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HP XP P9500 User Manual

HP XP P9500 User Manual

Hp p9000 business copy user guide (av400-96393, october 2011)
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HP
P9000 Business Copy User Guide
Abstract
This guide explains how to use HP P9000 Business Copy Software to create nondisruptive, high-speed internal copies of
information stored by open-systems hosts on HP P9000 disk arrays and attached heterogeneous external storage systems.
Topics include how to create, split, suspend, resynchronize, and troubleshoot Business Copy pairs using the Remote Web
Console web client. The intended audience is a storage system administrator or authorized service provider with independent
knowledge of HP P9000 disk arrays and the HP Remote Web Console.
HP Part Number: AV400-96393
Published: September 201 1
Edition: Fifth

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  • Page 1 P9000 Business Copy User Guide Abstract This guide explains how to use HP P9000 Business Copy Software to create nondisruptive, high-speed internal copies of information stored by open-systems hosts on HP P9000 disk arrays and attached heterogeneous external storage systems. Topics include how to create, split, suspend, resynchronize, and troubleshoot Business Copy pairs using the Remote Web Console web client.
  • Page 2 © Copyright 2010, 201 1 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.21 1 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license.

  • Page 3: Table Of Contents

    Contents 1 Business Copy overview................5 Business Copy software......................5 How Business Copy works......................5 Hardware and software components ..................5 Volume pairs (P-VOLs and S-VOLs)..................6 Cascaded pairs ......................6 Remote Web Console GUI....................7 RAID Manager and consistency groups..................7 Initial and update copy operations....................7 Initial copy..........................8 Update copy........................8 2 Requirements and planning...............10 System requirements........................10...
  • Page 4 Delete pairs...........................40 6 Monitoring and maintaining the system............42 Monitoring the system ......................42 Monitoring pair activity, status ....................42 Pair status definitions.....................42 Operations permitted for L1, L2 pairs ................43 Reviewing pair, volume details.....................45 Reviewing S-VOL path information..................46 Reviewing pair, license information ..................47 Reviewing a pair’s operation history..................49 Maintaining the system......................50 Remove reserve attribute from a volume................50...

  • Page 5: Business Copy Overview

    1 Business Copy overview Unless otherwise specified, the term P9000 in this guide refers to the following disk array: P9500 Disk Array The GUI illustrations in this guide were created using a Windows computer with the Internet Explorer browser. Actual windows may differ depending on the operating system and browser used. GUI contents also vary with licensed program products, storage system models, and firmware versions.

  • Page 6: Volume Pairs (P-Vols And S-Vols)

    Figure 1 Business Copy configuration Volume pairs (P-VOLs and S-VOLs) A pair consists of the primary and secondary data volume and the volume. Each primary volume (P-VOL) can be paired with up to three secondary volumes (S-VOLs). Thus, you can create three pairs using one P-VOL.

  • Page 7: Remote Web Console Gui

    Figure 2 Structure of cascaded pairs The P-VOL of the L1 pair is the "root volume." An S-VOL of the L1 pair is a "node volume." A P-VOL of an L2 pair is an L1 S-VOL — a node volume. An S-VOL of an L2 pair is a "leaf volume."...

  • Page 8: Initial Copy

    Initial copy When you create a pair, the initial copy is started by the system, and all the data in the P-VOL is copied to the S-VOL. Before the pair creation the pair’s status is SMPL. While the initial copy is in progress, the status is COPY. The status changes to PAIR when the initial copy is complete.
  • Page 9 Figure 4 Update copy operation Although an initial copy completes and pair status changes to PAIR, the data in the P-VOL and S-VOL may not be the same because the copy of the update data is performed asynchronously. To ensure that P-VOL and S-VOL data are the same at a certain point in time, the pair must be split. CAUTION: If the copy operation is completed without any host I/O, the data in the P-VOL and the data in the S-VOL may not be the same.

  • Page 10: Requirements And Planning

    2 Requirements and planning This chapter describes system requirements and recommendations for planning a Business Copy system. System requirements The following table shows minimum requirements for Business Copy. Table 1 System Requirements Item Requirement Business Copy license Based on purchased capacity. See “License capacity requirements”...

  • Page 11: License Capacity Requirements

    Table 1 System Requirements (continued) Item Requirement Maximum number of pairs decreases if LUSE volumes are used. Consistency groups You can configure up to 128 consistency groups in a storage system, including Business Copy consistency groups and Snapshot consistency groups. Note: Business Copy Z pairs, and Snapshot pairs cannot coexist in the same consistency group.

  • Page 12: Planning Pair Volumes

    Table 2 The volumes and capacities to be counted as the usage capacity of Business Copy (continued) Volume to be counted Capacity to be counted Program product The kind of the volumes Normal-VOL or THP V-VOL THP V-VOL Pool capacity that the volume is using Reserved-VOL Normal VOL...

