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HP StorageWorksXP24000/XP20000 Cache ResidencyManager User GuideAbstractThis document describes and provides instructions for using the Cache Residenc

3 Preparing for Cache Residency Manager OperationsThis chapter describes the system and installation requirements for Cache Residency Manager. Italso

For instructions on using the storage system Remote Web Console software and enabling theoption, see the HP StorageWorks XP24000/XP20000 Remote Web Co

user data to use Cache Residency. However, RAID-5 or RAID-6 subsystems require three times thecache size.Note: If external volumes are used, twice the

Setting value of starting address (LBA) is the value which is input in the CacheResidency window.• Ending value = (↓Setting value of ending address (L

a. Where the bind mode is set:For RAID-1:• Required cache size = Number of addresses x (512 + 16) x 2 ÷ 1,024The unit is KB.For RAID type other than R

Setting value of ending address (CC) and Setting value of ending address (HH) is thevalue which is input in the Cache Residency window.• Converted val

• The user has the option of pre-staging the data to the resident cache area. If pre-staging isnot used, the data will be loaded into the Cache Reside

• Do not apply or refer to Cache Residency settings to volumes from the host and Remote WebConsole computer at the same time, though you can apply the

To identify the exact number of LBAs in an LDEV, you must first display the Reports Display windowand search for the parity group to which the LDEV be

4 Using the Cache Residency Manager GUIThis chapter describes the various elements of the Cache Residency Manager graphical userinterface.• “Cache Res

© Copyright 2007, 2011 Hewlett-Packard Development Company, L.P.Confidential computer software. Valid license from HP required for possession, use or

Figure 4 Cache Residency Window (Open-systems LDEV selected)Figure 5 Cache Residency Window (Mainframe LDEV selected)20 Using the Cache Residency Mana

CLPR listThe figure below shows the CLPR list, which is located in the upper-right corner of the CacheResidency window. Use the CLPR list to select th

Table 4 Icons in the CU:LDEV treeDescriptionIconIndicates an open/expanded folder. An open LDKC folderdisplays the CUs that belong to that LDKC. An ex

LDEV information table when a mainframe LDEV is selectedLDEV information table showing a requested operationCache Residency Window 23

Table 5 LDEV information table detailsDescriptionItemInformation about the LDEV selected in the CU:LDEV tree:• LDKC:CU:LDEV (“#” after the LDEV number

Figure 6 Cache Information AreaFigure 7 Pre-staging Operation in ProgressFigure 8 Cache Residency Operation in ProgressCache Residency Window 25

The cache information area has the following features:DescriptionItemIf you are logged into Remote Web Console as a storageadministrator, Total Num. o

Figure 9 Operations Box (open-systems LDEV selected)Figure 10 Operations Box (mainframe LDEV selected)Cache Residency Window 27

The Operations box has the following features:DescriptionItemSelect the mode for the data to be added to CacheResidency cache:• Bind sets bind mode.No

DescriptionItemAllows you to request Cache Residency operations for morethan one LDEV. If you check this box and then click Set orRelease, the Multi S

Contents1 Overview of HP StorageWorks XP Cache Residency Manager...52 About Cache Residency Manager Operations...

1. Select the desired options on the Cache Residency window:To specify a range of data to place in Cache Residency cache, enter the starting and endin

Table 6 Multi Set dialog box details (continued)DescriptionItemLDEVs in the selected CU image are available for the MultiSet function. Note that only

Table 7 Multi Release dialog box detailsDescriptionItemSelects the LDKC that contains the desired CU and LDEVs.LDKCSelects the CU image that contains

5 Performing Cache Residency Manager OperationsCache Residency allows you to place data into Cache Residency cache and to release data fromCache Resid

a. Select the desired mode (Bind or Priority) in the Cache Residency Mode box.b. Select the desired Pre-staging Mode setting (Yes or No).Note: To set

Figure 13 Selecting LDEV and Specifying Data Area and OptionsFigure 14 Confirmation Message for Placing Data into CachePlacing Specific Data into Cach

Figure 15 Specifying Same Data Area and Options for Multiple LDEVsFigure 16 Selecting Additional LDEVs on Multi Set Dialog Box (Specific Data Range)36

Figure 17 Verifying Add Data Area OperationPlacing LDEVs into Cache Residency CacheUse this procedure when you want to place ALL data on one or more L

4. If you do not want to apply the same options to any other LDEVs, make sure that the Multi Set/ Release box is not checked, click Set, and then clic

Figure 19 Selecting LDEVs to Place in Cache Residency CacheFigure 20 Selecting Additional LDEVs on Multi Set Dialog Box (All Data)Placing LDEVs into C

Conventions for Storage Capacity Values...47HP Technical Support...

Figure 21 Verifying Add LDEV OperationsReleasing Specific Data from Cache Residency CacheUse this procedure when you want to release specific data are

4. Click Release, and then click OK on the confirmation message.The requested operation is displayed in blue in the LDEV information table.5. Repeat s

Figure 23 Confirmation Message for Deleting DataFigure 24 Verifying Release Data OperationsReleasing LDEVs from Cache Residency CacheUse this procedur

3. If you do not want to release any other LDEVs from Cache Residency cache, make sure thatthe Multi Set / Release box is not checked, click Release,

Figure 26 Selecting Multiple LDEVs on Multi Release Dialog BoxFigure 27 Verifying operations after LDEV Data from CacheChanging Modes after Cache Resi

1. Release the cache extent.2. Restore the data with the new settings.Changing Modes after Cache Residency is Registered in Cache 45

6 TroubleshootingThis chapter explains how to troubleshoot problems that you might experience while using CacheResidency Manager.• “Troubleshooting” (

7 Support and Other ResourcesRelated Documentation• HP StorageWorks XP24000/XP20000 Disk Array Owner Guide• HP StorageWorks XP24000/XP20000 Remote Web

• Operating system type and revision level• Detailed questionsSubscription ServiceHP recommends that you register your product at the Subscriber’s Cho

A Device Types Other Than OPEN-VThis appendix lists Cache Residency information for open system volumes other than OPEN-V:OPEN-3, OPEN-8, OPEN-9, OPEN

1 Overview of HP StorageWorks XP Cache ResidencyManagerThis chapter provides an overview of Cache Residency Manager functions and operations.The Cache

Table 9 Logical Block Addresses for Device Types Other Than OPEN-V(continued)NotesEnding LBAStarting LBAEnding LBAStarting LBA288009528800001055960366

GlossaryCCCHH Cylinder, cylinder, head, head.CLPR Cache logical partition.CRM Cache Residency Manager.CU Control unit.FFD Floppy disk.LLBA Logical blo

IndexBbind mode, 7Ccache extents, 15Cache Residency, 19cache extents, 15enabling and disabling, 10modes, 7overview, 6placing data into cache, 33RAID-5

2 About Cache Residency Manager OperationsThis chapter describes and provides instructions for Cache Residency operations using the licensedstorage sy

on storage systems configured with at least 512 MB of cache. Your HP service representativeconfigures the maximum allowable Cache Residency area when

priority mode, write operations do not have to wait for available cache segments, and there willbe no backend contention caused by destaging data.Tabl

Pre-staging occurs under any of the following circumstances:• When pre-staging is performed from the SVP or from Remote Web Console.• When the power i