit boards in antistatic bags.
Page 20 Warnings and Cautions EMC Symmetrix DMX-3 Product Guide...
Page 21: Preface
For the most up-to-date information on Symmetrix and Enginuity, refer to the “Symmetrix DMX-3, DMX-4 EMC Enginuity Release Notes”, located on EMC Powerlink. If your Symmetrix DMX-3 does not function properly or does not function as described in this document, please contact your EMC representative. Audience...
Page 22 This product guide contains no DANGER messages. Typographical conventions EMC uses the following type style conventions in this document: Normal Used in running (nonprocedural) text for: • Names of interface elements (such as names of windows, dialog boxes, buttons, fields, and menus) •...
Page 23 Technical support — For technical support, go to EMC Customer Service on Powerlink. To open a service request through Powerlink, you must have a valid support agreement. Please contact your EMC sales representative for details about obtaining a valid support agreement or to answer any questions about your account.
Page 24 Preface Your comments Your suggestions will help us continue to improve the accuracy, organization, and overall quality of the user publications. Please send your opinion of this document to: techpubscomments@eng.EMC.com EMC Symmetrix DMX-3 Product Guide...
Page 25: Introducing The Symmetrix Dmx-3
Invisible Body Tag Introducing the Symmetrix DMX-3 This chapter provides an overview of the Symmetrix DMX-3 and highlights the performance, availability and serviceability features, and hardware and software options: Symmetrix DMX-3 ................26 Symmetrix platform and Enginuity operating environment ..29 Storage capacities and global memory requirements....
Page 26: Symmetrix Dmx-3
96 to 1,920 2 Gb/s high-performance Fibre Channel disk drives, providing a maximum raw capacity of approximately 1 PB. Note: For information on 2,400 drive support, contact your EMC Sales Representative. To support the massive scalability of DMX-3 configurations, the DMX...
Page 27: Symmetrix Dmx-3 Configurations
Figure 1 on page 27 provides a front view of the exterior of a Symmetrix DMX-3 configured with one system bay and eight storage bays. Figure 2 on page 28 provides a front view of the exterior of a Symmetrix DMX-3 configured with one system bay and four storage bays.
Page 28: Symmetrix Dmx-3 Five-Bay Configuration
Introducing the Symmetrix DMX-3 Symmetrix DMX-3 five-bay configuration Figure 2 Symmetrix DMX-3 two-bay configuration Figure 3 EMC Symmetrix DMX-3 Product Guide...
Page 29: Symmetrix Platform And Enginuity Operating Environment
Symmetrix DMX system storage platform, which consists of the following: Symmetrix DMX hardware Enginuity-based operating functions EMC Solutions Enabler Application Program Interfaces (APIs) Symmetrix-based applications Host-based Symmetrix applications Independent Software Vendor (ISV) applications Figure 4 on page 29 illustrates the relationships among these software layers (and Symmetrix hardware).
Page 30: Emc Solutions Enabler Apis
They enable the creation of storage management applications that don’t have to understand the management details of each piece within the total storage environment. ® Note: Contact your local EMC Sales Representative or the EMC Powerlink website at: for more information on EMC http://Powerlink.EMC.com...
Page 31: Storage Capacities And Global Memory Requirements
This section describes the Symmetrix DMX-3 storage capacities and global memory requirements. Storage capacities The Symmetrix DMX-3 offers 73 GB, 146 GB, 300 GB, 450 GB, and 500 GB disk drives and can be configured with from 96 to 1,920 disk drives.
Page 32: Global Memory Requirements
16 GB to 512 GB (256 GB effective). The total global memory requirement for a Symmetrix DMX-3 is based upon specific system configurations and customer requirements. Besides the customer’s applications, other variables that affect the amount of...
Page 33: Performance Features
• “Symmetrix FICON configurations” on page 94 • FICON Cascading and Open Systems Intermix Configurations Logical volume capacities • “Symmetrix DMX-3 logical volume capacities” on page 66 Hypervolume Extension option • “Open systems hypervolumes” on page 127 • “Mainframe systems hypervolumes” on page 132 Tiered storage optimization •...
Page 34 Dynamic Parallel Access Volumes • “Dynamic Parallel Access Volumes” on page 231 PPRC Command Support • “IBM MetroMirror (PPRC)” on page 235 a. Contact your local EMC Sales Representative for currently supported host channel connectivity. EMC Symmetrix DMX-3 Product Guide...
Page 35: Availability And Integrity Features
Introducing the Symmetrix DMX-3 Availability and integrity features The Symmetrix DMX-3 includes key enhancements that improve the reliability, availability, and serviceability. Table 3 on page 35 highlights many of the Symmetrix DMX-3 availability and integrity features. Availability and integrity features roadmap (1 of 2)
Page 36 “Base SRDF family products” on page 221 • “SRDF family options” on page 222 • Nondisruptive component replacement • “Nondisruptive component replacement” on page 172 • Nondisruptive change or remove drives • “Nondisruptively change or remove FBA devices” on page 174 EMC Symmetrix DMX-3 Product Guide...
Page 37: Serviceability Features
Introducing the Symmetrix DMX-3 Serviceability features Each Symmetrix DMX-3 has an integrated service processor that continuously monitors the Symmetrix environment. The service processor communicates with the EMC Customer Support Center through a customer-supplied direct phone line. The service processor automatically dials the Customer Support Center whenever the Symmetrix system detects a component failure or environmental violation.
Page 38: Supported Software Applications
Enginuity is what enables simultaneous connection to virtually all mainframe, UNIX, Windows, iSeries, and Linux platforms—and all validated in EMC’s interoperability labs. The result: you can do whatever you want with your information. Centralize it. Re-purpose it. Consolidate it. Replicate it. Share it. Distribute and manage it. Put it to work where it’s relevant, anytime without compromise.
Page 39: Storage Management
“EMC ControlCenter family of products” on page 150 for related information. Symmetrix local The EMC TimeFinder and SRDF families of software are the most and remote powerful suites of local and remote storage replication solutions replication software available in the industry; enabling business continuance volumes for...
Page 40: Information Mobility
EMC Open Migrator/LM — Provides host-based, nondisruptive data migration/data mobility at the volume level for Microsoft Windows and UNIX servers. EMC Open Replicator for Symmetrix — Enables remote point-in-time copies to be used for high-speed data mobility, remote vaulting, migrations, and distribution between EMC Symmetrix DMX and qualified storage systems with full or incremental copy capabilities.
Page 41: Hardware Options
The Symmetrix DMX-3 Silencer as shown in Figure 5 on page 41 is a fan noise reduction option for the Symmetrix DMX-3 system bay and storage bay systems. The Symmetrix DMX-3 Silencer is designed with leading edge sound reducing materials that attenuate high-frequency noise components and reduce overall sound levels.
Page 42: Silencer Specifications
DMX-3 Silencer for top of system bay and or storage bay Full length foam piece for the storage bay An 11-in. by 20-in. foam piece for the system bay Note: Contact your EMC Sales Representative for Silencer kit information and current availability. DMX-3 Silencer...
Page 43: Systems Securing Kits
Symmetrix DMX-3 systems securing kits can be installed to system and storage bays without lifting the bays. Note: Please refer to the EMC Symmetrix DMX-3 Physical Planning Guide for information regarding the EMC securing kits, or contact your EMC Sales Representative for specific information.
Page 44 Introducing the Symmetrix DMX-3 EMC Symmetrix DMX-3 Product Guide...
Page 45 Symmetrix channel connectivity and host integration....59 Fibre Channel disk subsystem ............62 Channel, disk, and global memory directors......... 75 Symmetrix DMX-3 power subsystems ........... 86 DMX-3 communications and environmental control ....89 Channel attachments ................. 92 Symmetrix DMX-3 Hardware...
Page 46: Major Components
Symmetrix DMX-3 Hardware Major components The Symmetrix DMX-3 is a disk array subsystem that is composed of a system bay and from one to eight storage bays. This section describes the Symmetrix DMX-3 components. Symmetrix DMX-3 model component overview Table 6...
Page 47: Symmetrix Dmx-3 Hardware
* The service processor consists of the KVM and the server. SYM-000978 ** The battery backup unit assembly consists of two battery backup unit modules. Symmetrix DMX-3 system bay (interior view, front and rear) Figure 6 Major components...
Page 48: Symmetrix Dmx-3 System Bay Component Overview
Ethernet interface. The service processor uses an external modem for communicating and mouse - KVM), server, with the EMC Customer Support Center when the Symmetrix system detects an error condition. and uninterruptible power The service processor is used to download the Symmetrix system configuration to the directors and supply (UPS) provides diagnostic and maintenance utilities for the Symmetrix system.
Page 49: Symmetrix Dmx-3 Storage Bay (Interior View, Front And Rear)
(PDUs) Drive enclosure covers Link control cards (LCCs) Power distribution panels (PDPs) BBU assembly cover Power zone B Power zone A left side right side SYM-000977 Symmetrix DMX-3 storage bay (interior view, front and rear) Figure 7 Major components...
Page 50: Symmetrix Dmx-3 And Component Scaling Attributes
Component Description Drive enclosures The Symmetrix DMX-3 storage bay is configured with capacities of 120 or 240 disk drives. Each drive enclosure includes the following components: • Redundant power and cooling modules for disk drives • Two Link Control Cards (LCC) •...
Page 51: Configuration Rules And Guidelines
Symmetrix DMX-3 Hardware Table 9 DMX-3 configurations Number of disk directors 2 disk directors 4 disk directors 6 disk directors 8 disk directors Drive channels Minimum and maximum number of disk drives 96–240 192–960 360–1,440 480–1,920 Minimum and maximum TB capacity (raw) 7.04–119.90...
Page 52 Symmetrix DMX-3 Hardware While all drives (different capacities or different speeds) can be intermixed in Symmetrix DMX-3 systems, locations on disk director pairs and drive loops may affect application performance. Consult your Symmetrix representative for guidelines on optimal configuration of mixed drive sizes and speeds.
Page 53: Symmetrix Dmx-3 Architecture
“DMX-3 point-to-point message matrix” on page 55 “DMX-3 slot configuration” on page 57 DMX-3 block In a fully configured Symmetrix DMX-3, each of the eight director diagram ports on the sixteen directors connects to one of the 16 memory ports on each of the eight global memory directors.
Page 54: Symmetrix Dmx-3 Block Diagram
Symmetrix DMX-3 Hardware Symmetrix DMX-3 block diagram Figure 8 EMC Symmetrix DMX-3 Product Guide...
Page 55: Point-To-Point Message Matrix
Symmetrix DMX-3 Hardware DMX-3 Symmetrix DMX systems feature a point-to-point interconnect point-to-point technology for its separate matrix fabrics, which have been message matrix implemented for both data plane functions and control plane functions. This Symmetrix DMX message matrix provides high bandwidth and low latency control plane communication, which manages the data movement through the Symmetrix system.
Page 56: Midplane Slot Configuration
Director Symmetrix DMX-3 message fabric Figure 9 DMX-3 midplane The front of the Symmetrix DMX-3 card cage midplane contains the slot configuration channel directors, disk directors, and global memory directors. The rear card cage midplane contains the adapters, and the Communications and Environmental Control Module (XCM) pair.
Page 57: Slot Configuration
Termination of TTL and GTLP signals occurs at the adapters in the end slot locations. DMX-3 slot The Symmetrix DMX-3 midplane provides eight slots in the center of configuration the midplane reserved for global memory directors and the remaining 16 slots are reserved for channel directors and disk directors (eight to the left and eight to the right of memory).
