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HP Surestore Disk Array 12h - And FC60 Configuration Manual

Operating system configuration guide
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  • Page 1 SGI IRIX hp surestore disk array xp operating system configuration guide...
  • Page 2 Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the Format conventions furnishing, performance, or use of this material.

  • Page 3: Table Of Contents

    CONTENTS About This Manual 5 Revision History 6 Updates 7 SGI IRIX Installation Hardware Installation 9 Remote Console PC and LUN Configuration Manager Installation 10 Preparing for Disk Array Device Configuration 11 Installation Requirements 12 Connectivity Options 12 Device Types 13 Installation Procedures 14 Identify the Available SCSI Paths (XP256 Only) 15 Prepare the Disk Array 16...
  • Page 4 Host Bus Adapter Modes 59 Supported Host Modes Failover and SNMP Remote Disk Array Management Failover Configuration 64 SNMP Configuration 65 Glossary Index hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 5: About This Manual

    About This Manual This manual describes the requirements and procedures for connecting the XP family of disk arrays to an SGI system, and configuring the new disk array for operation with the SGI IRIX operating system. Installation of the HP Surestore Disk Array XP is performed by users with administrator privileges and the HP service representative.

  • Page 6: Revision History

    Revision History 5 May 1999 First release. 1 November 2000 Added Fibre Channel support. July 2001 Updated. hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 7: Updates

    Updates For the most current information about HP Surestore XP products, visit the support web site: www.hp.com/support/stressfree For information about product availability, configuration, and connectivity, consult your HP account representative.
  • Page 8 hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 9: Sgi Irix Installation

    SGI IRIX INSTALLATION The disk array comes with all hardware and cabling required for installation. Installation of the disk array includes these activities: • hardware installation • remote console and LUN Configuration Manager installation Hardware Installation The HP service representative performs hardware installation as specified in the disk array maintenance manual.

  • Page 10: Remote Console Pc And Lun Configuration Manager Installation

    Fabric Connect the disk array port to the F-port of the fabric switch. Connect the host adapter to the FL-port of the fabric switch. Disk Array FC Port The Fibre Channel topology parameters for each disk array Fibre Channel port depend on the type of device to which the disk array port is connected.

  • Page 11: Preparing For Disk Array Device Configuration

    Preparing for Disk Array Device Configuration Before the disk array is connected to the SGI system, you must perform the following tasks: 1. Set the host mode for the disk array SCSI (XP256) and Fibre Channel ports. 2. (Fibre Channel only) Configure the disk array Fibre Channel ports. You use the LUN Configuration Manager Remote Control software to set the host modes for the disk array ports and configure the Fibre Channel ports.

  • Page 12: Installation Requirements

    Installation Requirements To install the disk array on an SGI IRIX system, ensure that the environment conforms to these requirements: • HP Surestore Disk Array XP with SCSI ports (XP256) or Fibre Channel ports The disk array Fibre Channel port must have a Fibre Channel loop ID set that is unique within the Fibre Channel loop.

  • Page 13: Device Types

    The all-open system disk array is configured with all SCSI ports. • Fibre Channel Fibre Channel connections are supported, using a direct connection or using HP Surestore SCSI Bridge FC bridges, hubs, and switches. • multiplatform The multiplatform disk array is configured with serial Enterprise System Connection (ESCON), SCSI ports (XP256 only), or Fibre Channel ports.

  • Page 14: Installation Procedures

    Installation Procedures Installation and configuration of the disk array are composed of the following activities: 1. (XP256 only) Identify the available SCSI paths (page 15). 2. Prepare the disk array (page 16). 3. (XP256 only) Define the SCSI paths (page 19). 4.

  • Page 15: Identify The Available Scsi Paths (Xp256 Only)

    Identify the Available SCSI Paths (XP256 Only) To identify the available SCSI paths: 1. Make sure that all existing SCSI devices are powered on and properly connected to the system. 2. Log in to the system as root. 3. Generate a file containing peripheral device information by entering hinv –v >...

  • Page 16: Prepare The Disk Array

    Prepare the Disk Array To install the disk array, the HP service representative performs the following tasks: 1. Assemble final hardware. 2. Load the microprogram updates for SCSI/Fibre Channel support. 3. Install the SCSI or Fibre Channel adapters and cabling. 4.
  • Page 17 1. Select the appropriate settings for each Fibre Channel port based on the device to which the port is connected. 2. Determine the topology parameters supported by the device, and set your topology accordingly. 3. The type of port is also important. If you plan to connect different types of servers to the array through the same fabric switch, you must use the zoning function of the fabric switch.
  • Page 18 (AL-PA) or loop ID. Table 6 (page 48) shows the available AL-PA values ranging from 01 to EF. Fibre Channel protocol uses the AL-PAs to communicate on the Fibre Channel link, but the software driver of the platform host adapter translates the AL-PA value assigned to the port to a SCSI target ID (TID).

