Compaq HSG80 - StorageWorks RAID Array Controller Especificaciones

HSG80 Array Controller ACS Version 8.4Configuration and CLI Reference GuideFirst Edition (April, 1999)Part Number EK-HSG84-RG. A01/118619-001Compaq Co

x SET unit-number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–126SHOW . . . . . . . . . . .

4–20 Planning Storagesets Figure 4–8. Striping and Mirroring in the Same StoragesetThe failure of a single disk drive has no effect on this stor

4–21Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCloning Data for BackupUse the CLONE utility to duplicate the d

4–22 Planning Storagesets Figure 4–9. CLONE Steps for Duplicating Unit MembersTo clone a single-disk unit, stripeset, or mirrorset:1. Establish

4–23Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide3. When prompted, enter the unit number of the unit you want to

4–24 Planning Storagesets DISK10300(size=832317) (y,n) [y] ? y MIRROR DISK10300 C_MA SET C_MA NOPOLICY SET C_MA MEMBERS=2 SET C_MA REPLACE=DISK22

4–25Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDISK20000(size=832317) (y,n) [y] ? y MIRROR DISK20000 C_MB SET

4–26 Planning Storagesets Backing Up Your Subsystem ConfigurationYour controller stores information about your subsystem configuration in its non

4–27Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSaving Subsystem Configuration Information to Multiple DisksYou

4–28 Planning Storagesets Displaying the Status of the Save Configuration FeatureYou can use the SHOW THIS_CONTROLLER FULL command to find out if

4–29Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCACHE_FLUSH_TIMER = DEFAULT (10 seconds)Mirrored Cache:Not enab

xiCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFiguresThe HSG80 Subsystem . . . . . . . . . . . . . . . . . . .

4–30 Planning Storagesets Creating a Storageset MapConfiguring your subsystem will be easier if you know how the storagesets correspond to the di

4–31Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFigure 4–10. Storageset MapPower SupplySpare spare Spare R1R1

4–32 Planning Storagesets To create a storageset map:1. Copy the template from Figure 4–11.2. Establish a local or remote connection to one of th

4–33Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFigure 4–11. Storageset Map TemplatePower SupplyPower SupplyPo

4–34 Planning Storagesets Planning PartitionsUse partitions to divide a storageset or disk drive into smaller pieces, which can each be presented

4–35Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideAn unpartitioned storage unit has more capacity than a partitio

4–36 Planning Storagesets Choosing Switches for Storagesets and DevicesDepending upon the kind of storageset or device you are configuring, you c

4–37Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideRAIDset SwitchesYou can enable the following switches to contro

4–38 Planning Storagesets RECONSTRUCT=NORMAL (default) balances the overall performance of the subsystem against the need for reconstructing th

4–39Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideMirrorset SwitchesYou can enable the following switches to cont

xii CLONE Steps for Duplicating Unit Members . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–22Storageset Map . . . . . . . . . . . . . . .

4–40 Planning Storagesets COPY=FAST allocates more resources to reconstructing the replacement disk drive, which may reduce the subsystem’s ove

4–41Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDevice SwitchesWhen you add a disk drive or other storage devic

4–42 Planning Storagesets Transportable devices have these characteristics:❏ Can be interchanged with any SCSI interface that does not use the de

4–43Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideInitialize SwitchesYou can enable the following kinds of switch

4–44 Planning Storagesets Increasing the Request RateA large chunk size (relative to the average request size) increases the request rate by allo

4–45Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideIncreasing the Data Transfer RateA small chunk size relative to

4–46 Planning Storagesets Maximum Chunk Size for RAIDsetsDo not exceed the chunk sizes shown in Table 4–5 for a RAIDset. (The maximum chunk size

4–47Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide SAVE_CONFIGURATION allows the controller to use 256K of each

4–48 Planning Storagesets If you previously configured storagesets with the SAVE_CONFIGURATION option, you do not need to initialize them again

4–49Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDestroy/NodestroySpecify whether to destroy or retain the user

xiiiCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideTablesKey to Figure 1–1 The HSG80 Subsystem . . . . . . . . .

5–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChapter 5Configuring an HSG80 Array ControllerThis chapter expla

5–2 Configuring an HSG80 Array Controller Figure 5–1. Configuration ProcessSingle ControllerTransparent Failover ModeMultiple-Bus Failover Mode“

5–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideIntroductionUnless you specifically requested a preconfigured su

5–4 Configuring an HSG80 Array Controller Configuring and Cabling an HSG80 Array ControllerYou can use these procedures to configure and cable yo

5–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideTipsAs you configure the controller, keep these points in mind:

5–6 Configuring an HSG80 Array Controller Configuring a Single ControllerFollow these steps to configure an HSG80 array controller:NOTE: This pr

5–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide7. Set the time on the controller, which provides a baseline for

5–8 Configuring an HSG80 Array Controller Connecting a Single Controller to the HostFor a detailed description of the controller and cables, see

5–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideBefore cabling, note the following: Ports❏ The active ports are

xiv Key to Figure 5–7 Example Cabling in Multiple-Bus Failover:Configuration 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–10 Configuring an HSG80 Array Controller Using One SwitchFigure 5–3. Example Cabling for a Single Configuration using One SwitchCXO6880A15324T

5–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideBefore cabling, note the following: Ports❏ The active ports ar

5–12 Configuring an HSG80 Array Controller Configuring in Transparent Failover ModeYou can configure dual-redundant controllers to your hosts wit

5–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide7. Put “this controller” into transparent failover mode. Use th