Page 58: Symmetrix Dmx-3 Card Cage Configurations (Rear)
Type Type Type Type Type *Note: These slots (Adapters 12, 11, 6, and 5) in the midplane can be configured with either front-end or back-end apapters. SYM-000078 Symmetrix DMX-3 card cage configurations (rear) Figure 11 EMC Symmetrix DMX-3 Product Guide...
Page 59: Symmetrix Channel Connectivity And Host Integration
Symmetrix systems support through Fibre Channel, iSCSI, ESCON, FICON, or GigE (SRDF) interfaces. Note: For the most current information on Symmetrix systems and specific host integration, contact your local EMC Sales Representative, or refer to the EMC Powerlink website. Channel...
Page 60: Symmetrix Channel Configurations
Channel interfaces open systems and iSeries hosts that have Fibre Channel connectivity. Note: Consult your local EMC Sales Representative for the most current list of supported hosts, models, operating systems, and EMC open systems host support policies, or refer to the EMC Powerlink website.
Page 61: Supported Mainframe Operating Systems
3390-1 3390-2 3390-3 3390-9 3390-27 3390-54 a. Contact your local EMC Sales Representative for information on 3380 support. Supported In IBM/PCM mainframe environments, the Symmetrix DMX system mainframe is operating-system independent. The memory processing algorithms operating systems are self-managed, and the Symmetrix system does not depend on host cache commands to benefit from read and write caching.
Page 62: Fibre Channel Disk Subsystem
Symmetrix DMX-3 Hardware Fibre Channel disk subsystem The Symmetrix DMX-3 disk subsystem are contained in the storage bays. They are fully redundant components and can be replaced nondisruptively. The disk subsystems consist of the following components: Disk drives — One-inch low-profile 2 Gb/s Fibre Channel disk drives available in 73 GB, 146 GB, 300 GB, 450 GB, and 500 GB sizes.
Page 63: Link Control Cards (Lcc)
32 MB 16 MB 32 MB buffer a. Contact your EMC Sales Representative for the latest drive specifications. b. These specifications are subject to change. Link control cards The link control card’s main function is to provide services to the...
Page 64: Symmetrix Dmx Disk Drive Capacities
Each DMX-3 system requires a minimum of two global spare drives and one additional global spare drive for every 100 disk drives or a portion thereof. For example, a DMX-3 with 547 disk drives requires 2 + 6= 8 global spare drives. EMC Symmetrix DMX-3 Product Guide...
Page 65: Symmetrix Dmx-3 Disk Drive Capacities
85,189 170,379 348,150 522,225 580,251 emulation) 72.82 GB 145.66 GB 292.46 GB 438.702 GB Formatted capacity (iSeries emulation) a. Contact your local EMC Sales Representative for information on 3380 emulations, disk drives, and data protection methods. Fibre Channel disk subsystem...
Page 66: Symmetrix Dmx-3 Logical Volume Capacities
Logical volumes per disk drive with RAID 6 (6+2) Protection Logical volumes per disk drive with RAID 6 (14+2) Protection Logical volumes per disk drive with RAID 10 Protection (mainframe data volumes only) a. For information on Symmetrix DMX-3 data protection options, refer to Table 28 on page 189.
Page 67: Logical Volumes Supported For Dmx-3 Systems
Symmetrix DMX-3 Hardware Table 14 Logical volumes supported for DMX-3 systems Maximum number Number of DA Data protection Maximum logical volumes per system of disk drives boards 1,920 SRDF 64,000 1,920 RAID 1 64,000 1,920 RAID 5 (3+1) 64,000 1,920...
Page 68: Configuration Rules For Vault Devices
Symmetrix disk drives emulate IBM CKD DASD. Note: The Symmetrix Enterprise Storage Platform (ESP) software enabler, a software option, is required if you plan to store and access mainframe and open systems data on the same Symmetrix system. EMC Symmetrix DMX-3 Product Guide...
Page 69: Deleting (And Then Adding) Devices Online
Symmetrix DMX-3 Hardware Deleting (and then Enginuity supports removing and then adding devices online, which adding) devices facilitates the following configuration enhancements: online Change Device Emulation Online — Remove a CKD volume and add an FBA volume. Convert between mirrored and RAID protected volumes.
Page 70 DMX-3 or DMX-4 and older Symmetrix systems. When (for Sun Solaris hosts) the Symmetrix DMX-3 was introduced, the disk geometry presented to the host by the disk array changed. The number of sectors per track was doubled to 128, which also led to a doubling of the cylinder size.
Page 71: Ibm Ckd Dasd Disk Emulation
Enginuity that allows alternate disk geometry to be presented on a device by device basis. Note: Contact your EMC Customer Engineer to determine if this feature should be enabled on your Symmetrix DMX system. IBM CKD DASD disk...
Page 72: Ibm Dasd Emulation Characteristics
1,891 47,476 712,140 2,655 a. Contact your local EMC Sales Representative for currently supported IBM Controller/DASD emulation modes and 3380 support. Mixed track You can configure a Symmetrix DMX system with both 3380 and 3390 geometries track geometries on the same disk device (3380 and 3390 devices cannot be defined in the same SSID or LCU).
Page 73: Track Format For 3390 Dasd
Symmetrix DMX-3 Hardware Index Index marker marker Magnetic disk Track format for 3390 DASD Figure 12 Track format All tracks are written with formatted records. The start and end of each track are defined by the index marker. Each track has the same...
Page 74 (for error correction), and the gaps for one data record. For 3390 emulations, the track capacity is 56,664 bytes. For 3380 emulations, the track capacity is 47,476 bytes. EMC Symmetrix DMX-3 Product Guide...
Page 75: Channel, Disk, And Global Memory Directors
Symmetrix system. Contact your local EMC Sales Representative for currently supported host connectivity. The Symmetrix DMX-3 supports open systems hosts such as UNIX systems, Linux systems, and Windows connectivity through Symmetrix Fibre Channel or iSCSI directors. (iSeries connectivity is only supported through Fibre Channel directors.) The Symmetrix...
Page 76: Channel Director Descriptions
1-8 per ESCON Channel Director ESCON remote replication ports 1-4 per ESCON Channel Director a. Contact your local EMC Sales Representative for ESCON channel director and GigE Remote support availability. b. Usable ports are per qualified channel directors. Channel director...
Page 77: Fibre Channel Directors (Front-End)
DMX3-60100BS 7-port MPCD (6 FC MM ports/ 1 GigE IPv4/v6 (IPsec capable) MM port) a. Contact your local EMC Sales Representative for currently supported host channel directors and GigE remote directors. b. MM = multimode. SM = single-mode. c. MPCD = Multiprotocol Channel Director.
Page 78: Fibre Channel Adapters (Front-End)
Fibre Channel front-end director For information on Fibre Channel host attachments, go to the EMC Powerlink website. The Symmetrix DMX-3 can support up to eight qualified Fibre Channel directors. Contact your local EMC Sales Representative for specific supported configurations. Fibre Channel...
Page 79: Escon Channel Directors
64,000 base devices (physical devices) with up to 255 aliases (logical devices) Maximum concurrent I/O host connections per Symmetrix DMX system a. The maximum concurrent I/O connections is based on 10 ESCON directors. Contact your local EMC Sales Representative for specific supported configurations.
Page 80: Multiprotocol Channel Directors
The Symmetrix DMX FICON design auto-detects 4 Gb/s, 2 Gb/s or 1 GB/s at switch or channel port login time. The Symmetrix DMX-3 system may support up to eight FICON channel directors. Table 20 on page 81 describes the FICON channel director configurations supported in the DMX-3.
Page 81: Gigabit Ethernet (Gige) Remote Directors
Maximum DMX channel addresses per Symmetrix system, base and alias 64,000 Maximum I/O host connections per Symmetrix DMX system a. The maximum I/O connections are based on 8 FICON directors for the DMX-3. Contact your local EMC Sales Representative for specific supported configurations. Gigabit Ethernet...
Page 82: Gige Ipv4/V6 (Ipsec Capable) Director
“IPsec security features” on page 187 contains additional information on IPsec. iSCSI channel The Symmetrix DMX-3 MPCD, through mezzanine card technology, directors supports iSCSI channel connectivity by way of Gigabit Ethernet (GigE) hardware for the Symmetrix DMX systems. The iSCSI channel...
Page 83: Fibre Channel Disk Directors (Back-End)
The Fibre Channel disk director has eight multiplex processors that support one port each on its back adapter. The Symmetrix DMX-3 is available with two, four, six, or eight disk directors, supporting Fibre Channel loops ranging from 15 drives to 60 drives per loop.
Page 84: Global Memory Director To Channel And Disk Director Matrix
Global memory director to channel and disk director matrix Figure 13 The DMX architecture ensures highest performance due to the following: Requests for global memory are expedited to reduce locking. Requests are intelligently arbitrated to optimize available resource usage. EMC Symmetrix DMX-3 Product Guide...
Page 85: Global Memory Director Configuration
When configuring global memory for the Symmetrix DMX systems follow these guidelines: Very large eight disk director configurations may be limited or restricted by currently available Symmetrix DMX-3 maximum memory. Global memory directors can be added to the DMX-3 not to exceed the maximum designed for the system’s configuration.
Page 86: Symmetrix Dmx-3 Power Subsystems
Symmetrix DMX-3 Hardware Symmetrix DMX-3 power subsystems The Symmetrix DMX-3 power subsystem uses a 2N power architecture.The Symmetrix DMX-3 power subsystem includes the following features in the system bay and storage bay: 2N power zones Dual-line cords, one for each zone per bay, providing on/off...
Page 87: Storage Bay Power Subsystem Components
270, and “Symmetrix DMX-3 power requirements” on page 288 contain more detailed information on the Symmetrix DMX-3 power requirements. The EMC Symmetrix DMX-3 Physical Planning Guide available on the EMC Powerlink website provides additional information. Symmetrix DMX-3 power subsystems...
Page 88: Symmetrix Dmx-3 System Bay And Storage Bay To Customer Pdu Power Cabling
Customer’s power Customer’s power Customer’s power distribution unit distribution unit distribution unit distribution unit number B number A number B number A Symmetrix DMX-3 system bay and storage bay to Figure 14 customer PDU power cabling EMC Symmetrix DMX-3 Product Guide...
Page 89: Dmx-3 Communications And Environmental Control
These commands can be issued from the service processor or remotely, by the EMC Customer Support Center, providing a rich set of intelligent serviceability functions. Also within the XCM is the top-level fabric for the message matrix communications system.
Page 90: Environmental Control Functions
The AC power main is checked for: AC failures Transfer to auxiliary DC failures Current sharing between DC supplies DC output voltage Specific notification of overvoltage condition Current from each DC supply EMC Symmetrix DMX-3 Product Guide...
Page 91: Xcm Environmental Control Functionality
Symmetrix DMX-3 Hardware Voltage drops across major connectors Ailing components can be detected and replaced before a failure occurs. Directors (16) Fans (9) Memory boards (8) BBU modules (4, 6, or 8) Power supplies (4, 6, or 8) Inter - XCM comm.
Page 92: Channel Attachments
(ESCON or FICON channels) and open systems hosts (Fibre Channels, iSCSI, or GigE SRDF) connect to the same Symmetrix system. Consult your local EMC Sales Representative for the most current list of supported hosts, models, operating systems, and EMC open systems host support policies, or refer to the EMC Powerlink website.
Page 93: Ficon Channel Attachments
Symmetrix DMX-3 Hardware Symmetrix FICON FICON director Symmetrix FICON FICON director FICON Symmetrix SM or MM director SM or MM FICON FICON director SM or MM Symmetrix FICON director FICON FICON Symmetrix director director SM or MM SM or MM...
