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DataDirect Networks EF2915 Series User Manual

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  • Page 1 EF2915 Series User Guide...
  • Page 2 EF2915 Series User Guide P/N 801-000013 REV 53...
  • Page 3 (C) 2002-2007 iQstor Networks, Inc. All rights reserved. This publication, the EF2915 Series printed circuit boards, and related documentation are protected by Federal copyright law, with all rights reserved. No part of this product may be copied, photocopied, reproduced, stored in a retrieval system, translated, transcribed or transmitted, in any form or by any means manual, electric, electronic, electromagnetic, mechanical, optical or other- wise, in whole or in part without prior explicit written consent from iQstor Networks, Inc.

  • Page 4: Table Of Contents

    DataDirect Networks Welcomes Your Comments ........
  • Page 5 DataDirect Networks SAN Manager Functions ........44...
  • Page 6 Host cannot probe the EF2915 by format command ....... 60 DataDirect Networks SAN Manager cannot detect the EF2915 on the Fibre Channel..61 SFP connectivity problem .
  • Page 7 EF2915 Series User Guide...

  • Page 8: Chapter 1 About This Guide

    Chapter About this Guide This chapter contains information on the contents and organization of this user guide including the intended audience, use of note, caution, and warning symbols, and typographical conventions. EF2915 Series User Guide...

  • Page 9: Intended Audience

    SAN and Fiber Channel technology, and RAID technology. This chapter also contains a list of key terms and specifications. Chapter 3, “Setting Up the EF2915 Series System.” Contains information on installing and connecting the system, starting it up, the front and rear panels, LED indicators, serial port configuration, and probing and testing the EF2915.

  • Page 10: Notes, Cautions, And Warnings

    Caution: Explains situations where damage to the equipment could result if a procedure is not followed correctly. Warning: Indicates that hazardous voltages or potential system damage could occur if a procedure is not followed correctly. EF2915 Series User Guide...

  • Page 11: Typographical Conventions

    <Ctrl> A key that is pressed. DataDirect Networks Welcomes Your Comments We are interested in improving our documentation and welcome your comments and suggestions. You can email or fax your comments to us. Please include title and revision number of your document in the subject line of your email or fax message.

  • Page 12: Chapter 2 The Ef2915 Series Storage System

    Chapter The EF2915 Series Storage System Congratulations on selecting the DataDirect Networks Inc. EF2915 Series for your storage area network (SAN). Your storage system provides: • Up to 15 hot-swappable, high-performance Fibre Channel or SATA disk drives. • Disk drives configurable as RAID sets of level 0, 1, 1+0, 3, 5, 50, or 6.

  • Page 13: What Is The Datadirect Networks San Solution

    The following sections provide an overview of SAN, Fibre Channel, iSCSI, and RAID concepts and functions. An understanding of RAID/JBOD general principles can help you get the most out of the DataDirect Networks EF2915 Series storage system. For detailed descriptions of all DataDirect Networks storage subsystem configuration options and parameters, see your Administration and Operations User Guide.

  • Page 14: San Overview

    Chapter 2: The EF2915 Series Storage System SAN Overview SAN Overview The explosion of corporate computer use and the reliance upon computers to store all types of data has created the data storage industry. According to recent studies, the data storage demands of corporations is doubling every six to nine months.

  • Page 15: Elements Of A San

    Chapter 2: The EF2915 Series Storage System SAN Overview Elements of a SAN Each type of network requires different devices or elements in order to provide the desired functionality of that network. The list below describes the various elements that comprise a SAN.

  • Page 16: Example - Fibre Channel San

    Chapter 2: The EF2915 Series Storage System SAN Overview Example – Fibre Channel SAN Figure 2-1. Fibre Channel SAN Example EF2915 Series User Guide...

  • Page 17: Fibre Channel Overview

    Chapter 2: The EF2915 Series Storage System Fibre Channel Overview Fibre Channel Overview Fibre Channel is a set of standards that defines a layered architecture that transfers data (the layers are referred to in the standards by number such as FC-0). Due to this technology specific numbering scheme, the layer numbers in the Fibre Channel standards do not correspond to the layer numbers in the OSI networking model.