5–14 Configuring an HSG80 Array Controller 11. Enter any other optional CLI commands for your configuration. See “Optional Steps,” page 5–29 and

5–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFigure 5–4. Example Cabling in Transparent Failover using Two

5–16 Configuring an HSG80 Array Controller The following steps show how to connect a pair of dual-redundant controllers to the host using two swi

5–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide5. Connect the host bus cable between the switches and the host

5–18 Configuring an HSG80 Array Controller Figure 5–5. Example Cabling for Transparent Failover with One SwitchCXO6836A1264355Table 5–4. Figure

5–19Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideThe following steps show how to connect a pair of dual-redundan

xvCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideAbout This GuideThis book describes the features of the HSG80 arr

5–20 Configuring an HSG80 Array Controller Configuring in Multiple-Bus Failover ModeIMPORTANT: If you are using HSG80 ACS V8.4P code, see the Da

5–21Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide6. On OpenVMS hosts only, change the SCSI version to SCSI-3 mod

5–22 Configuring an HSG80 Array Controller 11. Set up the battery discharge timer:a. Start Frutil using the following command:RUN FRUTILFrutil di

5–23Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideConnecting in Multiple-Bus Failover Mode to the HostsIMPORTANT:

5–24 Configuring an HSG80 Array Controller Figure 5–6. Example Cabling in Multiple-Bus Failover: Configuration 1CXO6838A12436655Table 5–5. Key

5–25Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideBefore cabling, note the following: Ports❏ All ports are activ

5–26 Configuring an HSG80 Array Controller 7. Turn on the subsystem.Some operating systems may require you to start the host to see the devices a

5–27Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideBefore cabling, note the following: Ports❏ All ports are activ

5–28 Configuring an HSG80 Array Controller 5. Connect the host bus cable between the switches and the host adapters.IMPORTANT: Cables going into

5–29Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideOptional StepsFollowing are some of the more common steps that

xvi About This Guide PrecautionsFollow these precautions when carrying out the procedures in this book.Electrostatic Discharge PrecautionsStatic

5–30 Configuring an HSG80 Array Controller Figure 5–8. SCSI Target ID Numbers on the Controller Device Bus and PVA Settings in an Extended Subsy

5–31Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSetting a Port OfflineNOTE: By default, all ports are online a

5–32 Configuring an HSG80 Array Controller Changing the Host Default ValueBy default, the host is Windows NT. However, when two or more of the sa

5–33Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideEstablishing a Local Connection to the ControllerYou can commun

5–34 Configuring an HSG80 Array Controller Figure 5–9. Terminal to Local-Connection Port Connection CXO6476B1 2 3 4 5 621Table 5–7. K

5–35Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCAUTION: The local-connection port described in this book gene

5–36 Configuring an HSG80 Array Controller Shutting Down Your SubsystemFollow these steps to shut down your StorageWorks subsystem:1. On the host

5–37Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideRestarting Your SubsystemFollow these steps to restart your sub

6–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChapter 6Configuring StoragesetsThis chapter shows you how to co

xviiCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideMaintenance Port PrecautionsThe maintenance port generates, use

6–2 Configuring StoragesetsConfiguring Storagesets with CLI CommandsOne method of configuring storagesets is manual configuration. This method all

6–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideAdding Disk DrivesThe factory-installed devices in your StorageW

6–4 Configuring Storagesets If the power fails or the bus is reset while HSUTIL is formatting a disk drive, the drive may become unusable. To min

6–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide2. DEVICE_CODE_LOAD_DISK3. DEVICE_CODE_LOAD_TAPEENTER FUNCTION N

6–6 Configuring StoragesetsConfiguring a StripesetSee “Using Striped Mirrorsets for Highest Performance and Availability,” page 4–19, for informat

6–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideThe following example shows the commands you would use to create

6–8 Configuring Storagesets1–9999. Usually, this number is the same as the unit number set in step 3.SET unit-number identifier=nnnn4. Verify the

6–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide2. Initialize the RAIDset. Optional: If you want to set the Init

6–10 Configuring StoragesetsChapter 7, “CLI Commands,” contains more information on valid switches and values for configuring a RAIDset.Configurin

6–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide6. Verify the unit configuration and switches. Use the followin

xviii About This Guide Attention!Ceci est un produit de Classe A. Dans un environnement domestique, ce produit risque de créer des interférences

6–12 Configuring StoragesetsConfiguring a Single-Disk UnitFollow these steps to use a single disk drive as a single-disk unit in your subsystem:1.

6–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuidePartitioning a Storageset or Disk DriveSee “Planning Partitions

6–14 Configuring StoragesetsUse the following command to present partitions to the host:ADD UNIT unit-number storageset-name PARTITION=partition-n

6–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideADD UNIT D1 Raid1 PARTITION=1ADD UNIT D2 Raid1 PARTITION=2ADD U

6–16 Configuring Storagesets2. Verify the contents of the spareset using the following command:SHOW SPARESETExampleThe following example shows the

6–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideExampleThe following example shows the commands you would use t

6–18 Configuring StoragesetsDeleting a StoragesetIf the storageset you are deleting is partitioned, you must delete each partitioned unit before y

6–19Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChanging Switches for a Storageset or DeviceYou can optimize a

6–20 Configuring StoragesetsChanging Initialize SwitchesThe Initialize switches cannot be changed without destroying the data on the storageset or

6–21Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideConfiguring with the Command Console LUNThe Command Console LUN

xixCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideTypographical ConventionsConvention MeaningALLCAPS Command synt