Page 94 These switches can also be Cascaded to further enhance connectivity and remote backup and recovery. The EMC and IBM branded McDATA and INRANGE switches are supported. To support Open Systems Intermix, each vendor requires specific models, hardware and software features, configuration settings, and restrictions.
Page 95: Escon Channel Interface Connections
Symmetrix DMX-3 Hardware ESCON channel The Symmetrix DMX-3 ESCON directors connect to mainframe hosts. interface The eight-port, four-processor ESCON director provides the connections capability for four concurrent operations through its four physical interfaces for communicating with the serial channels in host systems.
Page 96: Escon Channel Attachments
20 km 20 km 3 km director Processor or LPAR ESCON links FICON bridge card Symmetrix FICON link ESCON director FICON LX Symmetrix ESCON <= 3 km director 9032-5 ESCD Figure 18 ESCON channel attachments EMC Symmetrix DMX-3 Product Guide...
Page 97: Mainframe Serial Channel Extenders
Symmetrix DMX-3 Hardware Table 22 Symmetrix ESCON cable distances Cable type Cable description Maximum distance Direct fiber, multimode 50 micron 2 km (1.24 miles) per cable segment 62.5 micron 3 km (1.86 miles) per cable segment Fiber repeaters/converters (for example, 9 micron 30 km (18.64 miles) per cable segment...
Page 98: Open Systems Fibre Channel Interface Connections
Maximum distance 9 micron, 1 Gb/s 10 km (6.2 miles) per cable segment 9 micron, 2 Gb/s 10 km (6.2 miles) per cable segment Single-mode 9 micron, 4 Gb/s 10 km (6.2 miles) per cable segment EMC Symmetrix DMX-3 Product Guide...
Page 99 62.5 micron, 2 Gb/s 150 m (492 ft) per cable segment 62.5 micron,4 Gb/s 70 m (230 ft) per cable segment a. Distances are point-to-point. Note: For more information on Fibre Channel attachments and cables, refer to the EMC Powerlink website. Channel attachments...
Page 100 Symmetrix DMX-3 Hardware EMC Symmetrix DMX-3 Product Guide...
Page 101: Symmetrix Dmx-3 Input/Output Operations
Symmetrix DMX-3 Input/Output Operations This chapter describes input and output operations between the Symmetrix DMX-3 system and a host system: Symmetrix DMX-3 operation ............102 Elements of a Symmetrix I/O operation ........105 I/O performance enhancements............ 113 Symmetrix DMX-3 Input/Output Operations...
Page 102: Symmetrix Dmx-3 Operation
Symmetrix DMX-3 Input/Output Operations Symmetrix DMX-3 operation Intelligent global memory configurations allow Symmetrix DMX-3 disk systems to transfer data at electronic memory speeds that are much faster than physical disk speeds. Symmetrix systems are based on the principle that the working set of data at any given time is relatively small when compared to the total subsystem storage capacity.
Page 103: Symmetrix Global Memory Management
Symmetrix DMX-3 Input/Output Operations Symmetrix global The Symmetrix DMX-3 uses the same memory principle as host memory systems, but with enhanced caching techniques in global memory. management Figure 20 on page 103 illustrates global memory use in Symmetrix systems. Directory...
Page 104 I/O events. Enginuity’s algorithms are the most sophisticated and advanced in the industry and are optimized for what you need next. They can adjust for real-world situations and intelligently choose the method that works best for a given situation. EMC Symmetrix DMX-3 Product Guide...
Page 105: Elements Of A Symmetrix I/O Operation
Symmetrix DMX-3 Input/Output Operations Elements of a Symmetrix I/O operation All I/O operations require a certain response time. An I/O request begins when the application issues an I/O command and ends when the data transfer completes. The time interval from I/O request to transfer completion is the I/O response time.
Page 106: I/O Response Time: Open Systems Environment
If the requested data is in global memory, the channel director transfers this data immediately to the channel with a channel end and device end (or a SCSI good ending status). EMC Symmetrix DMX-3 Product Guide...
Page 107: Symmetrix I/O Operations
Symmetrix DMX-3 Input/Output Operations If the requested data is not in global memory, the disk director transfers the data from the disk drive to the global memory, and the channel director transfers the requested data from the global memory to the channel.
Page 108: Read Operations
Since the data is in global memory, there are no mechanical delays due to seek and latency Figure 25 on page 108. Connect time Overhead Total service time Figure 25 Read hit EMC Symmetrix DMX-3 Product Guide...
Page 109: Read Miss
Symmetrix DMX-3 Input/Output Operations Read miss In a read miss operation shown in Figure 24 on page 108, the requested data is not in global memory and must be retrieved from a disk drive. While the channel director creates space in the global memory, the disk director reads the data from the disk drive.
Page 110: Write Operations
Fast write also allows Symmetrix systems to accommodate bursts of writes at a speed above and beyond the speed that the hard drives allow. The negative effects of bursty writes are minimized through this algorithm. EMC Symmetrix DMX-3 Product Guide...
Page 111: Fast Write
Symmetrix DMX-3 Input/Output Operations Because Symmetrix systems write the data directly to global memory and not to disk, there are no mechanical delays due to seek, latency, and RPS miss depicted in Figure 28 on page 111. Connect time Global memory...
Page 112: Write Destaging Operation
Write Pending Indicators (WPIs) already discussed above. This dynamically adjusting algorithm saves disk seek and latency time by destaging data in groups of up to four tracks concurrently per logical volume. EMC Symmetrix DMX-3 Product Guide...
Page 113: I/O Performance Enhancements
Symmetrix DMX-3 Input/Output Operations I/O performance enhancements Symmetrix systems use these techniques to enhance performance: Split director functions — The director operations are split into two functional parts, the channel director and disk director. The channel director services requests from the host.
Page 114 Symmetrix DMX-3 Input/Output Operations EMC Symmetrix DMX-3 Product Guide...
Page 115: Performance And Optimization
Invisible Body Tag Performance and Optimization This chapter describes the performance features of the Symmetrix DMX-3 and explains how to optimize the following features: Overview ................... 116 Global memory performance features .......... 117 Symmetrix file system performance features ......122 Multiple channel directors..............
Page 116: Overview
Symmetrix components, save valuable resources, and optimize data layout based on detection of long-term workload patterns. The Symmetrix DMX-3 offers improved performance over conventional storage control units and DASD designs. The Symmetrix features described in this section allow high global memory hit ratios and less processing overhead, thus reducing response time and improving throughput.
Page 117: Global Memory Performance Features
Performance and Optimization Global memory performance features The Symmetrix DMX-3 global memory director design provides point-to-point, nonblocking connectivity between the front-end channel directors and back-end disk director. Each global memory director is physically partitioned into four separately addressable simultaneously accessible regions. These offload engines, utilizing...
Page 118: Global Memory Asics
In a Symmetrix DMX-3 with eight global memory directors, there are 32 separately addressable and accessible global memory regions. The DMX-3 with four global memory directors supports 16 separately addressable and accessible global memory regions.
Page 119: Tag Based Caching (Tbc)
Performance and Optimization For example, for an instruction requesting to write 256 memory words of data to a given address, the global memory director will break out this request into four bursts: The first 64-word chunk (from 1 to 64) is written to region 1. The second chunk (from 65 to 128) is written to region 2.
Page 120: Fast Write Capabilities
I/Os a disk can do. Whenever (RPO) multiple I/O requests are queued on the disk, the EMC Enginuity Operating Environment can optimize the order in which the I/Os are executed. The RPO optimization reorders the I/Os based on their physical location on the drive.
Page 121: Permacache Option
PermaCache. To determine the minimum memory requirement for your Symmetrix configuration, consult your local EMC Sales Representative. Power failures If a power failure occurs, records that have been updated in PermaCache will be destaged to disk.
Page 122: Symmetrix File System Performance Features
(busy) and cold (idle) spindles. This thermographical information gathered over a long time period and preserved in SFS, is used to determine the hottest (busiest) and the coldest (idlest) spindles and to recommend swaps. EMC Symmetrix DMX-3 Product Guide...
Page 123: Enhanced System Audit And Investigation
Inlines commands to the audit log with a customer-meaningful description. This ensures that customers are able to monitor and create an audit trail for all work performed by EMC personnel. Note: The “Symmetrix Audit Log” on page 185 contains additional information.
Page 124: Multiple Channel Directors
Performance and Optimization Multiple channel directors The Symmetrix DMX-3 channel directors process data from the host and manage access to global memory over a direct matrix technology (Figure 8 on page 54). Each channel director on the Symmetrix DMX-3 supports eight internal links to global memory. The...
Page 125 Symmetrix GigE remote channels for SRDF transfer data at speeds up to 1 Gb/s. Symmetrix systems support GigE remote cable connections up to 524.93 ft (160 m) with multimode connections. Note: Contact your local EMC Sales Representative for GigE remote support availability. Multiple channel directors...
Page 126: Host Connectivity
Fibre Channels. The Symmetrix DMX-3 supports mainframe systems host connectivity through ESCON and FICON channels. Note: Symmetrix DMX-3 only supports Fibre Channel connectivity for iSeries hosts. The Symmetrix DMX-3 can support simultaneous connections to mainframe systems hosts and open systems hosts when the required Symmetrix ESP software is installed on the Symmetrix system.
Page 127: Open Systems Hypervolumes
UNIX that allow only 2 GB file systems per single logical disk. The Symmetrix DMX-3 allows up to 160 logical volumes on each Symmetrix DMX-3 open systems physical disk drive and up to 64,000 logical volumes (address range 0x000 - 0xF9FF) per Symmetrix DMX-3 system, depending on the hardware configuration and the data protection options.
Page 128: Logical Volume Mapping
Logical volume mapping (8:1) Figure 32 Metavolumes Several operating systems (such as Windows NT and Windows 2000), some applications software, and some open systems environments require larger volumes than are provided by standard Symmetrix physical disk drives. EMC Symmetrix DMX-3 Product Guide...
Page 129 That is, each member of the metadevice must be counted toward the maximum number of host-supported logical volumes. For information on Fibre Channel host attachments, refer to the EMC Support Matrix located on the EMC Powerlink website at: http://Powerlink.EMC.com.
Page 130: Concatenated Volumes
Although members of a striped set do not have to be the same size, the effective size of each member is the actual size of the smallest member rounded down to an even cylinder count. Therefore, when configuring such a metavolume, be careful to minimize wasted space. EMC Symmetrix DMX-3 Product Guide...
Page 131 Performance and Optimization A customer can reconfigure metavolumes. While the Symmetrix system is online to the host, the customer can: Expand both concatenated and striped metavolumes. Convert an unused volume to a concatenated or striped metavolume. Convert a populated volume to a concatenated or striped metavolume.
Page 132: Mainframe Systems Hypervolumes
The hypervolume extension feature has two usage options: Split-volume capability — Allows up to 255 logical volumes on each Symmetrix DMX-3 physical disk drive depending on the data protection option used. Extended cylinder addressing — Establishes a small logical volume at the end of physical disk drive for data requiring high performance on a small volume.
Page 133: Extended Cylinder Addressing Option
Performance and Optimization Symmetrix DMX-3 supports up to 255 logical volumes per physical disk drive and up to 64,000 logical volumes (address range 0x000– 0xF9FF) per system, depending on the Symmetrix DMX-3 hardware configuration and the data protection options. Note: “Symmetrix DMX-3 logical volume capacities”...
Page 134: Determining Cylinders For Hypervolume User Data
It also lists the number of alternate, diagnostic, and device support cylinders (ADDS) and the Symmetrix Internal Device Support Cylinders required for each logical volume by that particular emulation type. EMC Symmetrix DMX-3 Product Guide...