  • Page 19: Define The Scsi Paths (Xp256 Only)

    Define the SCSI Paths (XP256 Only) Use the LUN Configuration Manager feature of the Remote Control software to define the logical unit number (LUN) mapping (SCSI-to-LDEV paths) for the devices on the disk array. If LUN Configuration Manager is not installed, the HP service representative configures the LUN mapping using the disk array’s SVP.

  • Page 20: Connect The Disk Array

    Connect the Disk Array Some SGI systems may require you to use the System Maintenance Menu to start the system. To connect the disk array: 1. Before connecting the disk array, you must shut down and power off the SGI server and all peripheral devices.

  • Page 21: Verify New Device Recognition

    Verify New Device Recognition To verify the system recognizes the devices on the newly installed disk array: 1. Power on the system. 2. Log in to the system as root. 3. Generate a file containing peripheral device information by entering hinv –v >...
  • Page 22 Origin BASEIO board, module 1 slot 1: Revision 4 Origin FIBRE CHANNEL board, module 1 slot 4: Revision 4 Origin FIBRE CHANNEL board, module 1 slot 7: Revision 4 Origin PCI XIO board, module 1 slot 2: Revision 4 IOC3 external interrupts: 1# LUN 0 is implied when no LUN is listed.

  • Page 23: Create The Device Files

    Create the Device Files The SGI IRIX system creates device files for new devices automatically during server startup. IRIX uses the following formats for the device file names. • parallel SCSI and FC-AL /dev/rdsk/dkscontroller#ddrive#{spartition#|vh|vol} /dev/rdsk/dkscontroller#ddrive#llun#{spartition#|vh|vol} /dev/dsk/dkscontroller#ddrive#spartition# /dev/dsk/dkscontroller#ddrive#llun#spartition# Example /dev/rdsk/dks8d0l8s0 • Fibre Channel fabric /dev/rdsk/nodename/lunlun#{spartition#|vh|vol}/ccontroller#pport# /dev/dsk/nodename/lunlun#spartition#/ccontroller#pport# Example...
  • Page 24 NL 0214e4; 3;21:00:00:fa:ce:00:21:e1;20:00:00:fa:ce:00:21:e1; na FC4s: FCP [STOREX RS2999FCPH3 CD09] NL 0214e8; 3;21:00:00:fa:ce:04:83:c9;20:00:00:fa:ce:04:83:c9; na FC4s: FCP [STOREX RS2999FCPH3 NS09] Used as WWN on IRIX NL 0214ef; 3;21:00:00:ad:bc:04:6f:70;20:00:00:ad:bc:04:6f:70; na FC4s: FCP [STOREX RS2999FCPH3 JB09] To create the device files: 1. Go to the /dev directory by entering cd /dev 2.
  • Page 25 Example # cd /dev/rdsk # ls -l dks4d* crw------- 1 root 128,1088 Apr 7 12:18 dks4d4s0 crw------- 1 root 128,1089 Apr 7 12:18 dks4d4s1 crw------- 1 root 128,1103 Apr 7 12:18 dks4d4s15 crw------- 1 root 128,1095 Apr 7 12:18 dks4d4s7 You can restrict the display to find only the new devices rather than all devices.

  • Page 26: Partition And Label The Devices

    Partition and Label the Devices After new device recognition has been verified, you need to partition the new SCSI disk devices using the fx utility. When the disk array is connected through a fabric switch, you must specify the device file when starting the fx utility. After setting the partitions for a device, verify the partitions using the prtvtoc command.
  • Page 27 Enter y to continue Continue? y Enter .. when done Enter partition number fx/repartition/expert: change partition = (0) 0 before: type xfs block 266240, 130 MB len: 4540416 blks, 2217 MB Enter partition type fx/repartition/expert: partition type = (xfs) xfs Enter min partition size fx/repartition/expert: base in megabytes = (130) 2 Enter max partition size...
  • Page 28 ...drive selftest...OK Scsi drive type == HITACHI OPEN-3 5245 ----- please choose one (? for help, .. to quit this menu)----- [exi]t [d]ebug/ [l]abel/ [a]uto [b]adblock/ [exe]rcise/ [r]epartition/ fx> r 2. Use the prtvtoc command to verify the partition configuration. prtvtoc /dev/dsk/dks8d0115s0 Partition number Target ID...