6–22 Configuring StoragesetsTo turn it off, use the following command:SET THIS_CONTROLLER NOCOMMAND_CONSOLE_LUNCAUTION: Disabling the CCL while S

6–23Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideMultiple-Bus FailoverIf SET MULTIBUS_FAILOVER is enabled, all p

6–24 Configuring StoragesetsCAUTION: Selecting SCSI-3 mode enables access to the CCL by all hosts. If the hosts access the CCL simultaneously, un

6–25Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideMoving StoragesetsYou can move a storageset from one subsystem

6–26 Configuring StoragesetsUse the following procedure to move a storageset while maintaining the data it contains:1. Show the details for the st

6–27Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide7. Add again each disk drive to the controller’s list of valid

6–28 Configuring Storagesets(...move the disk drives to their new location...)ADD DISK DISK20000 2 0 0ADD DISK DISK30000 3 0 0ADD DISK DISK40000 4

7–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChapter 7CLI CommandsCommand Line Interpreter (CLI) commands all

7–2 CLI Commands CLI OverviewThe Command Line Interpreter (CLI) is one of the user interfaces through which you control your StorageWorks array c

7–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCommand OverviewThe CLI consists of six basic command types: Co

While Compaq Computer Corporation believes the information included in this publication is correct as of the date of publication, it is subject to cha

xx About This Guide Special NoticesThis book doesn’t contain detailed descriptions of standard safety procedures. However, it does contain warnin

7–4 CLI Commands Entering CLI CommandsUse the following tips and techniques when entering CLI commands: Commands are not case sensitive. For mo

7–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChanging the CLI PromptYou can change the CLI prompt that displa

7–6 CLI Commands ADD CONNECTIONSAdds the specified host connection to the table of known connections. This table is maintained in NVRAM. The maxi

7–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideNOTE: The default connection name is assigned automatically by

7–8 CLI Commands In transparent failover mode and normal mode, host connections on controller port 1 have an offset of 0 and host connections on

7–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideExamplesThis will add to the table of known connections, an entr

7–10 CLI Commands ADD DISKNames a disk drive and adds it to the controller’s configuration.NOTE: The controller supports a maximum of 72 storage

7–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSwitchesNOTRANSPORTABLE (Default)TRANSPORTABLEIndicates whether

7–12 CLI Commands ExamplesTo add DISK10000 at port 1, target 0, LUN 0, type:ADD DISK DISK10000 1 0 0To add DISK40200 as a transportable disk driv

7–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideADD MIRRORSETNames a mirrorset and adds it to the controller co

xxiCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideRelated PublicationsThe following table lists some of the docume

7–14 CLI Commands Specify COPY=FAST to allow the creation of mirrored data to take precedence over other controller operations. When you specify

7–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSpecify the READ_SOURCE=disk-name of a specific member to which

7–16 CLI Commands See alsoADD DISKADD UNITDELETE container-nameINITIALIZEMIRRORREDUCESHOW mirrorset-nameSHOW MIRRORSETSSHOW STORAGESETSUNMIRROR

7–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideADD RAIDSETNames a RAIDset and adds the RAIDset to the controll

7–18 CLI Commands SwitchesPOLICY=BEST_FITPOLICY=BEST_PERFORMANCE (Default)NOPOLICYSet the selection criteria the controller uses to choose a repl

7–19Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSpecify NORMAL to balance other controller operations with the

7–20 CLI Commands ADD UNIT D70 RAID8This example shows how you can create a three-member RAIDset from the members of a reduced four-member RAIDse

7–21Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideADD REMOTE_COPY_SETSIMPORTANT: This command works in a remote

7–22 CLI Commands The combined initiator unit-name target path-name must be typed as follows: initiator unit name controller pair name\remote un

7–23Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideADD SPARESETAdds a disk drive to the spareset.SyntaxADD SPARESE

xxii About This Guide Compaq StorageWorks RA8000/ESA12000 HSG80 V8.x Quick Setup Guidefor OpenVMSfor DIGITAL UNIXfor Windows NT Server - IntelAA-

7–24 CLI Commands ADD STRIPESETNames a stripeset and adds it to the controller configuration. Stripesets are sometimes referred to as RAID level

7–25Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideExamplesTo create a stripeset named STRIPE1 with three disks: D

7–26 CLI Commands See alsoADD UNITADD MIRRORSETDELETE container-nameINITIALIZESHOW STORAGESETSHOW STRIPESETSHOW stripeset-name

7–27Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideADD UNITCreates a logical unit from a device, container, or par

7–28 CLI Commands In transparent failover mode, adding unit D0 creates a logical unit and presents it as D0 to the host on port 1. Adding unit D1

7–29Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideNOTE: Regardless of the storageset type, you cannot specify RU

7–30 CLI Commands If you enable another host ID, previously enabled hosts are not disabled. The new IDs are added. If you wish to enable only cer

7–31Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuidePREFERRED_PATH=OTHER_CONTROLLERPREFERRED_PATH=THIS_CONTROLLERNO

7–32 CLI Commands READ_CACHE (Default)NOREAD_CACHESets the controller’s cache read policy function. Read caching improves performance in almost a

7–33Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideWRITE_PROTECT NOWRITE_PROTECT (Default)Tells the controller whe

xxiiiCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideRevision HistoryThis is a new document.