  • Page 18: Who Is Fibre Channel

    These steps provide a brief outline of how data is transferred across a Fibre Channel network as part of the data storage process. A server requests that the data be transferred to an DataDirect Networks storage device, through the Fibre Channel network.

  • Page 19: Fibre Channel Topologies

    Chapter 2: The EF2915 Series Storage System Fibre Channel Overview Fibre Channel Topologies There are three Fibre Channel network topologies, the simplest and least expensive of which is the point-to-point topology. The second topology is the arbitrated loop which is more complex and expensive than point-to-point and offers much more functionality.

  • Page 20: Fibre Channel Standards

    Chapter 2: The EF2915 Series Storage System Fibre Channel Overview • E_Port: An expansion port on a switch that is used to connect to another E_Port on a different switch (this type of connection is used to connect devices to create a large fabric).

  • Page 21: Introduction To Raid Technology

    Chapter 2: The EF2915 Series Storage System Introduction to RAID Technology Introduction to RAID Technology RAID stands for Redundant Array of Independent (or Inexpensive) Disks (or Devices). A RAID system has these basic attributes: • It includes multiple disk drives.

  • Page 22: Raid Level 1

    Chapter 2: The EF2915 Series Storage System Introduction to RAID Technology RAID Level 1 RAID level 1 is best suited for use by database and file servers that require high availability. RAID level 1 uses a technique called mirroring to achieve high data availability. The data...

  • Page 23: Raid Level 3

    Chapter 2: The EF2915 Series Storage System Introduction to RAID Technology Figure 2-4. RAID The characteristics of RAID level 1+0 are summarized in Table 2-4. Table 2-4. Characteristics of RAID Level Advantages Disadvantages Uses High I/O for random read/ Utilization of disk...

  • Page 24: Raid Level 5

    Chapter 2: The EF2915 Series Storage System Introduction to RAID Technology Figure 2-5. RAID Level 3 File System The characteristics of RAID level 3 are summarized in Table 2-5. Table 2-5. Characteristics of RAID Level 3 Advantages Disadvantages Uses Ensures I/O...

  • Page 25: Raid Level 50

    Chapter 2: The EF2915 Series Storage System Introduction to RAID Technology Figure 2-6. RAID Level 5 The characteristics of RAID level 5 are summarized in Table 2-6. Table 2-6. Characteristics of RAID Level 5 Advantages Disadvantages Uses Enhances data availability,...

  • Page 26: Raid Level 6

    Chapter 2: The EF2915 Series Storage System Introduction to RAID Technology The characteristics of RAID level 50 are summarized in Table 2-7. Table 2-7. Characteristics of RAID Level 50 Advantages Disadvantages Uses RAID 50 is more fault Very expensive to...
  • Page 27 Chapter 2: The EF2915 Series Storage System Introduction to RAID Technology The characteristics of RAID level 6 are summarized in Table 2-8. Table 2-8. Characteristics of RAID Level 6 Advantages Disadvantages Uses Perfect solution for mission More complex File and Application servers...

  • Page 28: Key Terms Used In This Guide

    The threshold for determining how many sequential request should be received before the read head is enabled. See readahead. middleware The DataDirect Networks middleware is a daemon program that runs on the manage- ment console to which the RAIDs are connected. EF2915 Series User Guide...
  • Page 29 Chapter 2: The EF2915 Series Storage System Key Terms Used in This Guide parity or checksum Information stored on a disk in RAID levels 3 and 5 and used as a backup in case of disk failure. The parity information, along with the data on the remaining drives, provides complete information and enables the system to reconstruct the data of the failed drive.

  • Page 30: Ef2915 Series Specifications

    Chapter 2: The EF2915 Series Storage System EF2915 Series Specifications EF2915 Series Specifications Lists of the physical, electrical, environmental, interface, SP120/SP125 storage processor, and disk drive specifications for the are shown in Table 2-9. EF2915 Series Table 2-9. EF2915 Series Specifications...
  • Page 31 Chapter 2: The EF2915 Series Storage System EF2915 Series Specifications Storage System Features Standard RAID levels 0, 1, 3, 5, 1+0, 50 and 6. On-line RAID expansion Multiple RAID sets Multiple LUNs Hot swap disk drives Global hot spare disks...