  • Page 29: Enable Command Tag Queuing

    Enable Command Tag Queuing SCSI command tag queuing must be enabled to optimize the performance of the disk array devices. Because command tag queuing is disabled by default in IRIX, you must enable it and set the queue depth for each disk array logical device (including Data Exchange devices) using the fx utility.
  • Page 30 fx/label/set/parameters: Auto bad block reallocation (write) = (enabled) fx/label/set/parameters: Auto bad block reallocation (read) = (enabled) fx/label/set/parameters: Read ahead caching = (enabled) fx/label/set/parameters: Write buffering = (enabled) fx/label/set/parameters: Drive disable prefetch = (0) fx/label/set/parameters: Drive minimum prefetch = (0) fx/label/set/parameters: Drive maximum prefetch = (0) fx/label/set/parameters: Drive prefetch ceiling = (0) Enter enable fx/label/set/parameters: Enable CTQ = (disabled) enable...

  • Page 31: Create The File Systems

    Create the File Systems Create a file system for each new OPEN-K/3/8/9/E device. To overcome the size and speed limitations of a standard file system (EFS), it is possible to create an extended file system (XFS). The EFS file system creates one file system of 2 GB or less on a single device without the extended logical volume manager (XLV).

  • Page 32: Create And Verify The Mount Directories

    Create and Verify the Mount Directories Do not create mount directories for multiplatform devices. Caution To create and verify the mount directories: 1. Create a mount directory by using the mkdir command. For example, to create a mount directory for logical unit 0 on the disk array, partition c, enter mkdir HP5700_LU0c 2.

  • Page 33: Register, Mount, And Verify The File Systems

    Register, Mount, and Verify the File Systems To register the new file systems in the mount table: 1. Make a backup copy of the mount table by entering cp /etc/fstab /etc/fstab.backup 2. Edit the file /etc/fstab by using the vi editor. Example # cp /etc/fstab /etc/fstab.backup...
  • Page 34 The default display for drive capacity is 512-byte blocks. To view the capacity of the drives in kilobytes rather than in 512-byte blocks, enter df –k Example # df -k File system Type Kbytes avail %use Mounted on /dev/root 969857 414702 555155 /dev/dsk/dks8d0l13s0...

  • Page 35: Troubleshooting

    TROUBLESHOOTING If the system has an error condition, see Table 1 for recommended actions. If you are unable to resolve an error condition, ask your HP service representative for assistance. Table 1. Error Conditions Error Condition Recommended Action The logical devices are not Be sure the READY indicator lights on the disk array are ON.

  • Page 36: Calling The Hp Support Center

    Calling the HP Support Center If you need to call HP customer support, make sure to provide as much information about the problem as possible, including the circumstances surrounding the error or failure and the exact content of any error messages displayed on the host system. If the HP Surestore Remote Control XP software product is installed on a remote console PC, check the R-SIM window and note the reference codes and severity levels of recent R-SIMs.

  • Page 37: Scsi Path Worksheet

    SCSI PATH WORKSHEET A SCSI path worksheet is provided on the next page.
  • Page 38 Table 1. SCSI Path Worksheet LDEV (CU:LDEV) Device SCSI Bus (CU = control unit) Type Number Path 1 Alternate Paths 0:00 TID: TID: TID: LUN: LUN: LUN: 0:01 TID: TID: TID: LUN: LUN: LUN: 0:02 TID: TID: TID: LUN: LUN: LUN: 0:03 TID:...