7–34 CLI Commands ExamplesThis example shows how to create unit D102 from a single-disk drive named DISK10000 and sets the host’s access to the u

7–35Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCLEAR_ERRORS CLIStops the display of current or previous error

7–36 CLI Commands CLEAR_ERRORS controller INVALID_CACHEClears an invalid cache error and allows the controller and cache to resume operation. If

7–37Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSpecify DESTROY_UNFLUSHED_DATA to retain the controller informa

7–38 CLI Commands See alsoCLEAR_ERRORS CLICLEAR_ERRORS LOST_DATACLEAR_ERRORS UNKNOWNCLEAR_ERRORS UNWRITEABLE_DATA

7–39Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCLEAR_ERRORS device-name UNKNOWNIf a device failure causes the

7–40 CLI Commands CLEAR_ERRORS unit-number LOST_DATAClears lost data errors on a unit; all partitions on the unit’s container are affected.The co

7–41Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSee alsoCLEAR_ERRORS CLICLEAR_ERRORS INVALID_CACHECLEAR_ERRORS

7–42 CLI Commands CLEAR_ERRORS unit-number UNWRITEABLE_DATAClears an unwriteable data error on a unit. It affects all partitions on the same cont

7–43Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSee alsoCLEAR_ERRORS CLICLEAR_ERRORS INVALID_CACHECLEAR_ERRORS

7–44 CLI Commands CONFIGURATION RESETErases the entire configuration on “this controller,” restores the controller’s default configuration, and s

7–45Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCONFIGURATION RESTORECopies a controller’s configuration from t

7–46 CLI Commands SyntaxCONFIGURATION RESTORE See alsoCONFIGURATION RESETCONFIGURATION SAVEINITIALIZE

7–47Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCONFIGURATION SAVEForces a current copy of configuration inform

7–48 CLI Commands CREATE_PARTITIONDivides a non-transportable disk drive storageset into several, separately-addressable storage units. The comma

7–49Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideTo create a partition, specify a percentage of the container’s

7–50 CLI Commands ADD DISK DISK10000 1 0 0ADD DISK DISK20100 2 1 0ADD DISK DISK30200 3 2 0ADD RAIDSET RAID9 DISK10000 DISK20100 DISK30200INITIALI

7–51Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDELETE connectionsDeletes a host connection entry from the tabl

7–52 CLI Commands ExamplesDeletes the host connection Server1 from the table of known connections (unless the access path to Server1 is specifica

7–53Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDELETE container-name Deletes a container belonging to the cont

1–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChapter 1General DescriptionThis chapter illustrates and describ

7–54 CLI Commands ExamplesTo delete a disk drive named DISK10000, type:DELETE DISK10000To delete a stripeset named STRIPE1, enter:DELETE STRIPE1T

7–55Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDELETE FAILEDSETRemoves a disk drive from the failedset. The fa

7–56 CLI Commands DELETE SPARESETRemoves a disk drive from the spareset.SyntaxDELETE SPARESET disk-nameParameterdisk-nameIdentifies the disk driv

7–57Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDELETE unit-number Deletes a logical unit from the controller c

7–58 CLI Commands DESTROY_PARTITIONMarks the area reserved for a partition as available. The freed area is then consolidated with any adjacent fr

7–59Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideExampleThe following example shows how to delete the unit for p

7–60 CLI Commands DIRECTORYLists the diagnostics and utilities available on “this controller.”SyntaxDIRECTORYExampleThe example below shows how t

7–61Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideHELP Displays a brief explanation of how to use the question ma

7–62 CLI Commands INITIALIZEInitializes or destroys metadata on a container. During initialization, a small amount of disk space is reserved for

7–63Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideParameterscontainer-nameSpecifies the container to initialize.

1–2 General Description The HSG80 Array Controller SubsystemTake a few moments to familiarize yourself with the major components of the HSG80 arr

7–64 CLI Commands The default chunk size for storagesets with less than 9 members is 256 blocks, or 128 kilobytes (K). The default chunk size for

7–65Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSpecify SAVE_CONFIGURATION to store a copy of the controller co

7–66 CLI Commands SHOW DEVICES FULLName Type Port Targ Lun Used by-----------------------------------------

7–67Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideLOCATEIndicates the physical location of configured units, stor

7–68 CLI Commands PTL (SCSI-location)Causes the device fault LED on the device at the given SCSI location to flash. See “Mapping the Physical Dev

7–69Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideThis example shows how to cause the device fault LEDs on all of

7–70 CLI Commands MIRRORCreates a one-member mirrorset from a single disk. This command is used only on disks configured as units or members of a

7–71Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSwitchesCOPY=FASTCOPY=NORMAL (Default)Sets the speed at which t

7–72 CLI Commands Specify NOPOLICY to prevent the controller from automatically replacing a failed disk device. This causes the mirrorset to oper

7–73Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSee alsoADD MIRRORSETREDUCESHOW MIRRORSETSUNMIRROR

1–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFigure 1–1. The HSG80 Subsystem12438 7 7 916131415121110CXO6841

7–74 CLI Commands POWEROFFPowers off all disk units in a cabinet and turns off the cabinet power.SyntaxPOWEROFFSwitchesBATTERY _ONBATTERY_OFF (De

7–75Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSECONDS=nnAs soon as the POWEROFF command is entered, all disk

7–76 CLI Commands In dual-redundant mode, if both controllers can’t be shutdown, then both controllers and their batteries’ chargers remain on.Ex

7–77Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideREDUCERemoves member disk drives from mirrorsets and decreases

7–78 CLI Commands For each reduced mirrorset, there must be at least one remaining normal member after the reduction. If this is not true for all

7–79Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideName Storageset Uses U

7–80 CLI Commands RENAMERenames a specified container or a specified host connection.SyntaxRENAME old-name new-nameParametersold-nameSpecifies th