  • Page 32: Chapter 3 Setting Up The Ef2915 Series System

    Chapter Setting Up the EF2915 Series System This chapter explains how to install the EF2915 Series system, test its operation, and make it ready for software configuration. EF2915 Series User Guide...

  • Page 33: Selecting An Installation Location

    • 110 V AC • 220 V AC The EF2915 Series system is designed to operate with single-phase power systems that have a grounded conductor. Note: Contact a qualified electrician or facility manager if you are unsure what type of power is supplied to your building.

  • Page 34: Unpacking The Ef2915

    Chapter 3: Setting Up the EF2915 Series System Unpacking the EF2915 Unpacking the EF2915 Caution: Use care in unpacking the EF2915. It is heavy and tightly packed in protective foam Use the following steps to unpack the EF2915. Place the shipping carton where you will install the system.

  • Page 35: Installing The Ef2915 In A Cabinet Using The Rk12 Kit

    Chapter 3: Setting Up the EF2915 Series System Installing the EF2915 in a Cabinet using the RK12 Kit Installing the EF2915 in a Cabinet using the RK12 Kit The RK12 Kit provides the necessary mounting hardware to install the EF2915 into an RETMA compliant cabinet.
  • Page 36 Chapter 3: Setting Up the EF2915 Series System Installing the EF2915 in a Cabinet using the RK12 Kit Figure 3-1. EF2915 Rackmount Assembly EF2915 Series User Guide...

  • Page 37: Cable Connections

    Chapter 3: Setting Up the EF2915 Series System Cable Connections Cable Connections This section provides information on how to connect your EF2915 in a cabinet and in a stand-alone application to a host computer.The host computer shall have an Ethernet connection to the EF2915 for enclosure management in addition to the fibre channel connection used for data I/O.

  • Page 38: Connecting To Exp2915 Expansion Enclosures

    Chapter 3: Setting Up the EF2915 Series System Cable Connections • UPS must be configured to send event trap to the EF2915. Connecting to EXP2915 Expansion Enclosures • Make fibre channel connections as depicted in. Figure 3-2 Figure 3-2. EF2915 connection to multiple EXP2915’s.

  • Page 39: Setting The Fibre Channel Loop Rate On The Ef2915

    Chapter 3: Setting Up the EF2915 Series System Cable Connections Setting the Fibre Channel Loop Rate on the EF2915 The Fibre Channel loop rate is set using the front panel display and push buttons. The display depicted in Figure 3-3 shows a fibre channel rate setting of 4Gb.
  • Page 40 Chapter 3: Setting Up the EF2915 Series System Cable Connections To change the parameters for the FC loop: 1. Use the Down Arrow and Up Arrow buttons to scroll through the parameter selec- tions. Use the Enter button to select a parameter for modification.

  • Page 41: Serial Port Connection And Configuration

    Chapter 3: Setting Up the EF2915 Series System Cable Connections Serial Port Connection and Configuration You can monitor EF2915 status by using an external terminal attached to the 9-pin, female RS-232C serial port connector. There is a serial port connector on each of the two storage controllers in the enclosure.
  • Page 42 Chapter 3: Setting Up the EF2915 Series System Cable Connections In the configuration window, select port b. Choose the template Initialize Only - No Configuration, and set the Baud rate to 9600. Click Apply to confirm. Edit the file and type the following:...
  • Page 43 Chapter 3: Setting Up the EF2915 Series System Cable Connections Modify the remote file under /etc as shown below. # cd /etc # vi remote # The next 17 lines are for the PCMCIA serial/modem cards. pc0:\ :dv=/dev/cua/pc0:br#38400:el=^C^S^Q^U^D:ie=%$:oe=^D:nt:hf: pc1:\ :dv=/dev/cua/pc1:br#38400:el=^C^S^Q^U^D:ie=%$:oe=^D:nt:hf:...
  • Page 44 Press the < . > key. This quits the cu utility and returns you to the shell prompt. Write down any messages that are displayed and call DataDirect Networks Technical Support for assistance. If there is no raid; or {rmon} prompt, do the following: Strike any key several times, to try to get a response.