Page 135: Device Emulations And Number Of Cylinders
10,017 3390-27 32,760 3390-54 65,520 a. Contact your local EMC Sales Representative for currently supported IBM controller/DASD emulation modes. Note: Symmetrix DMX-3 systems can support 64K cylinder CKD devices for operating systems (Siemens) that can exploit it. Mainframe systems hypervolumes...
Page 136: Tiered Storage Optimization
• Statistics (general/global system statistics) • Priority statistics • Device statistics • Symmetrix Management Console provides intuitive graphical controls and monitoring for Symmetrix Priority Controls. Priority Controls also can be managed and monitored using SymmCLI commands. EMC Symmetrix DMX-3 Product Guide...
Page 137: Dynamic Cache Partitioning
Performance and Optimization Dynamic Cache This offering (a separate feature from Symmetrix Priority Controls) Partitioning allows modification of cache allocation for devices configured in the Symmetrix in order to help organizations manage multiple applications with tiered storage in the array. Cache partitioning is a logical partitioning of cache.
Page 138 If operations consistent with the system write pending limit are desired, this parameter should be left at 80 percent. EMC Symmetrix DMX-3 Product Guide...
Page 139: Optimizing Symmetrix System Performance
Symmetrix configuration according to the requirements of the hosts you are connecting to the Symmetrix system and your performance needs. Carefully review the issues listed below with your EMC representative before the EMC Customer Engineer installs the Symmetrix system.
Page 140: Virtual Lun Technology
5772 features: Symmetrix Management Console (SMC) Solutions Enabler Command Line Interface (CLI) (Using the symoptmz command and sub parameters) Note: Contact your local EMC Sales Representative for specifics on support and implementation of these tools. EMC Symmetrix DMX-3 Product Guide...
Page 141 Performance and Optimization Migration and relocation are based on Optimizer swap technology and share the same requirements as the traditional swap environment. Dynamic Relocation Devices (DRV’s) must be available to provide additional protection during the data movement process. Only devices with a matching sized DRV are eligible for Optimizer, Virtual LUN control.
Page 142: Smc Migration Dialog Step 1
1 of the SMC migration dialog, selecting the devices. Devices are highlighted and moved to the Selected Devices list on the right hand side of the dialog box. Figure 35 SMC migration dialog step 1 EMC Symmetrix DMX-3 Product Guide...
Page 143: Smc Migration Dialog Step 2
Performance and Optimization Figure 36 on page 143 shows step 2 of the SMC migration dialog, selecting the target disks. It is important to note that disks containing the source devices are excluded from the migration target disks. SMC migration dialog step 2 Figure 36 Optimizing Symmetrix system performance...
Page 144: Smc Migration Dialog Step 3
Virtual LUN migration. Note: See “Symmetrix Optimizer” on page 153 for additional information. Figure 37 SMC migration dialog step 3 EMC Symmetrix DMX-3 Product Guide...
Page 145: Dynamic Host Addressing
Performance and Optimization Dynamic Host Addressing Dynamic Host Addressing allows any device seen by any HBA to have any LUN number, by avoiding fixed LUN offsets. Dynamic Host Addressing is an enhancement to the VolumeLogix functionality to provide more flexibility of device addressing on Symmetrix ports.
Page 146: Virtual Provisioning
Performance and Optimization Virtual Provisioning Note: Refer to the Symmetrix DMX-3, DMX-4 Enginuity Release Notes and consult your local EMC Sales Representative for currently supported Virtual Provisioning features and availability. This new Enginuity 5773 product enables open systems users to be...
Page 147: Benefits Of Virtual Provisioning
Performance and Optimization smooth out response times. It also reduces performance management effort. Benefits of Virtual The benefits of Virtual Provisioning are: Provisioning Simplified storage management. Nondisruptive application provisioning. Offers significant cost efficiencies by reducing the amount of allocated-but-unused storage. Performance benefits from wide striping are most applicable to random IO, and occur because data is striped across more physical spindles than is often the case with standard...
Page 148 • Replication will not be supported with RAID 5 (3+1) data devices. Metavolumes supported — Metadevices can be created out of thin devices as long as all meta members are thin devices. There are no mixing of thin and normal devices in the same metadevice. EMC Symmetrix DMX-3 Product Guide...
Page 149: Multiport Volume Access For Open Systems Environments
(such as EMC PowerPath or HP-UX PV links). A volume can be accessed by up to 32 separate paths using EMC PowerPath. A volume can be configured to be visible on one channel for a hot standby scenario where one host can assume the devices of another host in case of a controller or host failure.
Page 150: Software Options Overview
“Solutions Enabler” on page 155 “Symmetrix Management Console” on page 155 EMC ControlCenter EMC ControlCenter is a family of products that provides you with an family of products integrated approach to managing your multivendor storage environment, and automating many of your common storage management tasks.
Page 151 Performance and Optimization OIC components include: User interfaces: • E Web Console Infrastructure: • ECC Server • Repository • Store Agents: • Host agents for Solaris, HP-UX, AIX, Linux, and Windows • Common Mapping Agent • Database Agent for Oracle •...
Page 152 StorageScope File Level Reporter SRM storage device management The storage device management solution allows you to actively configure and optimize storage arrays. This solution is achieved using the following ControlCenter applications: Symmetrix Manager Symmetrix Optimizer EMC Symmetrix DMX-3 Product Guide...
Page 153: Symmetrix Optimizer
Performance and Optimization Symmetrix Symmetrix Optimizer helps you increase the performance of a Optimizer Symmetrix system by spreading I/O activity evenly across the physical disks. When a particular drive is in high demand, there is excessive head movement on that drive. This movement slows down read and write activity.
Page 154: Timefinder Family Of Products
Maintain data coherency across TimeFinder-protected application volumes to ensure data consistency and restartability. • TimeFinder/Exchange Integration Module and TimeFinder SQL integration Module. Tight integration of the TimeFinder family with Microsoft Exchange and SQL applications for automated backup and restore. EMC Symmetrix DMX-3 Product Guide...
Page 155: Solutions Enabler
ControlCenter agents, such as Common Mapping Agent, you must install the EMC Solutions Enabler on the host managing the Symmetrix system (either the host running the Storage Agent for Symmetrix or a proxy host.
Page 156 Symmetrix Optimizer Virtual LUN technology, Symmetrix Priority Controls, and Dynamic Cache Partitioning. SMC security features include user authentication, restricted user roles, management of Symmetrix Access Controls, and management of the Symmetrix Audit Log. EMC Symmetrix DMX-3 Product Guide...
Page 157 Invisible Body Tag Data Integrity, Availability, and Protection This chapter discusses the Symmetrix DMX-3 features and options that affect data availability and reliability: Overview ................... 158 Reliability and availability features..........162 Maintaining data integrity.............. 175 DMX-3 security features ..............181 Data protection guidelines..............
Page 158: Data Integrity, Availability, And Protection
Global memory error correction and error verification Periodic system checks Error verification prevents temporary errors from accumulating and resulting in permanent data loss. Symmetrix systems also evaluate the error verification frequency as a signal of a potentially failing component. EMC Symmetrix DMX-3 Product Guide...
Page 159: Data Protection Options
Data Integrity, Availability, and Protection The periodic system check tests all components as well as microcode integrity. Symmetrix systems report errors and environmental conditions to the host system as well as the EMC Customer Support Center. Data protection Although the Symmetrix system has standard features that provide a...
Page 160 RAID 5 The Symmetrix DMX-3 supports RAID 5 data protection. This is an implementation of the industry-standard RAID 5 data-protection technique with rotating parity across all members of the RAID 5 set. RAID 5 provides cost-effective data protection against drive failure.
Page 161 SRDF applications. Note: Each of the SRDF product offerings is sold under a separate license by EMC. For more in-depth information about SRDF, refer to the EMC Symmetrix Remote Data Facility (SRDF) Product Guide. Contact your local EMC Sales Representative for specific information on availability of each of the SRDF products.
Page 162: Reliability And Availability Features
A periodic system check tests all components as well as microcode integrity. Symmetrix systems report errors and environmental conditions to the host system as well as the EMC Customer Support Center. Global memory Every Symmetrix system is configured with a minimum of two global...
Page 163: Channel Director Redundancy
ESCON remote replication ports 1-8 per ESCON Director a. Contact your local EMC Sales Representative for ESCON channel director and GigE Remote support availability. b. Usable ports are per qualified channel directors. Channel failover functionality is required to automate the failover and fail back process to avoid an interruption to data access.
Page 164: Internal Control Data Path Redundancy
The Fibre Channel back-end disk subsystem provides redundant paths to the data stored on the disk drives to provide nonstop access to information, even in the event of a component failure or replacement. EMC Symmetrix DMX-3 Product Guide...
Page 165: Fibre Channel Arbitrated Loop Design
Data Integrity, Availability, and Protection The following is an overview of the redundant components of the Symmetrix DMX back-end disk subsystem. Redundant disk A pair of directors is used to access each disk drive. One director is directors connected to one physical path to the drive, and the other director is connected to a second physical path to the drive.
Page 166 Data Integrity, Availability, and Protection Link control cards The LCC is the heart of the Symmetrix DMX-3 disk Fibre Channel loop and constantly monitors the loop for Fibre Channel layer 0/1 signal connection and protocol errors. If errors are detected, the...
Page 167: Fibre Channel Back-End Redundancy
Data Integrity, Availability, and Protection LCC B LCC A SYM-000422 Fibre Channel back-end redundancy Figure 38 Data integrity for Fibre In order to ensure that the data transmitted by the disk director is the Channel arbitrated same as the data received by the disk drive, a multilayer protection loops strategy is employed.
Page 168: Dual-Initiator Feature
EMC Customer Support Center. When the source of the failure is corrected, the Symmetrix system returns the I/O servicing of the two disk director processors to their normal state.
Page 169: Redundant Power Subsystem
Symmetrix DMX dual-initiator example Figure 39 Redundant power The Symmetrix DMX-3 has a modular power subsystem featuring a subsystem redundant architecture that facilitates field replacement of any of its components without any interruption in processing. The Symmetrix DMX system power subsystem has two power zones for redundancy and drive expansion.
Page 170: Vaulting
PDPs are connected to two separate source PDUs at the customer’s site. Upon an AC power loss to a single power zone, the system will maintain operation. EMC Symmetrix DMX-3 Product Guide...
Page 171: Battery Backup Units
When the Power Zone Task is enabled and the system loses AC power to a single power zone, a 20-hour timer is invoked. The system will call home to notify the EMC Customer Support Center of the event. When the timer counts down to five hours the system will again call home.
Page 172: Nondisruptive Component Replacement
Channel directors Disk directors Global memory directors Disk adapters Channel adapters Disk drives Cooling fan modules Communications and Environmental Control (XCM) modules Power supplies Power Distribution Units (PDU) Power Distribution Panels (PDP) EMC Symmetrix DMX-3 Product Guide...
Page 173: Nondisruptive Enginuity Upgrades
Interim updates of the Enginuity Operating Environment can be Enginuity upgrades performed at the customer site by the EMC Customer Engineer (CE). The nondisruptive upgrade will complete in 15 seconds or less. These updates provide enhancements to performance algorithms, error recovery and reporting techniques, diagnostics, and Enginuity fixes.
Page 174: Nondisruptively Change Or Remove Fba Devices
When attempting to add or delete devices, or change protection type of devices, a new minimum cache value will be calculated. In rare cases this new value could prohibit the changes until additional memory is added to the system. EMC Symmetrix DMX-3 Product Guide...
Page 175: Maintaining Data Integrity
“Byte-level parity checking” on page 179 “Global memory access path protection” on page 180 Remote support Remote support is an important and integral part of EMC Customer Support. Every Symmetrix unit has an integrated service processor that continuously monitors the Symmetrix environment. The service processor can communicate with the EMC Customer Support Center through a customer-supplied direct phone line.