7–81Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideRESTART controllerFlushes all user data from the specified cont

7–82 CLI Commands IMMEDIATE_SHUTDOWNNOIMMEDIATE_SHUTDOWN (Default)Instructs the controller whether to flush the write-back cache or not.CAUTION:

7–83Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideRETRY_ERRORS UNWRITEABLE_DATACauses the controller to attempt t

1–4 General Description Table 1–1. Key to Figure 1–1 The HSG80 SubsystemItem Description1 BA370 rack-mountable enclosure2 Cooling fan3 Power cab

7–84 CLI Commands RUNRuns a diagnostic or utility program on “this controller.” Diagnostic and utility programs only run on “this controller.”Syn

7–85Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCAUTION: Run the DILX utility in the autoconfigure mode only a

7–86 CLI Commands ExampleThis example shows how to start the DILX diagnostic program:RUN DILX...See alsoDIRECTORY

7–87Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSELFTEST controllerFlushes the data from the specified controll

7–88 CLI Commands IMMEDIATE_SHUTDOWNNOIMMEDIATE_SHUTDOWN (Default)Instructs the controller whether to flush the write-back cache or not.CAUTION:

7–89Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSET connection-nameChanges the operating characteristics of a h

7–90 CLI Commands Unit number = the number assigned to the unit in the ADD UNIT command. This is the number by which the unit is known interna

7–91Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSET controller Changes parameters on the specified controller.N

7–92 CLI Commands Table 7–4. SET controller SwitchesSwitch ValuesALLOCATION_CLASS 0-4294967295In DIGITAL Open VMS, do not specify a number over

7–93Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSCSI_VERSION SCSI-2 (default)SCSI-3TERMINAL_PARITYNOTERMINAL_PA

1–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSummary of HSG80 FeaturesTable 1–2 summarizes the features of th

7–94 CLI Commands ALLOCATION_CLASSAllocation class is a unique identification number assigned to the controller pair under certain operating syst

7–95Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCAUTION: Setting CACHE_UPS without having a UPS or similar bac

7–96 CLI Commands MIRRORED_CACHENOMIRRORED_CACHE (Default)Enables the mirrored-write-back-data cache feature on dual-redundant controllers. When

7–97Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideNODE_ID=nnnn-nnnn-nnnn-nnnn checksumSets the subsystem worldwid

7–98 CLI Commands PORT_1_TOPOLOGY=FABRICPORT_2_TOPOLOGY=FABRICUsed only in switch (FC-SW) topology.Specifies switch topology for a host port.PROM

7–99Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideIt also specifies how the command console LUN is handled. The c

7–100 CLI Commands ExamplesThis example shows how to change the other controller’s CLI prompt:SET OTHER_CONTROLLER PROMPT=CONTROLLER “B”This exam

7–101Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSET device-nameChanges the transportable characteristics and t

7–102 CLI Commands Storagesets cannot be made transportable. Specify NOTRANSPORTABLE for all disks used in RAIDsets, stripesets, mirrorsets, and

7–103Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSET EMUSets operating parameters for the environmental monitor

iiiCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideContentsAbout This GuideGetting Help. . . . . . . . . . . . . .

1–6 General Description Host bus interconnect Optical: MultiMode 50 Micron(Do not mix media types) Gigabit Link Module (GLM)Device protocol SCSI

7–104 CLI Commands If any of the setpoints assigned to a slave EMU do not match the corresponding setpoints assigned to the master EMU, the slave

7–105Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSelect FANSPEED=AUTOMATIC to allow the EMU to control the fan

7–106 CLI Commands SET FAILEDSETChanges the automatic replacement policy for the failedset.SyntaxSET FAILEDSET SwitchesAUTOSPARENOAUTOSPARESpecif

7–107Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideThese steps use DISK10000 as an example.1. Delete all containe

7–108 CLI Commands SET FAILOVERConfigures both controllers to operate in a dual-redundant, transparent failover, configuration. This allows both

7–109Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideExampleThis example shows how to set the controllers in a dual

7–110 CLI Commands SET mirrorset-name Changes the characteristics of a mirrorset, including the addition and removal of members.SyntaxSET mirrors

7–111Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideNOTE: No other switches can be set when you specify the MEMBE

7–112 CLI Commands NOTE: Normalizing members exist only when you first create a mirrorset or when you clear lost data on a mirrored unit. The co

7–113Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSpecify POLICY=BEST_PERFORMANCE to choose a replacement disk d

1–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideMaximum number of RAID-5, RAID-1, and RAID-0 storagesets 45Maxim

7–114 CLI Commands This example shows how to remove member DISK30000 from mirrorset MIRR1 created above. If the mirrorset has a replacement polic

7–115Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSET MULTIBUS_FAILOVERPlaces “this controller” and the “other c

7–116 CLI Commands Due to the amount of information being passed from one controller to the other, this command may take up to one minute to comp

7–117Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSET NOFAILOVERReconfigures both controllers to operate in a no

7–118 CLI Commands Specify NODESTROY_UNFLUSHABLE_DATA to leave the unwritten data intact in the failed controller’s write-back cache. When the fa

7–119Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSET NOMULTIBUS_FAILOVERReconfigures both controllers to operat

7–120 CLI Commands Under some circumstances, the data in a failed controller’s write-back cache may not fail over to the operating controller’s w

7–121Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSET RAIDset-name Changes the characteristics of a RAIDset.Synt

7–122 CLI Commands RECONSTRUCT=FASTRECONSTRUCT=NORMAL (Default)Sets the speed at which the controller reconstructs the data on the new RAIDset me

7–123Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideREPLACE=disk-nameInstructs the controller to add a disk member

1–8 General Description Controller ComponentsFigure 1–2 details the HSG80 Array Controller and its Fibre Channel optical components.Figure 1–2.