  • Page 45: Ip Connection

    IP Connection Note: If a hub or switch is not used, an Ethernet crossover cable must be used to connect from a host to the EF2915. DataDirect Networks does not provide a null- modem cable. Setting the IP Address Use the following steps to set the IP address: Insert the DataDirect Networks Setup CD in a workstation that has Ethernet connec- tivity with the EF2915 and launch the Network Configuration Utility program.
  • Page 46 Chapter 3: Setting Up the EF2915 Series System Cable Connections EF2915 Series User Guide...

  • Page 47: Fibre Channel Connection

    Chapter 3: Setting Up the EF2915 Series System Cable Connections Fibre Channel Connection The fibre channel cables connect the input of the EF2915 to either the Host Bus Adapter ports on a server or to ports on a fibre channel switch that is connected to one or more hosts.

  • Page 48: Enclosure Configuration

    The SAN Manager running on a PC is referred to as the Management PC (MPC). Refer to “Configuring a Management Console” on page 42 below for an introduction to the SAN Manager. Please refer to DataDirect Networks document 801-000001 for the DataDirect Networks Administrator Guide. Using the System Manager A PC or other workstation with a web browser can be used to display the System Manager GUI.

  • Page 49: Configuring A Management Console

    Configuring a Management Console MPC Hardware Description An DataDirect Networks SAN storage system can be monitored and managed using a Solaris workstation or a Windows PC workstation as a management console (MPC). Both in-band and out-of-band monitoring and management are supported.

  • Page 50: Minimum Mpc Requirements

    CDROM drive, run the “setup.exe” program and follow the instructions of the installation wizard to finish the DataDirect Networks SAN Manager software installation. For the Sun Solaris 2.6+ operating system, insert the DataDirect Networks CD in the CDROM drive. At the Solaris system prompt sign, execute the "pkgadd -d /IQSTiqsm"...

  • Page 51: Datadirect Networks San Storage Product Support

    "port" is for the HTTP service port number provided by the server. DataDirect Networks SAN Storage Product Support The DataDirect Networks SAN Manager software that you have successfully installed in the MPC supports the following DataDirect Networks SAN storage products: •...

  • Page 52: Front Panel

    Chapter 3: Setting Up the EF2915 Series System Front Panel Front Panel The EF2915’s disk enclosure contains 15 disk slots. Inspection and replacement of the canisters and disk drives is simple. You can remove and replace any drive from the disk enclosure while the system is running by using the handle at the front of the drive canister.

  • Page 53: Ef2915 Lcd Guide

    Chapter 3: Setting Up the EF2915 Series System Front Panel EF2915 LCD Guide The front panel of the EF2915 Storage System has a Liquid Crystal Display (LCD) and four membrane switches (push buttons). The LCD provides two lines of 16 characters each.
  • Page 54 Chapter 3: Setting Up the EF2915 Series System Front Panel Table 3-6. Information Items Information Items Name, scrolling if more than 16 characters Firmware Version (with version number) Monitor Version (with version number) EMIO PCB Rev. (with number) Chassis WWN (with World Wide Number) Name: Displays the alphabetic name, up to 64 characters, assigned to the enclosure.

  • Page 55: Led Indicators

    Chapter 3: Setting Up the EF2915 Series System LED Indicators LED Indicators Green and amber LEDs on the front panel show system status and drive activity (see Figure 3-9 on page 59 for LED locations). Table 3-7 and Table 3-8 below list LED Indications.

  • Page 56: Rear Panel - Ef2915

    Chapter 3: Setting Up the EF2915 Series System Rear Panel – EF2915 Rear Panel – EF2915 The EF2915 rear panel (Figure 3-6) includes two power supplies, two cooling modules, DB9 serial interfaces, Ethernet port, Fibre Channel ports, EMIO module, one or two SP288 storage processors, and two AC receptacles.