Page 176: Error Checking And Correction, And Data Integrity Protection
Data Integrity, Availability, and Protection To provide remote support capabilities, the Symmetrix system is configured to phone home and alerts EMC Customer Support of a failure or potential failure. The appropriate authorized EMC Product Support Engineer is able to run system diagnostics remotely for further troubleshooting and resolution.
Page 177: Disk Error Correction And Error Verification
When the internal soft error threshold is reached, the Symmetrix service processor automatically dials the EMC Customer Support Center and notifies the host system of errors through sense data. The Symmetrix system also invokes sparing. This feature maximizes data availability by diagnosing marginal media errors before data becomes unreadable.
Page 178: Global Memory Director Data Integrity Logic
A service processor Call Home alerts EMC Global Service Call Centers whenever an unacceptable level of errors has been detected and a nondisruptive global memory director replacement is ordered.
Page 179: Global Memory Chip-Level Redundancy
This leads to chip-level redundancy, making every chip on the global memory director redundant. Redundant global Symmetrix DMX-3 global memory director operations are redundant memory by way of a primary and secondary global memory director working as a pair.
Page 180: Global Memory Access Path Protection
The Symmetrix system assures the highest level of data integrity by checking data validity through the various levels of the data transfer in and out of global memory. EMC Symmetrix DMX-3 Product Guide...
Page 181: Dmx-3 Security Features
Oxley Act of 2002. “EMC Certified Data Erasure for Symmetrix Disks” on page 186 — EMC Certified Data Erasure for Symmetrix disks is a service processor-based offering for failed disks within DMX-3 systems. The erasure function overwrites data multiple times in adherence with the Department of Defense specification 5220.22-M.
Page 182: Security Overview
Data Integrity, Availability, and Protection It complements EMC data erasure service for Symmetrix and ® CLARiiON frames, as well as a new EMC data erasure service for Fibre Channel and ATA disks removed from Symmetrix, ® CLARiiON and Celerra systems. Customers also can use ResourcePak, working with EMC Certified Data Erasure service, to erase volumes on mainframe-attached Symmetrix systems.
Page 183: Access Control And User Authorization
Data Integrity, Availability, and Protection Some of the security features are transparent to the customer such as service access authentication and authorization by the EMC CE and Service Credential (SC) (user ID information) restricted access (service processor and CE internal functions). Access is definable at a user level, not just at a host level.
Page 184 Auditor — Grants the ability to view, but not modify, security settings for a Symmetrix array (including reading the Symmetrix Audit Log, symacl list and symauth) in addition to all Monitor operations. This is the minimum role required to view the Symmetrix Audit Log. EMC Symmetrix DMX-3 Product Guide...
Page 185: Symmetrix Audit Log
Data Integrity, Availability, and Protection Symmetrix Audit Log The Symmetrix Audit Log logs EMC maintenance activities taking place on the Symmetrix service processor, as well as with host-initiated actions and physical component changes. Host commands may then be used to retrieve information from the...
Page 186: Emc Certified Data Erasure For Symmetrix Disks
Upon purchase of the EMC Certified Data Erasure for Symmetrix Disks licence, a configuration change will be executed by the CE at time of installation, or at a later time, to enable this feature. The EMC Certified Data Erasure for Symmetrix Disks licence will enable the following functions to be performed.
Page 187: Ipsec Security Features
Data Integrity, Availability, and Protection If the customer has purchased the EMC Certified Data Erasure for Symmetrix Disks Service, the following services will be provided by the EMC CE: A certificate of completion for all disks successfully erased. Those nonerasable drives will be left with the customer for disposition at no additional charge.
Page 188 These countermeasures mitigate many security attacks, including spoofing, tampering with data en route, connection hijacking, eavesdropping, and replay of transmission. IPsec is the same security technology used in many corporate VPN solutions, including EMC’s, to secure communication between a remote PC and corporate systems.
Page 189: Data Protection Guidelines
Symmetrix operation. CAUTION To ensure continuous data availability, EMC strongly recommends that you use one or more of the data protection schemes for your Symmetrix volumes as described in Table 28 on page 189.
Page 190 Provides an information protection/ business continuance solution by maintaining a mirror image Facility (SRDF) of data in multiple Symmetrix systems that can be in physically separate locations. For more information on SRDF, refer to the EMC Symmetrix Remote Data Facility (SRDF) Product Guide. See “SRDF family of products” on page 221 for related information.
Page 191: Disk Mirroring (Raid 1) Concepts
Data Integrity, Availability, and Protection Disk mirroring (RAID 1) concepts Symmetrix Mirroring (RAID 1) provides the highest level of performance and availability for all mission-critical and business-critical applications. Mirroring maintains a duplicate copy of a logical volume on two physical disk drives. The Symmetrix system maintains these copies internally by writing all modified data to both devices.
Page 192: Read Operations With Mirroring
Symmetrix system automatically uses the other volume without interruption of data availability. The Symmetrix system notifies the host operating system of the error and EMC Customer Support Center through the call-home feature. The EMC Product Support Engineer (PSE) then begins the diagnostic process and, if necessary, dispatches a Customer Engineer (CE) to the customer site.
Page 193: Dynamic Mirror Service Policy (Dmsp)
Data Integrity, Availability, and Protection Dynamic Mirror The Symmetrix DMSP is a feature of the adaptive algorithms in the Service Policy Symmetrix architecture that improves the performance of read (DMSP) operations in mirrored and Business Continuance Volume (BCV) environments. The improved system performance is a result of the Symmetrix system balancing the load between physical disk drives and disk directors, and minimizing actuator movement.
Page 194: Virtual Devices
CKD or FBA source devices. Virtual devices cannot be SRDF devices. Note: TimeFinder/Clone Mainframe SNAP Facility Version 5.6.0 Product Guide contains additional information. EMC Solutions Enabler Symmetrix TimeFinder Family CLI Version 6.4 Product Guide contains more information about virtual devices and TimeFinder/Snap operations.
Page 195: Symmetrix Raid 1/0 For Open Systems
M1/M2 pair until the end of the hyper is reached. Sequential read/write operations for a striped meta volume can be serviced by more spindles. For more details, please see EMC Symmetrix Storage Solutions Microsoft Exchange 2000 and 2003 Best...
Page 196: Symmetrix Raid 10 For Mainframe Systems
Figure 42 on page 196, enables greatly improved performance in mainframe systems. RAID 10 uses four pairs of disks in its Symmetrix DMX implementation. DMSP SYM-000136 Figure 42 RAID 10 with Dynamic Mirror Service Policy EMC Symmetrix DMX-3 Product Guide...
Page 197 RAID 10 configuration with four pairs of disks as compared to an alternative configuration using a single pair of disks. EMC has also observed 20 percent to 30 percent improvement in back-end disk performance when DMSP is used, compared with a situation in which each of the mirrored pair serves 50 percent of the read I/Os.
Page 198: Symmetrix Dmx Raid 5
This section describes the RAID 5 (3+1) and RAID 5 (7+1) features. RAID 5 overview The Symmetrix DMX-3 supports RAID 5 data protection. RAID 5 is architected around block-based multispindle parity protection. RAID 5 implements data striping and rotating parity across all hypervolumes of a RAID 5 device.
Page 199: Raid 5 (3+1)
Data Integrity, Availability, and Protection Parity 123 Data 1 Data 2 Data 3 Data 4 Parity 456 Data 5 Data 6 RAID 5 Data 7 Data 8 Parity 789 Data 9 logical Parity DEF Data D Data E Data F volume Data G Parity GHI...
Page 200: Normal Mode
Since many sequential tracks are written, they are all in Symmetrix global memory. The parity is calculated in global memory and information is written to the disks in one stroke without requiring the use of an expensive disk-level read-XOR-write operation. EMC Symmetrix DMX-3 Product Guide...
Page 201: Writing Data In Raid 5 Normal Mode
Data Integrity, Availability, and Protection Updating parity during writes XOR bit mask Write Write Read Read Write operation involves two instances of the read-modify-write sequence. A four-track stripe of parity A stripe of four tracks of data SYM-000726 Writing data in RAID 5 normal mode Figure 44 Reading data in Read hit operations in a Symmetrix RAID 5...
Page 202: Regeneration
When a device fails or becomes unavailable, the Symmetrix RAID 5 device is put in regeneration mode. All data is still available to the host, but is unprotected against additional failures unless protected by dynamic sparing or permanent sparing. EMC Symmetrix DMX-3 Product Guide...
Page 203 Data Integrity, Availability, and Protection If a physical device reports too many errors (even recoverable errors), or fails completely, that device is taken offline by the Symmetrix system. This condition causes the Symmetrix DMX system to place a remote service call to the Customer Support Center. The Product Support Engineer (PSE) at the support center can determine if a disk drive should be identified for replacement and dispatches a Customer Engineer (CE) who starts the Symmetrix...
Page 204: Raid 5 Performance Optimization
Note: Symmetrix systems can be configured with dynamic sparing to restore data protection from a second drive failure. “Dynamic sparing with RAID 5 volumes” on page 219 provides more information on dynamic sparing used with Symmetrix RAID 5. EMC Symmetrix DMX-3 Product Guide...
Page 205: Raid 5 Configuration Guidelines
Data Integrity, Availability, and Protection RAID 5 configuration The following are some guidelines to consider when configuring guidelines RAID 5 devices: BCVs can be RAID 5 devices. SymmOptimizer Swap supports RAID 5 devices. SRDF devices can be RAID 5 devices. eSNAP source and destination devices can be RAID 5 devices.
Page 206: Symmetrix Dmx Raid 6
RAID 6 stripes both data and parity across all hypervolumes of the RAID 6 device. Logically, the RAID 6 device is represented as a single mirror device. EMC Symmetrix DMX-3 Product Guide...
Page 207: Even-Odd Algorithm
Data Integrity, Availability, and Protection Figure 46 on page 208 shows a RAID 6 device consisting of Symmetrix hypervolumes on eight separate physical drives. Six data drives (D1–D6) and two parity drives (D7 horizontal parity and D8 diagonal parity). Figure 47 on page 209 shows a RAID 6 device consisting of Symmetrix hypervolumes on 16 separate physical drives.
Page 208: Raid 6 (6+2)
A RAID 6 (14+2) configuration consists of sixteen Symmetrix devices with parity and data striped across each device. With this option, effectively 87.5 percent of the total storage capacity of a RAID 6 device is available for storing data. EMC Symmetrix DMX-3 Product Guide...
Page 209: Rebuilding Data And Parity Members
Data Integrity, Availability, and Protection Figure 47 on page 209 shows a RAID 6 (14+2) data/parity layout. D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 Physical disk 1, in this slice there are 14 data drives, from D1 to D14 Physical disk 15, in this slice it contains the Horizontal Parity Physical disk 16, in this slice it contains the Diagonal Parity Null disk is a non existent drive whose contents is always zero but exists solely for the...
Page 210: Raid 6 Configuration Guidelines
(double-degraded mode), then RAID 6 dynamic sparing will be attempted. Uses special disk commands to perform XOR operations. Uses Symmetrix hardware functionality to perform XOR calculations. EMC Symmetrix DMX-3 Product Guide...
Page 211: Sparing In Symmetrix Systems
Data Integrity, Availability, and Protection Sparing in Symmetrix systems Symmetrix DMX-3 systems support both permanent sparing and dynamic (temporary) sparing functionality. Sparing increases data availability with minimum impact on performance. It is used in combination with all protection types, for example, mirroring, RAID 5, RAID 6, or SRDF.
Page 212 The EMC Customer Engineer can use Enginuity’s tools that define and enforce the many complex sparing rules. One of these tools is a disk map that shows each disk and the spares that cover it.