7–124 CLI Commands SET remote-copy-set-nameIMPORTANT: This command works in a remote copy environment only using HSG80 ACS V8.4P code, where loc

7–125Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSelect NORMAL to unlock the remote copy center and to change t

7–126 CLI Commands SET unit-numberChanges the characteristics of a unit.SyntaxSET unit-numberParameterunit-numberSpecifies the logical unit numbe

7–127Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideNOTE: Regardless of storageset type, the RUN and NORUN switch

7–128 CLI Commands If you enable another host ID, previously enabled hosts are not disabled. The new ID is added. If you wish to enable only cert

7–129Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuidePREFERRED_PATH=OTHER_CONTROLLERPREFERRED_PATH=THIS_CONTROLLERN

7–130 CLI Commands Read caching improves performance in almost all situations, so it is generally recommended to leave it enabled. However, under

7–131Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSpecify WRITE_PROTECT to prevent host write operations to the

7–132 CLI Commands ExampleThis example shows how to enable write protect and turn off the read cache on unit D102:SET D102 WRITE_PROTECT NOREAD_C

7–133Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSHOWDisplays information about controllers, storagesets, devic

1–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideNOTE: To view an optional maintenance port cable and its compon

7–134 CLI Commands THIS_CONTROLLEROTHER_CONTROLLERdevice-nameSpecifies the name of a particular device to be displayed. For example, SHOW DISK201

7–135Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guideunit-numberSpecifies the name of a particular unit to be displ

7–136 CLI Commands ExamplesThis example shows how to display a listing of disks:SHOW DISKSName Type Port Targ Lun Used by --

7–137Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideThis example shows how to display a complete listing of the mi

7–138 CLI Commands This example shows the full information for a controller:SHOW THIS_CONTROLLER FULLController:HSG80 (C) DEC CX00001905 Softw

7–139Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCACHE_FLUSH_TIMER = DEFAULT (10 seconds)Mirrored Cache:Not ena

7–140 CLI Commands SHUTDOWN controllerFlushes all user data from the specified controller’s write-back cache (if present) and shuts down the cont

7–141Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideIMMEDIATE_SHUTDOWNNOIMMEDIATE_SHUTDOWN (Default)Instructs the

7–142 CLI Commands UNMIRRORConverts a one-member mirrorset back to a non-mirrored disk drive and deletes its mirrorset from the list of known mir

A–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideAppendix ASystem ProfilesThis appendix contains device and stora

1–10 General Description Controller ComponentsThe HSG80 Array Controller components that you will use most often, such as the maintenance port an

A–2 System Profiles Device ProfileType of DeviceDevice SwitchesInitialize SwitchesUnit Switches___ Platter disk drive ___ Optical disk drive ___ Tape

A–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideStorageset ProfileType of storagesetPartitionsRAIDset SwitchesMi

A–4 System Profiles Enclosure TemplatePower SupplyPower SupplyPower SupplyPower SupplyPower SupplyPower SupplyPower SupplyPower Supply

B–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideAppendix BController SpecificationsThis chapter contains physica

B–2 Controller Specifications Physical and Electrical Specifications for the ControllerTable B–1 lists the physical and electrical specifications for

B–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideEnvironmental SpecificationsThe HSG80 array controller is intend

B–4 Controller Specifications Table B–3 Maximum Operating Environmental SpecificationsCondition SpecificationTemperature +10° to +40°C (+50° to +104°

GL–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideGlossary This glossary defines terms pertaining to the HSG80 Fi

GL–2 Glossary array controller softwareAbbreviated ACS. Software contained on a removable ROM program card that provides the operating system for the

GL–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guidebuilt-in self-test A diagnostic test performed by the array con

1–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideOperator Control Panel The operator control panel (OCP) co

GL–4 Glossary command line interpreterThe configuration interface to operate the controller software.configuration file A file that contains a repres

GL–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guidedata striping The process of segmenting logically sequential da

GL–6 Glossary dual-simplex A communications protocol that allows simultaneous transmission in both directions in a link, usually with no flow control

GL–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guidefailedset A group of failed mirrorset or RAIDset devices automa

GL–8 Glossary FCC Class B This certification label appears on electronic devices that can be used in either a home or a commercial environment within

GL–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guidefull duplex (adj) Pertaining to a communications method in whic

GL–10 Glossary hot disks A disk containing multiple hot spots. Hot disks occur when the workload is poorly distributed across storage devices which p

GL–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideI/O interfaceSee interface.I/O module A 16-bit SBB shelf devic

GL–12 Glossary local terminal A terminal plugged into the EIA-423 maintenance port located on the front bezel of the controller. See also maintenance

GL–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guidemaintenance terminalAn EIA-423-compatible terminal used with t

1–12 General Description After you configure your controller, you should periodically check its control panel. If an error occurs, one or more of

GL–14 Glossary not permitted to arbitrate or originate frames. An L_Port in non-participating mode may or may not have an AL_PA. See also participati

GL–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guideother controller The controller in a dual-redundant pair that

GL–16 Glossary parity RAIDSee RAIDset.partition A logical division of a container, represented to the host as a logical unit.peripheral device Any un

GL–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guideprotocol The conventions or rules for the format and timing of

GL–18 Glossary RAID level 3/5 A DIGITAL-developed RAID storageset that stripes data and parity across three or more members in a disk array. A RAIDse