  • Page 57: Sp2Xx Storage Processors

    Chapter 3: Setting Up the EF2915 Series System SP2xx Storage Processors SP2xx Storage Processors The EF2915 has dual Fibre Channel SP2xx storage processors. Each Storage Processor has two Fibre Channel or iSCSI host ports. By using a Fibre Channel Arbitrated Loop, you can interconnect multiple EF2915 and gain additional storage.

  • Page 58: Overview

    Start Up Follow the steps below to start the agent: Start a DOS Shell. Move to the “DataDirect Networks_Agent” directory. To start the agent, issue the following command from the “DataDirect Networks_Agent” directory. java -classpath .\Agent.jar Agent EF2915 Series User Guide...
  • Page 59 Chapter 4: Database Application Agent for Oracle, SQL and Exchange Oracle on a Windows Server Note: The agent needs to restart if the Oracle server reboots. EF2915 Series User Guide...

  • Page 60: Oracle On A Solaris Server

    Start a Shell. Move to the “DataDirect Networks_Agent” directory. To start the agent, issue the following command from the “DataDirect Networks_Agent” directory. java -classpath ./Agent.jar Agent Note: The agent needs to restart if the Oracle server reboots. EF2915 Series User Guide...

  • Page 61: Exchange On A Windows Server

    Agent". The service will be automatically started after installation is finished. Doing Backup 1. Mount a vdisk of the DataDirect Networks Storage System to the host as a volume that can be written and read, such as volume D:. 2. Put all files such as log files and database files of the Exchange Server 2003 on this volume and determine the path to a storage group.

  • Page 62: Doing Restore

    Figure 4-1. Exchange Backup Using SAN Manager Doing Restore 1. Mount the snapshot to the host and manually copy the mailbox and log files from the snapshot drive to the First Storage Group. 2. Mount the First Storage Group. EF2915 Series User Guide...

  • Page 63: Sql Server On Windows

    The DataDirect Networks SQL backup agent will manage the routine backup of SQL by a set policy in SAN Manager (SAN Manager dependent). It is hot backup, and the SQL Server service will not be interrupted during the backup.

  • Page 64: Do Restore

    Chapter 4: Database Application Agent for Oracle, SQL and Exchange SQL Server on Windows Figure 4-2. SQL Backup Using SAN Manager Do Restore Migrate the database backup data files from permanent storage to the original file path: INSTALL_DIR>\ SQLAgent -restore -s <SessID> -b <BkpDBName> EF2915 Series User Guide...
  • Page 65 Chapter 4: Database Application Agent for Oracle, SQL and Exchange SQL Server on Windows EF2915 Series User Guide...

  • Page 66: Chapter 5 Troubleshooting

    No raid; prompt from the EF2915. • Host cannot probe the EF2915 by format command. • DataDirect Networks SAN Manager cannot detect the EF2915 on the Fibre Channel. • SFP connectivity problem. • SP2xx Storage Processor modules do not establish Interlink communications.

  • Page 67: Ef2915 Cannot Be Turned On

    If you see the {rmon} prompt, type b (the boot command). If the raid; prompt appears, type autoboot (the autoboot command). If you cannot get the raid; prompt from the EF2915, write down any messages that appear and call DataDirect Networks Technical Support.

  • Page 68: Datadirect Networks San Manager Cannot Detect The Ef2915 On The Fibre Channel

    Chapter 5: Troubleshooting Problem Indications DataDirect Networks SAN Manager cannot detect the EF2915 on the Fibre Channel Methods of verifying the connectivity of the Fibre Channel link Type "getwwn 1" at the command line • If a message appears with only the SP2xx’s WWNs, this means no Fibre Channel connection is established to other FC devices.

  • Page 69: Sfp Connectivity Problem

    : raid; • If a message appears without 0 0 0 0, an Interlink connection is established : raid; : raid; hwconf 2 1 1 124 134217728 120488064 117331136 67108864 268435456 253974432 250950272 134217728 : raid; EF2915 Series User Guide...
  • Page 70 11:05:15 09/11/02; rrci_pollster(292): Remote controller is now up 11:05:16 09/11/02; Waiting for peer controller ..11:05:16 09/11/02; Syncing Controllers in progress ..[Note: additional lines of output will appear here during the bootup] 11:05:22 09/11/02; Syncing Controllers complete. EF2915 Series User Guide...