  • Page 39: Disk Parameters

    DISK PARAMETERS Table 1 through Table 5 (page 44) describe the parameter values used in the installation process. These tables are referenced from the installation procedure. Table 1. Value of Parameters for ddr_dbase Disk Type Tag Queue Depth Number of LUNs × queue depth ≤ 256 and queue depth ≤ 32 OPEN-K/3/8/9/E Table 2.
  • Page 40 Table 2. Parameter Values of the OPEN-3 Disk Types (continued) Disk Type OPEN-3* OPEN-3 CVS* Parameter =2 to 36) OPEN-3 OPEN-3 CVS to 36) od d partition offset Set optionally Set optionally Set optionally Set optionally (Starting block in d partition) oe e partition offset Set optionally Set optionally Set optionally Set optionally...
  • Page 41 Table 2. Parameter Values of the OPEN-3 Disk Types (continued) Disk Type OPEN-3* OPEN-3 CVS* Parameter =2 to 36) OPEN-3 OPEN-3 CVS to 36) e partition fragment size 1,024 1,024 1,024 Set optionally f partition fragment size 1,024 1,024 1,024 1,024 g partition fragment size 1,024...
  • Page 42 Table 3. Parameter Values of the OPEN-8 Disk Types (continued) Disk Type OPEN-8* OPEN-8 CVS* =2 to 36) Parameter OPEN-8 OPEN-8 CVS to 36) pa a partition size Set optionally Set optionally Set optionally Set optionally pb b partition size Set optionally Set optionally Set optionally Set optionally pc c partition size...
  • Page 43 Table 4. Parameter Values of the OPEN-9 Disk Types Disk Type OPEN-9* Parameter OPEN-9 CVS* =2 to 36) OPEN-9 OPEN-9 CVS to 36) Disk category Winchester Winchester Winchester Winchester Control type SCSI SCSI SCSI SCSI Sectors/tracks Tracks/cylinder nc Number of all cylinders 10,016 10,016*n Depends on...
  • Page 44 Table 4. Parameter Values of the OPEN-9 Disk Types (continued) Disk Type OPEN-9* OPEN-9 CVS* Parameter =2 to 36) OPEN-9 OPEN-9 CVS to 36) ph h partition size Set optionally Set optionally Set optionally Set optionally ba a partition block size 8,192 8,192 8,192...
  • Page 45 Table 5. Parameter Values of the OPEN-K (XP256 only) Disk Types (continued) Disk Type OPEN-K* OPEN-K CVS* Parameter =2 to 36) OPEN-K OPEN-K CVS to 36) rm Number of rotations of the disk 6,300 6,300 Set optionally 6,300 oh h partition offset Set optionally Set optionally Set optionally Set optionally (Starting block in h partition)
  • Page 46 Notes for Table 1 Through Table 5 1. The value of pc is calculated as follows: pc = nc * nt * ns The nc of OPEN-K/3/8/9/E CVS corresponds to the capacity specified by SVP or remote console. The CVS size of OPEN-K/3/8/9/E is specified by capacity (megabyte), not by number of cylinders.

  • Page 47: Scsi Tid Map For Fibre Channel Adapters

    SCSI TID Map for Fibre Channel Adapters When an arbitrated loop (AL) is established or reestablished, the port addresses are assigned automatically to prevent duplicate TIDs. With the SCSI over Fibre Channel protocol (FCP), there is no longer a need for target IDs in the traditional sense. SCSI is a bus-oriented protocol requiring each device to have a unique address since all commands go to all devices.
  • Page 48 Table 6. AL-PA to SCSI TID Mapping (t value) AL-PA t value AL-PA t value AL-PA t value AL-PA t value AL-PA t value AL-PA t value AL-PA t value AL-PA t value – hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 49: Byte Information Table

    Byte Information Table Table 7. Byte Information Category LU Product Name Number of Bytes per Inode OPEN-3 OPEN-3 4096 OPEN-3*2-OPEN-3*28 OPEN-3*29-OPEN-3*36 8192 OPEN-8 OPEN-8 4096 OPEN-8*2-OPEN-8*9 OPEN-8*10-OPEN-8*18 8192 OPEN-8*19-OPEN-8*36 16384 OPEN-9 OPEN-9 4096 OPEN-9*2-OPEN-9*9 OPEN-8*10-OPEN-8*18 8192 OPEN-8*19-OPEN-8*36 16384 OPEN-3/8/9/K CVS OPEN-3 CVS 4096 OPEN-9 CVS...

  • Page 50: Queue Depth Parameters Table

    Queue Depth Parameters Table Table 8. Queue Depth Parameters Type Parameter Name Default Value Required Value for Disk Array SCSI Read/write time-out 30 Queue depth (For LUSE devices, use 2 for each LUN. For example, if one LUSE device contains 8 LUNs, use 2 × 8 = 16 for the queue depth.) Queue type None...