Page 213: Sparing Benefits
Data Integrity, Availability, and Protection A failing drive cannot be spared with a different speed, block size, or capacity; even 10K and 15K are not compatible (permanent sparing). The spare cannot be on the same port, disk director, or loop as any of the mirrors or RAID members of the failed disk (permanent sparing).
Page 214 Customer Support Center to force the Symmetrix system to rebuild/copyback the contents of a device to a permanent spare. This forced copy allows the EMC Customer Engineer to test or service a disk drive nondisruptively while access to data continues.
Page 215: Permanent Sparing Process
Data Integrity, Availability, and Protection Note: Beginning with Enginuity 5772.83.75 vault drives are eligible for permanent sparing if there is an available spare of the same speed, block size and capacity on the same loop as the failing drive. Vault devices can be relocated to different positions on the same loop, but cannot move to a different loop.
Page 216: Dynamic Sparing
Symmetrix system to place this drive in the spare pool, making them available should another volume fail in the future. EMC Customer Service is usually able to replace a failed drive within four hours. The time it takes to replace and resynchronize a failed drive within a RAID 5 group depends on the I/O activity to the logical volumes, the disk drive, and the disk capacity.
Page 217: Dynamic Sparing Process
Data Integrity, Availability, and Protection Data volume D1 protected by dynamic spare DS D1 failing, dynamic spare invoked D1(M1) D1(M2) DS mirrors D1 COPY Failed disk replaced and new D1(M1) D1(M2) disk restored as D1 COPY DS returns to spares pool Dynamic sparing process Figure 49 Note: Enginuity 5772 is no longer limited to invoking a single (same size or...
Page 218 When the copy operation completes, the Symmetrix system notifies the EMC Customer Support Center of the event. The spare and the original device work as a mirrored pair until the defective unit is replaced.
Page 219: Dynamic Sparing With Locally Mirrored Pairs
Data Integrity, Availability, and Protection Dynamic sparing with When a dynamic spare is invoked for a locally mirrored pair, the locally mirrored pairs Symmetrix system automatically augments the original mirrored pair with a dynamic spare volume that joins the mirrored pair as an additional or (third) mirror shown in Figure 50 on page 219.
Page 220 If the Symmetrix system cannot copy all data from the failing device to the spare, it retrieve the unavailable data from the good member of the remote pair. EMC Symmetrix DMX-3 Product Guide...
Page 221: Srdf Family Of Products
Recovery from planned outages Remote backup Data center migration Data replication and mobility Note: The EMC Symmetrix Remote Data Facility (SRDF) Product Guide contains specific information on the SRDF family of products. Base SRDF family The SRDF family consists of three base solutions: products SRDF/Synchronous (SRDF/S) —...
Page 222: Srdf Family Options
• SRDF/A Delta Set Extension or DSE enables asynchronous replication operations to remain active in the event system cache resources are becoming in danger of reaching the system write pending or SRDF/A max cache limit. EMC Symmetrix DMX-3 Product Guide...
Page 223 SRDF/A during workload and network resource imbalances. Note: For simplicity, this document uses the term SRDF to represent all EMC SRDF related products, including: SRDF/A, SRDF/AR (multi-hop and single-hop), SRDF/DM, and SRDF/CG.
Page 224 Data Integrity, Availability, and Protection EMC Symmetrix DMX-3 Product Guide...
Page 225 y Tag Mainframe Features and Support The information presented in this chapter is only applicable to Symmetrix drives connected to mainframe hosts. The following information is described: Introduction ..................226 Supported mainframe features ............227 Error reporting and recovery ............240 Sense byte information..............
Page 226: Mainframe Features And Support
Enginuity operating environment. Also included are descriptions of the types of errors possible when the Symmetrix system is connected to a mainframe host, error handling techniques, and an error recovery summary. EMC Symmetrix DMX-3 Product Guide...
Page 227: Supported Mainframe Features
EMC z/OS Storage EMC z/OS Storage Manager helps mainframe customers get full Manager value from EMC product faster and more efficiently. It is the first storage management product by a storage provider designed specifically for the mainframe. Customers can discover and monitor...
Page 228: Dynamic Channel Management
DPR must also be enabled when using extended platform functions, such as IBM’s Concurrent Copy. Note: DPR support is enabled by the EMC Customer Engineer at installation or service time. Consult your EMC Systems Engineer to determine if DPR is appropriate for your operating environment. Concurrent Copy Symmetrix systems support the IBM Concurrent Copy facility.
Page 229: Compatible Native Flash For Mainframe
Mainframe Features and Support Compatible Native Compatible Native Flash for Mainframe provides support for IBM Flash for Mainframe FlashCopy in order to meet IBM-specific replication requirements. It is a product that enables the making of point-in-time, full volume copies of data, with the copies immediately available for read or write access.
Page 230: Multi-Path Lock Facility/Concurrent Access
Transaction Processing Facility (TPF) host operating system environments. MPLF/CA allows multiple concurrent I/O requests to the same logical device from multiple TPF mainframes. Note: Contact your local EMC Sales Representative for availability of TPF support. The Symmetrix system maintains the names and status of logical locks currently in use and responds to requests to obtain or release a lock.
Page 231: Multiple Allegiance (Ma)
To enable this capability, users also must license the COMPAV/MA feature from EMC. The Symmetrix DMX systems must be defined to the host as a 2105 or 2107 control unit to support Parallel Access Volumes.
Page 232: Dynamic Support Of Parallel Access Volumes
I/O operations. This further reduces, and can even eliminate, IOSQ time and enables EMC’s PAV support for larger mainframe logical devices. COMPAV/MA is a licensed product from EMC.
Page 233: Raid 10 Striping
Mainframe Features and Support RAID 10 striping RAID 10 (one-zero) is a mirroring feature with striping used for mainframe environments. Four Symmetrix devices (each one-fourth the size of the original IBM device) appear as one IBM device to the host, accessible by way of one channel address. Any four devices can be chosen to define a group provided they are equally sized, same type (for example, all 3390), and have the same mirror configuration.
Page 234: Supported Escon Devices And Logical Paths
Mainframe Features and Support Supported ESCON Note: Contact your EMC Sales Representative for current ESCON availability. devices and logical paths Enginuity 5772 supports up to 4,096 channel addresses on one port and up to 2,048 channel addresses per port. Symmetrix DMX-4 eight-port ESCON director supports up to 1,024 logical paths per processor.
Page 235: Supported Ficon Devices And Logical Paths
Geographically Dispersed Parallel Sysplex (GDPS) solution. Compatible Peer is available on Symmetrix systems with connections to ESCON or FICON hosts. Note: Contact your local EMC representative for specific details regarding your Symmetrix system's support for Compatible Peer. Supported mainframe features...
Page 236: Xrc Support
The basic concept is that the System Data Mover (SDM) polls, or receives attention interrupts from, the primary control units it is servicing and retrieves from them all new or updated records. EMC Symmetrix DMX-3 Product Guide...
Page 237: Configuring Ckd Volumes
This is shown in Figure 55 on page 237. Note: Only Enginuity level 5772 supports XRC functionality. Contact your EMC Sales Representative for specific details regarding your Symmetrix system’s support for XRC. Session1 SF: Journal Session2 SF:...
Page 238: Deleting (And Then Adding) Devices Online
FICON connectivity, backup, and recovery. Note: For specific Cascading and Open System Intermix configuration requirements, contact your local EMC Sales Representative. FICON Cascading configurations Cascading provides greatly enhanced FICON connectivity within local and remote sites through the use of switch-to-switch extensions of the CPU to the DMX FICON network.
Page 239 These switches can also be Cascaded to further enhance connectivity and remote backup and recovery. The EMC and IBM branded McDATA and INRANGE switches are supported. To support Open Systems Intermix, each vendor requires specific models, hardware and software features, configuration settings, and restrictions.
Page 240: Error Reporting And Recovery
Temporary errors recovered by the operating system are logged by the host Error Recovery Procedures (ERP). When requested, the Symmetrix system generates sense bytes and sends them to the operating system. These sense bytes define the error. EMC Symmetrix DMX-3 Product Guide...
Page 241 Mainframe Features and Support An error is permanent from a system view if neither the host operating system nor Symmetrix system can recover from the error condition. For example, a channel director may cause a data check error. That data check is permanent to the system and is recorded in the error recording dataset (ERDS) as a permanent path error.
Page 242: Error Reporting
Error reporting The Symmetrix system reports error conditions to the host and to the EMC Customer Support Center through its Autocall feature. The Symmetrix system presents a unit check status in the status byte to the channel whenever it detects an error condition such as a data check, command reject, overrun, or equipment check.
Page 243 Mainframe Features and Support component failure such as the failure of one device in a mirrored pair or the activation of dynamic sparing. Environmental tests If, while running its environmental tests, the Symmetrix system error flag detects an error condition, it sets a flag to indicate a pending error and presents a unit check status to the host on the next I/O operation.
Page 244: Environmental Errors Reported As Sim Messages
Table 31 Hex code Severity alert Description SIM ref code 0453 Remote Service Syscall EMC transfer poll from host. PC call home. 1453 0454 Service Too many suspend/halt chains, switching to ADP-WP. Call home probably E454 MVS PAGE DATA SET.
Page 245 Mainframe Features and Support Environmental errors reported as SIM messages (2 of 3) Table 31 Hex code Severity alert Description SIM ref code 0463 Serious One of the disk adapters failed into IMPL Monitor. 2463 0464 Service Migration has completed the migration for all migration devices. E464 0465 Service...
Page 246: Operator Messages
Error messages. They have the format shown in Figure 56 on page 246 Figure 57 on page 247. *IEA480E 1903,SCU,ACUTE ALERT,MT=2105,SER=0507-00025, REFCODE=247A-0000-0000 247A = AC Line Failure or Interruption SYM-0 z/OS IEA480E service alert error message format Figure 56 (AC power failure) EMC Symmetrix DMX-3 Product Guide...
Page 247: (Mirror-1 Volume In "Not Ready" State)
Mainframe Features and Support *IEA480E 1900,DASD,SERIOUS ALERT,MT=2105,SER=0507-00025, REFCODE=E473-0000-7B01,VOLSER=LSJ13B,ID=01 Channel address = 7B Number of errors = 01 Note: E473 = Mirror-1 volume in “Not Ready” state Channel address of the “Not Ready” device SYM-001084 z/OS IEA480E service alert error message format Figure 57 (mirror-1 volume in “not ready”...
Page 248: Erep Reports
EREP error records Error records processed by EREP are described in detail in the IBM EREP manual. Note: Refer to the IBM EREP user's guide and reference for the formats of these records. EMC Symmetrix DMX-3 Product Guide...
Page 249: Error Handling
EMC Customer Engineer. If your system reports that temporary data check errors are occurring on the Symmetrix system, and you consider the number of temporary errors for a volume to be excessive, notify your EMC Customer Engineer. Table 32 on page 249 describes the error handling process you should follow for the Symmetrix system.
Page 250: Detecting The Error
Symmetrix system at the time of the last failure, and the permanent and temporary error counts on that device. EMC Symmetrix DMX-3 Product Guide...
Page 251: Sense Byte Information
Mainframe Features and Support Sense byte information Note: The information presented in this chapter is only applicable to Symmetrix drives connected to mainframe hosts. The Symmetrix system presents a unit check status in the status byte to the channel whenever it detects an error condition. The error condition can be one of the error types associated with data such as a data check, command reject, overrun, or equipment check.