  • Page 71: Ethernet Connection Cannot Be Established

    When the raid prompt appears, try issuing the "hwconf" command again and verify that an Interlink connection has been established. If the Interlink connection still cannot be established, please call DataDirect Networks Networks Technical Support for assistance. Ethernet connection cannot be established Verify the cable is properly and securely connected to the RJ45 connector.

  • Page 72: Chapter 6 Servicing The Ef2915 Series System

    Chapter Servicing the EF2915 Series System The EF2915 is fully field-serviceable with modular components. This chapter describes the steps to remove and replace Field Replaceable Units (FRUs) that provide critical system functions. All FRUs are easily accessible from the front or rear of the unit. They include: •...

  • Page 73: Identifying Field Replaceable Units

    Chapter 6: Servicing the EF2915 Series System Identifying Field Replaceable Units Identifying Field Replaceable Units Figure 6-1 shows the EF2915 rear panel and the locations of Field Replaceable Units (FRUs). Table 6-1. Rear Panel Components – EF2915 Callout Description Power Supply 1...

  • Page 74: Inserting Sfps

    Chapter 6: Servicing the EF2915 Series System Inserting SFPs Inserting SFPs The Small Form-factor Pluggable (SFP) is a compact optical transceiver used to couple the optical fiber cable to the fibre channel host adapter in the EF2915 system. They slide into the port openings of the SP2xx processors.

  • Page 75: Replacing A Faulty Disk Drive

    Chapter 6: Servicing the EF2915 Series System Replacing a Faulty Disk Drive Replacing a Faulty Disk Drive The front panel has slide-in trays, each containing one 3.5" disk drive. All drives are hot- swappable: any drive may be removed and inserted while the EF2915 is operating (power on) with no effect on the operation of other drives or the system as a whole.
  • Page 76 Chapter 6: Servicing the EF2915 Series System Replacing a Faulty Disk Drive Holding the handle, align the tray with the slot. Push the tray into the slot until it locks in place. You will hear a “click” as the drive locks into place.

  • Page 77: Removing And Replacing Power Supplies

    Chapter 6: Servicing the EF2915 Series System Removing and Replacing Power Supplies Removing and Replacing Power Supplies Power supplies are hot-swappable: either power supply may be removed and inserted while the EF2915 is operating (power is on) without affecting system operation.

  • Page 78: Replacement

    Chapter 6: Servicing the EF2915 Series System Removing and Replacing Power Supplies Replacement To install a power supply: Align the power supply with the opening on the rear panel. Be sure that the power supply switch is set to OFF.

  • Page 79: Removing And Replacing Processor Modules

    Chapter 6: Servicing the EF2915 Series System Removing and Replacing Processor Modules Removing and Replacing Processor Modules You do not need to remove the top cover to remove and replace the SP2xx processor modules, since they are not swappable. Note: If the system is active, removal of a processor module should be done during scheduled maintenance, unless multi-pathing software is being used on the host.
  • Page 80 Chapter 6: Servicing the EF2915 Series System Removing and Replacing Processor Modules Figure 6-5. Removing an SP22x Processor Module To remove a SP28x processor module: Make sure all of the cables are clearly marked to indicate which connector on the stor- age processor they plug into.

  • Page 81: Processor Memory

    Chapter 6: Servicing the EF2915 Series System Removing and Replacing Processor Modules Figure 6-6. Removing an SP28x Processor Module Processor Memory If it is desired to add memory to an SP2xx processor, make sure that if a single SIMM is used, the SIMM is inserted in socket U2 (the outboard socket).
  • Page 82 Chapter 6: Servicing the EF2915 Series System Removing and Replacing Processor Modules Reconnect the cables to the correct connectors. Verify the storage processor is functioning correctly by checking the status using the DataDirect Networks SAN Manager and LCD. Note: After replacing a storage processor module, you must reconfigure the RAID set on the new storage processor if its configuration is different from that of the original storage processor.