  • Page 51: Parameter Tables For Open-K/3/8/9/E Devices

    Parameter Tables for OPEN-K/3/8/9/E Devices Table 9. Parameters for OPEN-K/3/8/9/E Devices Disk Type Parameters for OPEN-K/3/8/9/E OPEN-K OPEN-3 OPEN-8 OPEN-9 OPEN-E Usage SCSI disk SCSI disk SCSI disk SCSI disk SCSI disk Vendor name Product name OPEN-K OPEN-3 OPEN-8 OPEN-9 OPEN-E Number of blocks (512-byte block) 3661920 4806720...
  • Page 52 Table 10. Parameters for OPEN-K/3/8/9/E Devices Disk Type Parameters OPEN-K/3/8/9/E*n OPEN-K*n OPEN-3*n OPEN-8*n OPEN-9*n OPEN-E*n Usage LU size LU size LU size LU size LU size expansion expansion expansion expansion expansion Vendor name Product name OPEN-K*n OPEN-3*n OPEN-8*n OPEN-9*n OPEN-E*n Number of blocks (512-byte block) 361920*n 4806720*n 14351040*n...
  • Page 53 Table 11. Parameters for OPEN-K/3/8/9/E Devices Disk Type Parameters for OPEN-K/3/8/9/E CVS OPEN-K CVS OPEN-3 CVS OPEN-8 CVS OPEN-9 CVS OPEN-E CVS Usage SCSI disk SCSI disk SCSI disk SCSI disk SCSI disk Vendor name Product name OPEN-K-CVS OPEN-3-CVS OPEN-8-CVS OPEN-9-CVS OPEN-E-CVS Number of blocks (512-byte block) See Note 4 Sector size (byte) Number of data cylinders...
  • Page 54 Table 12. Parameters for OPEN-K/3/8/9/E Devices Disk Type Parameters for OPEN-K/3/8/9/E CVS*n OPEN-K CVS*n OPEN-3 CVS*n OPEN-8 CVS*n OPEN-9 CVS*n OPEN-E CVS*n Usage CVS LUSE CVS LUSE CVS LUSE CVS LUSE CVS LUSE Vendor name Product name OPEN-K*n-CVS OPEN-3*n-CVS OPEN-8*n-CVS OPEN-9*n-CVS OPEN-E*n-CVS Number of blocks [Note 4]*n (512-byte block)
  • Page 55 where: [Note 6] = number of cylinders of LUSE composed by OPEN-K/3/8/9/E CVS volumes specified by SVP or remote console. [Note 5] = number of cylinders of OPEN-K/3/8/9/E CVS specified by SVP or the remote console. [Note 4] = number of blocks of CVS volumes calculated by: [Note 5] ×...
  • Page 56 5. The value of [Note 5] is the number of cylinders of OPEN-K/3/8/9/E CVS corresponding to the capacity specified by the SVP or the remote console. The CVS size of OPEN-K/3/8/9/E is specified by capacity in megabytes, not by the number of cylinders.

  • Page 57: Physical Partition Size Table

    Physical Partition Size Table Table 13. Physical Partition Size Category LU Product Name Physical Partition Size in Megabytes OPEN-K OPEN-K OPEN-K*2 OPEN-K*3 to OPEN-K*4 OPEN-K*5 to OPEN-K*9 OPEN-K*10 to OPEN-K*18 OPEN-K*19 to OPEN-K*36 OPEN-3 OPEN-8*2 OPEN-8*3 to OPEN-8*4 OPEN-8*5 to OPEN-8*9 OPEN-3*7-t to OPEN-3*13 OPEN-3*14 to OPEN-3*27 OPEN-3*28 to OPEN-3*36...
  • Page 58 Table 13. Physical Partition Size (continued) Category LU Product Name Physical Partition Size in Megabytes OPEN-K/3/8/9/E*n CVS 35 to1800 1801 to 2300 2301 to 7000 7001 to 16200 13201 to 32400 32401 to 64800 64801 to 126000 1281 126001 on hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 59: Host Bus Adapter Modes

    Host Bus Adapter Modes Supported HBA for XP connectivity is QLA 2200F. Disk Parameters...
  • Page 60 hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 61: C Supported Host Modes

    SUPPORTED HOST MODES Host Mode for XP is to be set at 04 for SGI IRIX.
  • Page 62 hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 63: D Failover And Snmp Remote Disk Array Management

    FAILOVER AND SNMP REMOTE DISK ARRAY MANAGEMENT The user is responsible for configuring the failover and SNMP management software on the UNIX/PC server host. For assistance with failover and/or SNMP configuration on the host, please refer to the user documentation, or contact the vendor’s technical support.

  • Page 64: Failover Configuration

    Failover Configuration The disk array supports industry-standard products and functions which provide host failover, application failover, I/O path failover, and logical volume management (LVM). For the SGI IRIX environment, the disk array currently supports the following products and functions (please contact your HP service representative for the latest information): •...