Page 252: Unit Status Bits
Bit 14 Interface-control check — Invalid signal from the Symmetrix system (invalid signal sequence, overly slow response, or parity error on Bus In). Bit 47 Bit 15 Chaining check — Channel overrun during input operation. EMC Symmetrix DMX-3 Product Guide...
Page 253: Host Sense Byte Data Formats
Mainframe Features and Support Note: You can find a detailed description of these status bits in the appropriate IBM Principles of Operation. Host sense byte Sense byte formats are found in the IBM reference manual data formats appropriate for the specific Symmetrix system emulation. Sense byte information...
Page 254 Mainframe Features and Support EMC Symmetrix DMX-3 Product Guide...
Page 255 Invisible Body Tag Symmetrix DMX-3 Specifications This appendix contains the specifications of the Symmetrix DMX-3 system: Storage control.................. 256 Physical data ..................264 Environmental data ................. 266 Power and cooling data..............269 Electrical specifications and power requirements....... 270 Symmetrix DMX-3 Specifications...
Page 256: Symmetrix Dmx-3 Specifications
1 TB = 1000 * 1000 * 1000 * 1000 bytes. A Symmetrix DMX-3 reserves two SFS logical volumes consisting of 6,140 cylinders each (slightly less than 6 GB). These volumes are protected using mirroring, consuming slightly less than 24 GB total physical space.
Page 257: Dmx-3 73 Gb Disk Capacities
Symmetrix DMX-3 Specifications DMX-3 73 GB disk capacities Table 35 Minimum Maximum Item capacity capacity Number of drives 1,920 Raw capacity Open systems (TB) 7.04 140.82 Mainframe (TB) 6.95 139.02 Mirrored Open systems (TB) 3.52 70.41 Mainframe (TB) 3.48 69.51...
Page 258: Dmx-3 146 Gb Disk Capacities
RAID 5 (7+1) Open systems (TB) 12.32 246.45 Mainframe (TB) 12.16 243.29 RAID 6 (6+2) Open systems (TB) 10.56 211.24 Mainframe (TB) 10.43 208.53 RAID 6 (14+2) Open systems (TB) 12.32 246.45 Mainframe (TB) 12.16 243.29 EMC Symmetrix DMX-3 Product Guide...
Page 259: Dmx-3 300 Gb Disk Capacities
Symmetrix DMX-3 Specifications DMX-3 300 GB disk capacities Table 37 Minimum Maximum Item capacity capacity Number of drives 1,920 Raw capacity Open systems (TB) 28.78 575.54 Mainframe (TB) 28.41 568.15 Mirrored Open systems (TB) 14.39 287.77 Mainframe (TB) 14.20 284.08...
Page 260: Dmx-3 450 Gb Disk Capacities
Open systems (TB) 32.4 Mainframe (TB) 32.0 RAID 5 (7+1) Open systems (TB) 37.8 Mainframe (TB) 37.3 RAID 6 (6+2) Open systems (TB) 32.4 Mainframe (TB) 32.0 RAID 6 (14+2) Open systems (TB) 37.8 Mainframe (TB) 37.3 EMC Symmetrix DMX-3 Product Guide...
Page 261: Dmx-3 500 Gb Disk Capacities
Symmetrix DMX-3 Specifications DMX-3 500 GB disk capacities Table 39 Minimum Maximum Item capacity capacity Number of drives 1,920 Raw capacity Open systems (TB) 47.96 959.24 Mainframe (TB) 47.35 946.92 Mirrored Open systems (TB) 23.98 479.62 Mainframe (TB) 23.67 473.46...
Page 262 27,844 3390-54 emulation 55,688 a. Contact your local EMC Sales Representative for 3380 and 3390-54 emulation availability. Bytes/Track Note: Fixed Block Architecture (FBA) capacities are based on 512 bytes per block, 128 blocks per track, and 15 tracks per cylinder.
Page 263 1,770 3380K emulation 2,655 3390-1 emulation 1,113 3390-2 emulation 2,226 3390-3 emulation 3,339 3390-9 emulation 10,017 3390-27 emulation 32,760 3390-54 emulation 65,520 FBA (maximum) 65,520 a. Contact your local EMC Sales Representative for 3380 and 3390-54 emulation availability. Storage control...
Page 264: Physical Data
Symmetrix DMX-3 Specifications Physical data The Symmetrix DMX-3 supports configurations of one system bay and from one to eight storage bays. Table 40 on page 264 through Table 42 on page 265 contain the physical data for the DMX-3 system.
Page 265: Multibay Weights
Symmetrix DMX-3 Specifications Multibay weights Table 42 Maximum rate per caster Description Weights lbs (kg) Rolling load rates per tile (front) System bay 1,626 lbs (737.5 kg) 1,000 lbs (453.6 kg) 600 lbs (272.2 kg) Storage bay 2,422 lbs (1,098.6 kg) 1,000 lbs (453.6 kg)
Page 266: Environmental Data
This section provides the environmental data for the Symmetrix DMX-3 system. Environmental The Symmetrix DMX-3 requires a period of time to become Acclimation acclimated to a data center environment. Use the following process to prepare the system for the data center: Completely remove all packing material from the system.
Page 267: Operating Environment Specifications
Symmetrix DMX-3 Specifications Operating environment specifications Table 44 Condition System bay and storage bay settings Operating temperature –90 F (10 to 32 Operating altitude (at 32 7,500 ft (2,286 m) Operating altitude (maximum) 10,000 ft (3048 m) 1.1 derating per 1,000 ft...
Page 268 System bay and six storage bays 71.3 System bay and seven storage bays 8.84 71.8 System bay and eight storage bays 8.88 72.2 a. Average sound pressure measurement of the four standby positions per STATSKONTORET. b. Calculated value. EMC Symmetrix DMX-3 Product Guide...
Page 269: Power And Cooling Data
All system bay values are for a fully loaded configuration of channel directors, disk directors, global memory directors, and complete power subsystem. All storage bay values are for a fully loaded configuration of 16 and 240 disk drives. Contact your local EMC Sales Representative for specific supported configurations.
Page 270: Electrical Specifications And Power Requirements
Electrical specifications and power requirements This section describes electrical specifications, power cables, connectors, and extension cords for the Symmetrix DMX-3 system bay and each storage bay for North American and international sites. The DMX-3 system uses three-phase power only. The type of input power is determined by the PDP (power distribution panel) required.
Page 271: North American Power Specifications
Symmetrix DMX-3 Specifications North American Table 49 on page 271 describes the electrical specifications for the power Symmetrix DMX-3 system bay and storage bays for systems installed specifications in North American, three-phase, Delta environments. Electrical specifications, North American, three-phase, four-wire Table 49...
Page 272: Emc Model Number Dmx3-Pcbl3Dhr Cable Description
9P54U2 P1-X P2-X P1-Y P2-Y P1-Z P2-Z P1-G P2-G SYM-001095 PG EMC model number DMX3-PCBL3DHR cable description Figure 62 DMX3-PCBL3DHH three-phase, four-wire 50 AMP (200~240 VAC line-to-line) (Delta) CS8364 CS8365 Marker, label ID 180.0” +/- 6.0” (15 ft) CS8364 Color...
Page 273: System Bay And Storage Bay Wiring, North America (Delta)
Symmetrix DMX-3 Specifications Figure 64 on page 273 illustrates the North American (Delta) wiring for Symmetrix DMX-3. Rear Customer Customer PDU B PDU A 8 AWG, Type W, 8 AWG, Type W, 50 A 50 A circuit 4-wire cable 4-wire cable...
Page 274: International Power Specifications
Symmetrix DMX-3 Specifications International power Table 51 on page 274 describes the electrical specifications for the specifications Symmetrix DMX-3 system bay and storage bays for systems installed in international, three-phase, five-wire (WYE) environments. Table 51 Electrical specifications, international, three-phase, five-wire, (WYE) Specification International three-phase (WYE) –...
Page 275: Emc Model Number Dmx3-Pc3Yafle Cable Description
P1-X P1-Y P1-Z P1-W GRN/YEL P1-G SYM-001094 PG Figure 65 EMC model number DMX3-PC3YAFLE cable description DMX3-PCBL3YAG three-phase, five-wire 32 AMP (200~240 VAC line-to-neutral) (WYE) ABL SURSUM K52.30 GARO P432-6 Marker, label ID 180.0” +/- 6.0” (15 ft) ABL SURSUM...
Page 276: System Bay And Storage Bay Wiring With Flying Leads (Wye)
Symmetrix DMX-3 Specifications Figure 67 on page 276 illustrates the international (WYE) wiring and with flying leads for the Symmetrix DMX-3 system. Rear 5 x 6.0mm2 5 x 6.0mm2 Customer Customer circuit circuit Wire Cable Wire Cable PDU B PDU A...
Page 277: Power Sequences
Invisible Body Tag Power Sequences This appendix provides instructions for powering the Symmetrix DMX-3 up and down: Vaulting ..................... 278 Routinely powering up the Symmetrix DMX-3 ......279 Powering down the Symmetrix DMX-3 ........281 Power Sequences...
Page 278: Vaulting
• A loss of battery holdup time will indicate a "Need to Vault" • A loss of BBU battery holdup time will prevent the system from powering up due to a lack of battery power to complete the vault (minimum 300 sec needed) EMC Symmetrix DMX-3 Product Guide...
Page 279: Routinely Powering Up The Symmetrix Dmx-3
Note: For Symmetrix DMX-3 power connection and configuration requirements, refer to the EMC Symmetrix DMX-3 Physical Planning Guide and the EMC Symmetrix DMX-3 and DMX-4 Best Practices Guide for AC Power Connections. Do not use the following procedures for powering up the Symmetrix DMX-3 for the first time.
Page 280: Symmetrix Dmx-3 System Bay And Storage Bay Power Switches
Power switch switch Power Zone B Power Zone A Power Zone B Power Zone A Left side Right side Left side Right side SYM-000976 Symmetrix DMX-3 system bay and storage bay power switches Figure 68 EMC Symmetrix DMX-3 Product Guide...
Page 281: Powering Down The Symmetrix Dmx-3
Power Sequences Powering down the Symmetrix DMX-3 Note: The Symmetrix DMX-3 is designed to stay powered up for most all situations. Unless there is an emergency situation, first call the EMC Service Support Center for assistance before powering down the Symmetrix DMX-3.
Page 282 Power Sequences EMC Symmetrix DMX-3 Product Guide...
Page 283 Invisible Body Tag Planning and Installation This appendix covers the tasks you need to complete when planning or verifying the physical configuration of the Symmetrix DMX-3 or creating I/O addressing schemes: Planning overview ................284 Symmetrix DMX-3 power requirements ........288 System placement options ..............
Page 284: Planning And Installation
Symmetrix DMX-3 When planning the installation site for your Symmetrix DMX-3, you presite will need to meet with your EMC team to complete the presite plan. considerations The DMX-3 has one system bay and from one to eight storage bays.
Page 285 Presite Survey completed with the EMC Systems Engineer reports the cable lengths (Fibre Channel or serial) required for each host connection to the Symmetrix DMX-3. From a physical planning perspective, review the routing paths from the hosts to the Symmetrix DMX-3. Resolve any physical access issues before the installation date.
Page 286: Layout And Space Recommendations
WARNING Before the Symmetrix DMX-3 bays are rolled into position in the computer room, note how close the wheels are to the edge of the cutout. If the Symmetrix system needs to be relocated, contact the EMC Customer Support Center.
Page 287: Transportation And Delivery Guidelines
A Symmetrix DMX-3 delivered within the United States or Canada delivery guidelines travels by air-ride truck or van. The Symmetrix DMX-3 system bay and storage bays are shrouded by custom-designed shipping material, crated, and palleted. Integrated shock absorbing casters on which the Symmetrix DMX-3 system bay and storage bay rest facilitate their movement during shipping and installation.