  • Page 83: Removing And Replacing Fan Modules

    Chapter 6: Servicing the EF2915 Series System Removing and Replacing Fan Modules Removing and Replacing Fan Modules The EF2915’s two fans are serviceable from the rear of the unit. Caution: To avoid system damage in case of fan failure, never run the EF2915 for more than minutes without operating either fan.
  • Page 84 Chapter 6: Servicing the EF2915 Series System Removing and Replacing Fan Modules To remove a fan module in the EF2915: Unscrew the screws (Figure 6-7 top). Using the handle, pull out the fan module (Figure 6-7 bottom). Note: The power connector for the fans is hard-mounted to the fan module. Power is disconnected automatically when you pull the module out.

  • Page 85: Replacement

    Chapter 6: Servicing the EF2915 Series System Removing and Replacing Fan Modules Replacement To replace a fan module: Using the handle, align the fan module with the opening on the rear panel. Align the power connector with the plug. Carefully push the module into place.

  • Page 86: Removing And Replacing The Emio Module

    Chapter 6: Servicing the EF2915 Series System Removing and Replacing the EMIO Module Removing and Replacing the EMIO Module The EF2915 has one Enclosure Management Input Output module that is serviceable from the rear of the unit. EF2915 Series User Guide...
  • Page 87 Chapter 6: Servicing the EF2915 Series System Removing and Replacing the EMIO Module To remove the EMIO module from an EF2915: Unscrew the screws (Figure 6-8 top). Using the handle, pull out the fan module (Figure 6-8 bottom). Figure 6-8. Removing the EMIO module from the EF2915...

  • Page 88: Removing And Replacing Battery Module

    Chapter 6: Servicing the EF2915 Series System Removing and Replacing Battery Module Removing and Replacing Battery Module The EF2915 has one battery module that is serviceable from the rear of the unit. To remove the battery module from an EF2915:...
  • Page 89 Chapter 6: Servicing the EF2915 Series System Removing and Replacing Battery Module EF2915 Series User Guide...

  • Page 90: Chapter 7 Glossary

    In a fabric network, the process of identifying other devices in the network. See also Name Server and Loop Initialization. Exchange A set of related, bidirectional sequences that represents a complete I/O operation. See also Sequence. EF2915 Series User Guide...
  • Page 91 Node A device that has at least one N_Port or one NL_Port. NL_Port Node Loop Port. The end node ports in an arbitrated loop. EF2915 Series User Guide...
  • Page 92 See also Point-to-Point and Arbitrated Loop. Word The basic Fibre Channel building block used to construct frames. It consists of four 10-bit bytes. See also Frame and Sequence. EF2915 Series User Guide...
  • Page 93 Chapter 7: Glossary World Wide Name. A unique 64-bit address assigned to a Fibre Channel device during manufacturing. See also Source WWN and Destination WWN. EF2915 Series User Guide...
  • Page 94 21 Environmental requirements 26 exchange (in Fibre Channel) 87 F_Port 88 fabric 88 Fabric Login (FLOGI) 88 Fibre Channel overview 10 terminology 87 Fl_Port 88 front end 21 Front panel 45 glossary Fibre Channel 87 EF2915 Series User Guide...
  • Page 95 SAN overview 7 sequence (in Fibre Channel) 89 sequence count (in Fibre Channel) 89 sequence ID 89 servicing the iQ12xx Series 67 setting up the iQ12xx Series 25 Source WWN 89 Specifications 23 striping 22 transfer rate 22 EF2915 Series User Guide...
  • Page 96 Chapter : Unpacking 27 word (in Fibre Channel) 89 World Wide Name (WWN) 87 EF2915 Series User Guide...
  • Page 97 DataDirect Networks, Inc. Worldwide Corporate 9351 Deering Avenue Chatsworth, CA 91311 +1.818.700.7600 +1.800.TERABYTE (837.2298) +1.818.700.7601 Fax info@datadirectnet.com...

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