GL–19Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guiderequest rate The rate at which requests are arriving at a serv

GL–20 Glossary SCSI device ID numberA bit-significant representation of the SCSI address referring to one of the signal lines, numbered 0 through 7 f

GL–21Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guidestorage array subsystemSee storage subsystem.storageset (1) A

GL–22 Glossary striping The technique used to divide data into segments, also called chunks. The segments are striped, or distributed, across members

GL–23Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideUltra SCSI A Fast-20 SCSI bus. See also Wide Ultra SCSI.unit

1–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideVirtual Terminal DisplayUse the virtual terminal display (VTDPY

GL–24 Glossary write-back caching A cache management method used to decrease the subsystem’s response time to write requests by allowing the controll

I–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideIndexAAC input modulepart number, 1–4Access pathsgeneral descrip

I–2 Index to spareset using CLI, 6–15Addressesproviding with the PVA module, 5–29Addressingcontroller and host, 3–1PTL convention, 3–6ALLOCATION_CLAS

I–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCache policiesfault-tolerance for write-back caching, 2–11Cache,

I–4 Index CLEAR_ERRORS controller INVALID_CACHE, 7–36CLEAR_ERRORS device-name UNKNOWN, 7–39CLEAR_ERRORS unit-number LOST_DATA, 7–40CLEAR_ERRORS un

I–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCONFIG, running, 7–84Configurationmodifying controller configura

I–6 Index controller and cache module location, 1–10displaying information, 7–133dual-redundant controller configuration, 5–14, 5–23dual-redundant co

I–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSECTORS_PER_TRACK, 7–49SIZE, 7–48CREATE_PARTITION container-name

I–8 Index Device profile, A–2Device protocol, 1–6Device statistics utility. See DSTAT utilityDevice switches, 4–36, 4–41changing switches, 4–36device

I–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guidepartitions supported, 5–3removing from a mirrorset, 7–77removing

1–14 General Description microcode updates. Contact the Customer Service Center (CSC) for directions in obtaining the appropriate EMU microcode a

I–10 Index Erasing metadata, 4–49Error messagesclearing from CLI, 7–35clearing unwriteable data errors, 7–42Examplesadding disk drives to a spareset,

I–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guideassigning access paths, 3–14bus dynamics, 3–2connecting to the

I–12 Index INITIALIZE container-name, 7–62Initialize switches, 4–43chunk size, 4–43CHUNKSIZE, 4–43DESTROY, 4–49destroy/nodestroy, 4–49NODESTROY, 4–49

I–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideMembershipRAIDset switches, 4–38Metadataerasing, 6–17retaining,

I–14 Index NODESTROY, 4–49INITIALIZE, 7–64NODESTROY_UNFLUSHABLE_DATASET NOMULTIBUS_FAILOVER, 7–119NODESTROY_UNFLUSHED_DATACLEAR_ERRORS controller INV

I–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guidefor RAIDsets, 4–37for storage units, 6–2initialize, 4–43Other c

I–16 Index PORT_1_TOPOLOGYSET controller, 7–97PORT_2_ALPASET controller, 7–97PORT_2_TOPOLOGYSET controller, 7–97PortsSee also Device ports, Host port

I–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guideadding while missing a member, 7–19changing characteristics, 7–

I–18 Index NOIGNORE_ERRORS, 7–81NOIMMEDIATE_SHUTDOWN, 7–82Restarting subsystem, 5–37Restarting the subsystem, 5–37Restoring configuration, 7–45RETRY_

I–19Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideNOTERMINAL_PARITY, 7–99PORT_1_ALPA, 7–97PORT_1_TOPOLOGY, 7–97PO

1–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCache ModuleEach controller requires a companion cache module a

I–20 Index controller behavior at restart, 7–82controller behavior at shutdown, 7–141controller behavior selftest, 7–88controller cache flush timer,

I–21Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideNOIMMEDIATE_SHUTDOWN, 7–141Shutting down subsystem, 5–36Shuttin

I–22 Index striped mirrorsets, 4–2stripesets, 4–2, 4–9See also Configuration rulesStorageWorks array controller, 7–2Striped mirrorsetunit number in O

I–23Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideTerminology of the controller, 2–2Testing controllers, 7–87This

I–24 Index VTDPY, 1–13See also Config utilitySee also HSUTILTroubleshooting and maintaining the controllerutilities and exercisers, 1–12Typographical

I–25Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideClone utility, 1–14CONFIG utility, 1–13DILX, 1–13DSTAT, 1–14FMU

iv Chapter 2Controller and Host ConceptsTerminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–16 General Description Figure 1–5. Cache ModuleTable 1–6. Key to Figure 1–5 Cache ModuleItem Description➀Cache-memory power LED button➁ECB Y

1–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideExternal Cache BatteryTo preserve the write-back cache data in

1–18 General Description When the batteries are fully charged, an ECB can preserve 512 MB of cache memory for 24 hours. However, the battery capa

1–19Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideBattery HysteresisWhen charging a battery, write-back caching w

2–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChapter 2Controller and Host ConceptsThis chapter provides conce

2–2 Controller and Host Concepts TerminologyWhen configuring the subsystem you will encounter the following terms and concepts that you must unde

2–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide Other controller—the controller that you are not currently con

2–4 Controller and Host Concepts Unresponsive and Surviving ControllersWhen a failover occurs in a dual-redundant pair of controllers, the contro

2–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSelecting a Failover ModeWhen you select a failover mode, your s

vCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideController and Port Worldwide Names (Node IDs). . . . . . . . . .