Page 288: Symmetrix Dmx-3 Power Requirements
The customer is responsible for supplying and installing the required receptacles on two separate power distribution units (PDUs) for Zone A and Zone B power for the Symmetrix DMX-3 system bay and each storage bay in advance of delivery. Figure 69...
Page 289: Dmx-3 Power Cabling Requirement
SYM-000921 DMX-3 power cabling requirement Figure 70 Note: Symmetrix DMX-3 requires two dedicated and isolated AC power feeds that plug directly into the PDPs of the bays. The customer must supply separate PDU connections for proper power redundancy. DMX-3 power redundancy can only be assured at the customer PDU and after.
Page 290: Symmetrix Touch Current Compliance
Planning and Installation Symmetrix touch current compliance CAUTION The Symmetrix DMX-3 system bay and the storage bay power supplies should not be connected on the separate Main and Auxiliary circuit panels to differential trip devices. These devices are typically called GFCI (Ground Fault Circuit Interrupter), GFI (Ground Fault Interrupter), ELCB (Earth Leakage Circuit Breaker), or Residual Current Circuit Breakers.
Page 291: Regulatory Compliance
HIGH LEAKAGE CURRENT Earth connection essential before connecting supply. The Symmetrix DMX-3 is a Stationary Pluggable Type B system, and has been extensively tested and certified to meet the above standard, including the application of the following warning labels in English...
Page 292: Choosing A Ups
If you need to extend this time period, you will need to purchase a UPS from a qualified vendor. EMC neither offers nor recommends any specific UPS suppliers or product type for its customers. This said, EMC uses preferred suppliers for UPS systems in their facilities. Therefore, if you, the...
Page 293: System Placement Options
Planning and Installation System placement options The Symmetrix DMX-3 system configurations can be installed in several different flooring environments. The system can be installed on a nonraised floor or raised floor environment. Although it is not required, the raised floor environment is the preferred installation environment.
Page 294: Overhead Host Cable Routing
Overhead power If the customer requires power to be supplied from overhead then cable routing EMC recommends the power cables be dropped on the outside of the cabinet next to the hinge side of the doors and routed inside the machine.
Page 295: Floor Load-Bearing Requirements
The customer is responsible for meeting all of his/her local installation safety requirements. Note: Although EMC does not require raised floors for routing power cables, it is recommended. Floor load-bearing...
Page 296 Failure to comply with these floor-loading requirements could result in severe damage to the Symmetrix DMX-3 system, the raised floor, subfloor, site floor and the surrounding infrastructure should the raised floor, subfloor or site floor fail.
Page 297: Symmetrix Dmx-3 Configuration Floor Cutouts
Planning and Installation Symmetrix DMX-3 Several DMX-3 configurations are available. Figure 72 on page 297 configuration floor illustrates the configuration and the recommended floor tile cutouts cutouts for a system bay and eight storage bays. To build a smaller system, remove storage bays as necessary around the system bay.
Page 298: Planning Host Connectivity
Planning and Installation Planning host connectivity The Symmetrix DMX-3 supports open systems connectivity through Fibre Channel and iSCSI channel directors. Mainframe connectivity is supported through ESCON and FICON channel directors. SRDF connections are supported through GigE connections between Symmetrix systems.
Page 299: Symmetrix Dmx-3 Channel Adapter Port Worksheet
Planning and Installation Symmetrix DMX-3 channel adapter port worksheet (1 of 2) Table 54 Director model & Quantity of Fibre-MM Fibre-SM FICON-SM FICON-MM ESCON Gig-E -MM number of ports directors ports ports ports ports ports ports DMX3-80000B Fibre-MM, 8 ports...
Page 300 Planning and Installation Table 54 Symmetrix DMX-3 channel adapter port worksheet (2 of 2) Director model & Quantity of Fibre MM Fibre SM FICON SM FICON MM ESCON Gig-E MM number of ports directors ports ports ports ports ports ports...
Page 301: Open Systems Installations
This section contains hardware and host checklists to be used when connecting a Symmetrix DMX-3 to open systems hosts. For the most current information on the Symmetrix system and specific host integration, contact your local EMC Sales Representative, or refer to the EMC Powerlink website.
Page 302: Host Checklist
Size of volumes required to be visible to host. Total customer-usable data storage required. Will host-level mirroring be used, which volumes? Does the customer have the recommended number of spares? (EMC order entry) Will Symmetrix Mirrored (RAID 1) be used, which volumes?
Page 303: Unix Or Pc Server Host Checklist
Percentage of available Symmetrix data capacity used by that host. c. Special attention is required when using a Logical Volume Manager (LVM) or data striping when using hypervolumes. In general, EMC recommends using data striping on the Symmetrix system. Keep in mind that the larger the granularity of the striping, the less effective it becomes.
Page 304: Available Emc Fibre Channel Cables
Available EMC Fibre Table 57 on page 304 lists the Symmetrix Fibre Channel cables Channel cables currently available from EMC. To obtain these cables, contact your local EMC Sales Representative. Table 57 EMC Fibre cables - Fibre Channel connect Multimode Fibre Cables - 50 micron...
Page 305: Available Emc Gige/Iscsi Cables
Planning and Installation Available EMC Table 58 on page 305 lists the Symmetrix GigE/iSCSI Channel cables GigE/iSCSI cables currently available from EMC. To obtain these cables, contact your local EMC Sales Representative. GigE/iSCSI channel cables Table 58 Model Description Where Used...
Page 306: Mainframe Systems Installations
This section contains hardware and host checklists to be used when connecting a Symmetrix DMX-3 to mainframe systems hosts. For the most current information on the Symmetrix system and specific host integration, contact your local EMC Sales Representative, or refer to the EMC Powerlink website.
Page 307: Available Emc Escon Cables
Planning and Installation Available EMC Table 60 on page 307 lists the Symmetrix DMX-3 ESCON cables ESCON cables currently available from EMC. To obtain these cables, contact your local EMC Sales Representative. ESCON channel cables Table 60 Model Description Where used...
Page 308: Available Emc Ficon Cables
Available EMC Table 61 on page 308 lists the Symmetrix DMX-3 FICON cables FICON cables currently available from EMC. To obtain these cables, contact your local EMC Sales Representative. Table 61 EMC Fibre cables - FICON 9 micron connect Model number...
Page 309: Glossary
U.S. asynchronous Transmission in which synchronization is done on a per-byte basis. transmission The synchronizing handshake is done using REQuest and ACKnowledge signals. EMC Symmetrix DMX-3 Product Guide...
Page 310 A standard Symmetrix device with special attributes that allow it to volumes (BCVs) independently support applications and processes, such as backup operations, restore operations, Decision Support operations, and application testing. BCV devices are available through the EMC TimeFinder software. byte Any 8-bit unit of data storage.
Page 311 A Symmetrix feature that automatically creates a backup data path to the disk drives serviced directly by a disk director, if that disk director or the disk management hardware for those devices fails. EMC Symmetrix DMX-3 Product Guide...
Page 312 ESCON Multiple Image Facility. Allows sharing of ESCON channels among logical partitions (LPAR). Enginuity Enginuity is the operating environment for the EMC Symmetrix Enterprise Storage Platforms. Enginuity provides functional services for both its host Symmetrix systems as well as for a large suite of EMC Storage Application software.
Page 313 1 GB = 1024 * 1024 * 1024 bytes. The GB 10 value is based on the convention: 1 GB = 1000 * 1000 * 1000 bytes. Although these values are expressed differently, their values are equivalent EMC Symmetrix DMX-3 Product Guide...
Page 314 The reference point on a disk surface that determines the start of a track. IOCP Input/Output Configuration Program. initiator A SCSI device (usually a host system) that requests an operation to be performed by another SCSI device. EMC Symmetrix DMX-3 Product Guide...
Page 315 Exclusive OR (XOR) of the accumulated bytes in the data record. code (LRC) LPAR Logical Partition or Logical Partitioning Mode. Mainframe system function that allows different operating systems to run concurrently in separate logical partitions. See also EMIF. EMC Symmetrix DMX-3 Product Guide...
Page 316 Multiprotocol Channel Director Multiple Virtual Storage (mainframe systems only). multiprotocol channel The Symmetrix DMX-3 MPCD can be configured with various director mezzanine cards, which support connects to hosts using iSCSI and FICON protocols. A GigE remote support mezzanine card supports connections between Symmetrix systems running SRDF.
Page 317 RAID 5 (7+1) configurations consists of eight Symmetrix devices with data and parity striped across each device. read hit The name of the action taken when data requested by the read operation is in global memory. EMC Symmetrix DMX-3 Product Guide...
Page 318 DASD to Symmetrix 5000 systems. serial channel ESCON channel (mainframe hosts). short miss Requested data is not in global memory, but is in the process of being fetched. Start I/O. EMC Symmetrix DMX-3 Product Guide...
Page 319 1 TB = 1024 * 1024 * 1024 * 1024 bytes. The TB 10 value is based on the convention: 1 TB = 1000 * 1000 * 1000 * 1000 bytes. Although these values are expressed differently, their values are equivalent EMC Symmetrix DMX-3 Product Guide...
Page 320 There is room in global memory for the data presented by the write operation. write miss There is no room in global memory for the data presented by the write operation. EMC Symmetrix DMX-3 Product Guide...
Page 321: Index
172 34, 231 BCV pairs 193 COM-PAV 34 block capacity 70, 128 Concurrent Copy 228 block format sizes 69 configuring data protection options business continuance volumes (BCVs) 193 RAID 5 205 connect time 105, 106 EMC Symmetrix DMX-3 Product Guide...
Page 322 ECM 90 mirroring, mission-critical/business-critical electrical specifications 271, 274 EMC APIs 30 SRDF 161 EMC Certified Data Erasure for Symmetrix Disks data recovery dynamic sparing with mirrored pairs 219 to EMC ControlCenter 39 EMC ControlCenter family of products 150 dynamic sparing with SRDF 220...
Page 323 37, 83, 117, 172 index marker 73 management 103 to 104 Information mobility software 40 prefetch algorithm 104 installation planning requirements for PermaCache 121 mainframe systems 306 to 308 sizes 83 open systems 301 to 305 EMC Symmetrix DMX-3 Product Guide...
Page 324 RAID 6 160, 189, 206 RAS enVision 185 Partitioned Dataset (PDS) Search Assist 230 read miss 109 PC server hosts 128 read operations 108 to 109 PDS Assist 230 long miss 109 pend time 105 read miss 109 EMC Symmetrix DMX-3 Product Guide...
Page 325 Soft error thresholds 177 Symmetrix device capacities 31 Solutions Enabler 155 Symmetrix DMX-3 slot configuration 57 sparing benefits 213 Symmetrix DMX-3 storage bay components 50 sparing configuration rules 211 Symmetrix DMX-3 system bay components 48 specifications Symmetrix file system (SFS) 122...
Page 326 252 UNIX 68 UNIX hosts 128 vault 170 virtual LUN 140 Virtual Provisioning 146 VM error records 248 VolumeLogix 145 Windows 68, 75 write operations delayed fast write 111 fast write 110 XRC support 236 EMC Symmetrix DMX-3 Product Guide...

EMC Symmetrix DMX-3 Product Manual

Warnings and Cautions

Preface

Chapter 1 Introducing the Symmetrix DMX-3

Chapter 2 Symmetrix DMX-3 Hardware

Chapter 3 Symmetrix DMX-3 Input/Output Operations

Chapter 4 Performance and Optimization

Chapter 5 Data Integrity, Availability, and Protection

Chapter 6 Mainframe Features and Support

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Summary of Contents for EMC Symmetrix DMX-3