  • Page 65: Snmp Configuration

    SNMP Configuration The disk array also supports the industry-standard simple network management protocol (SNMP) for remote disk array management from the UNIX/PC server host. SNMP is a part of the TCP/IP protocol suite that supports maintenance functions for storage and communication devices. The disk array uses SNMP to transfer status and management commands to a PC server or open-system host through the remote console PC.
  • Page 66 hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 67: Glossary

    GLOSSARY HP Surestore Asynchronous Continuous Access XP. Array control processor. The ACP handles the passing of data between the cache and the physical drives held in the DKUs. ACPs work in pairs, providing a total of 8 SCSI buses. Each SCSI bus associated with one ACP is paired with a SCSI bus on the other ACP pair element.
  • Page 68 The XP array family supports between 1–16 GB of cache memory. In the event of power loss, the contents of the cache boards are battery backed to survive up to 48 hours. Common desktop environment. Customer engineer. Cache fast write. Channel.
  • Page 69 DASD Direct access storage device. Dynamic cache residency (also called Cache LUN XP). HP Surestore Data Exchange XP. DFDSS Data Facility Dataset Services. DFSMS Data Facility System Managed Storage. DASD fast write. disk adapter (DKA) Synonymous with the term ACP. disk controller unit The disk controller unit (DKC) refers to the array hardware which houses the channel (DKC)
  • Page 70 Emergency power-off. EREP Error reporting. Enterprise Systems Architecture. ESCON Enterprise System Connection (the IBM trademark for optical channels). expanded LUN A LUN is normally associated with only a single LDEV. The LUN Size Expansion (LUSE) feature allows a LUN to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible for applications to access a single large pool of storage.
  • Page 71 For example, mode 18 represents Fast Wide SCSI protocol support on an HP-UX host. hot standby Using two or more servers as a standby in case of a primary server failure. Hewlett-Packard Company. Hardware. Hertz. International Business Machines Corporation.
  • Page 72 Local area network. Pound. Local control port. LD, LDEV Logical device. An LDEV is created when a RAID group is carved into pieces according to the selected host emulation mode (that is, OPEN-3, OPEN-8, or OPEN-9). The number of resulting LDEVs depends on the selected emulation mode. The term LDEV is often used synonymously with the term volume.
  • Page 73 mutual hot standby Two servers that are poised to cover for each other if necessary. system Multiple Virtual Storage (including MVS/370, MVS/ESA, MVS/XA). NHAS Novell High Availability Server. node Logically speaking, an environment where instances can be executed. Physically, a processor, which is an element of a cluster system.
  • Page 74 R&S Russel & Stoll. RAID Redundant array of inexpensive disks. RAID Group A RAID group is a mode of disk operation and configuration. RAID groups 1 to 5 vary in the number of bits used in data/parity encoding, mirroring, and striping features. You may occasionally see the term parity group used synonymously with RAID group.
  • Page 75 SNMP Simple Network Management Protocol. special files Files that indicate physical devices and are different from regular files in the UNIX system. The functions of the device drivers (that is, access to system peripherals) become available through these special files. SSID Storage subsystem identification.
  • Page 76 hp surestore disk array xp operating system configuration guide: SGI IRIX...

  • Page 77: Index

    INDEX command tag queuing host bus adapters enabling 29 modes 59 cylinders host modes calculating for disk volume 46 supported 61 ddr_dbase installation parameter values 39 parameter values 39 devices IRIX operating system file formats 23 disk array requirements 12 IRIX configuration 11 installation procedures 14 partitioning 26...
  • Page 78 SCSI paths defining (IRIX) 19 IRIX 15 SGI IRIX installation troubleshooting 35 support center calling 36 troubleshooting installation for SGI IRIX 35 hp surestore disk array xp operating system configuration guide: SGI IRIX...
  • Page 79 Address: ZIP: City & State: Country: ___ Check here if you would like a reply. Hewlett-Packard has the right to use submitted suggestions without obligation, with all such ideas becoming the property of Hewlett-Packard. XPSO Roseville Information Engineering A5951-96071 E1100...
  • Page 80 UNITED STATES BUSINESS REPLY MAIL FIRST CLASS MAIL PERMIT NO. 256 ROSEVILLE, CA POSTAGE WILL BE PAID BY ADDRESSEE Attention: Information Engineering (MS 5668) Hewlett-Packard Company 8000 Foothills Blvd. Roseville, CA 95747-9987 b595196050b Fold Here Tape Please Do Not Staple...

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