2–6 Controller and Host Concepts Shared Port IDsFigure 2–3 shows one example of a Fibre Channel Switched Fabric (FC-SW) configuration in transpar

2–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideAs Figure 2–3 shows, only port 1 on controller A normally is act

2–8 Controller and Host Concepts Figure 2–4. Example of Separate Host Port IDs in Multiple-Bus FailoverAs Figure 2–4 shows, all ports on both co

2–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCaching TechniquesThe cache module supports the following cachin

2–10 Controller and Host Concepts During read-ahead caching, the controller anticipates subsequent read requests and begins to prefetch the next

2–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFault-Tolerance for Write-Back CachingThe cache module supports

2–12 Controller and Host Concepts Table 2–2 shows the cache policies resulting from a full or partial failure of cache module A in a dual-redunda

2–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDIMM or cache memory controller chip failureGood Data integrity

2–14 Controller and Host Concepts Table 2–3 shows the cache policies resulting from full or partial failure of cache module A’s ECB in a dual-red

2–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideTable 2–3. Resulting Cache Policies and ECB StatusECB Status C

vi Reconstruction Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–37Membership . . . . . . . . . . .

2–16 Controller and Host Concepts Failed At least 50% chargedData loss: NoCache policy: Controller A supports write-through caching only; control

2–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFailed Less than 50% chargedData loss: NoCache policy: Both con

2–18 Controller and Host Concepts Enabling Mirrored Write-Back CacheBefore configuring dual-redundant controllers and enabling mirroring, ensure

3–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChapter 3Controller and Host AddressingThis chapter provides a b

3–2 Controller and Host Addressing Bus DynamicsYour controller is the intelligent bridge between your host and the devices and the logical units

3–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideHost BusWhen the host communicates to the controller through the

3–4 Controller and Host Addressing Containers and StoragesetsContainers and storagesets are comprised of physical devices. The logical units are

3–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideThe following are the supported storagesets for the HSG80 array

3–6 Controller and Host Addressing Logically Connecting the Storage Array to the HostThe combination of storage devices is called a storage array

3–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuidePlace one space between the port number, target number, and the

viiCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideSetting a Port Offline . . . . . . . . . . . . . . . . . . . . .

3–8 Controller and Host Addressing Figure 3–4 PTL Addressing in a ConfigurationIn Figure 3–4, the controller addresses DISK30800 through device

3–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideWhen your controller receives an I/O request, it identifies the

3–10 Controller and Host Addressing Mapping the Containers and Storagesets to the Host with Logical UnitsIn a subsystem, the host communicates to

3–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFigure 3–6 Controller Port ID and Unit Numbers in Transparent

3–12 Controller and Host Addressing Figure 3–7 Controller Port ID Numbers and Unit Numbers in Multiple-Bus Failover ModeController APort 1 (Acti

3–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideAssigning Unit OffsetsUnit offsets are used to define the first

3–14 Controller and Host Addressing Assigning Access PathsDifferent operating systems may not tolerate other operating systems’ access to their u

3–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideController and Port Worldwide Names (Node IDs)A worldwide name—

3–16 Controller and Host Addressing In a subsystem with two controllers in transparent failover mode, the controller port IDs increment as follow

3–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideRestoring Worldwide Names (Node IDs)CAUTION: Each subsystem ha

viii Moving Storagesets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–25Chapter 7CLI CommandsC

4–1Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideChapter 4Planning StoragesetsThis chapter takes you through the

4–2 Planning Storagesets IntroductionStoragesets are implementations of RAID technology, also known as a “Redundant Array of Independent Disks.”

4–3Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFigure 4–1. Units Created from Storagesets, Partitions, and Dri

4–4 Planning Storagesets Planning and Configuring StoragesetsUse this procedure to plan and configure the storagesets for your subsystem. Use the

4–5Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideCreating a Storageset and Device ProfileCreating a profile for y

4–6 Planning Storagesets TYPE OF STORAGESETPartitionsRAIDset SwitchesMirrorset SwitchesInitialize SwitchesUnit SwitchesFigure 4–2 A Typical Stor

4–7Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDetermining Storage RequirementsStart the planning process by de

4–8 Planning Storagesets Choosing a Storageset TypeDifferent applications may have different storage requirements, so you will probably want to c

4–9Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFor a comprehensive discussion of RAID, refer to The RAIDBOOK—A

ixCompaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideDELETE container-name . . . . . . . . . . . . . . . . . . . . .

4–10 Planning Storagesets The relationship between the chunk size and the average request size determines if striping maximizes the request rate

4–11Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFor example, if the mean time between failures (MTBF) for a sin

4–12 Planning Storagesets Figure 4–4. Distribute Members across Device PortsTable 4–3. Key to Figure 4–4 Distribute Members across Device Ports

4–13Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide Stripesets contain between 2 and 24 members. Stripesets are

4–14 Planning Storagesets Figure 4–5. Mirrorsets Maintain Two Copies of the Same DataConsiderations for Planning a MirrorsetKeep these points in

4–15Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide If you’re using more than one mirrorset in your subsystem, yo

4–16 Planning Storagesets Place mirrorsets and RAIDsets on different ports to minimize risk in the event of a single port bus failure. Mirrors

4–17Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference GuideFigure 4–7. Parity Ensures Availability; Striping Provides Goo

4–18 Planning Storagesets The relationship between the chunk size and the average request size determines if striping maximizes the request rate

4–19Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide RAIDsets are particularly well-suited for the following:❏ Sma