  • Page 13: Calculating Number Of Differential Tables, Pair Tables

    Table 3 Differential tables, pair tables, and additional shared memory Additional shared memory for Business Number of differential Number of pair tables Number of system Copy tables volumes Base (No additional shared memory) 26,176 8,192 16,384 Extension 1 104,768 16,384 65,536 Extension 2 209,600...

  • Page 14: Calculating Maximum Number Of Pairs

    Round up the total number to the nearest whole number. For example, if the number of the cylinders of the divided volume is 3,019,898,880 KB, the calculation of the total number of the differential tables is as follows. (3,019,898,880 ÷ 256) ÷ 20,448 = 576.9014... When you round up 576.9014 to the nearest whole number, it becomes 577.

  • Page 15: Organizing Volumes Into P-Vols And S-Vols

    To calculate the maximum number of pairs allowed on your system with LUSE volumes Σ[Σ {(α) x (the number of the volumes that forms LUSE volumes)} x (the number of Business Copy pairs)] ≤ (β) and also Σ[Σ {(γ) x (the number of the volumes that forms LUSE volumes)} x (the number of Business Copy pairs)] ≤...

  • Page 16: Planning For Performance

    Table 5 Volume information for Business Copy (continued) Port GID: Pair Volume Associated L1 Associated L1 Associated Associated L2 Type S-VOLs P-VOLs P-VOL L2 S-VOLs 0:00 L1 S-VOL 1A-0:00 4A-0:00, 3B-0:01 L2 P-VOL 0:01 L1 S-VOL 1A-0:00 4B-0:00, 3B-0:01 L2 P-VOL etc...

  • Page 17: System Options

    Residency settings of the two volumes are also exchanged. To avoid performance impact, consider the following: ◦ Both pair volumes should have the same RAID level and HDD type before performing the quick restore operation. You can resume the original RAID levels after the quick restore by again splitting the pair and performing the quick restore.

  • Page 18: Sharing Business Copy Volumes

    3 Sharing Business Copy volumes Business Copy volumes can be shared with other HP program products. This chapter discusses requirements, recommendations, and restrictions for using Business Copy with other products. Open Volume Management Both LUSE and Virtual LUN volumes can be used as Business Copy volumes. With LUSE volumes, the P-VOL and S-VOL must have the same configuration (the same LU capacity and the same number of LUs).

  • Page 19: External Storage

    Migration, destination, and reserved volumes of Auto LUN cannot be used for Business Copy pair operations. To perform Business Copy operations, the Auto LUN volumes must be released first. External Storage If Business Copy is used with External Storage, you can create pairs to use the external volumes. For information about the external volumes, see the HP P9000 External Storage for Open and Mainframe Systems User Guide.

  • Page 20: Continuous Access Synchronous And Continuous Access Journal

    Figure 5 Split processing Continuous Access Synchronous and Continuous Access Journal A Business Copy P-VOL can be shared with shared Continuous Access Synchronous and Continuous Access Journal volumes in certain configurations. Figure 6 Cnt Ac-J, Cnt Ac-S, and BC shared volume configuration 1 Sharing Business Copy volumes...

  • Page 21: Thin Provisioning

    Figure 7 Cnt Ac-J, Cnt Ac-S, and BC shared volume configuration 2 All Business Copy operations, with the following exceptions, can be performed in the Continuous Access Synchronous and Continuous Access Journal secondary sites, irrespective of Continuous Access Synchronous pair status. The Continuous Access Journal delta resync pair’s status must be HOLD or HLDE.
  • Page 22 Table 6 Volume sharing availability of Snapshot and Business Copy Snapshot volume Business Copy volume Can be used as P-VOL? Can be used as S-VOL? Can be used as reserve volume? P-VOL (COPY(RS-R) status P-VOL Status other than (COPY(RS-R) Virtual VOL of Snapshot Pool VOL of Snapshot For details, see Table 7 (page 22)
  • Page 23 Table 7 Operation when Snapshot P-VOL and Business Copy P-VOL are shared (continued) Business Copy The status of Snapshot pair operation COPY PAIR PSUS SMPL COPY COPY PSUE (PD) (RS) (RS-R) (pairsplit -E) Cancelling pair (pairsplit -S) After executing the pairsplit command on a Snapshot pair, you must confirm that pairs in the Snapshot consistency group are all PSUS status before performing restore operations on the Business Copy pair.

  • Page 24: External Storage Access Manager

    Table 8 The operation when Snapshot P-VOL and Business Copy S-VOL are shared (continued) Business Copy The status of Snapshot pair operation COPY PAIR PSUS SMPL COPY COPY PSUE (PD) (RS) (RS-R) received the pairsplit command. For details about Snapshot pair status and operation, see HP P9000 Snapshot User Guide.

  • Page 25: Resource Partition

    Table 10 Relationship between Business Copy operations and External Storage Access Manager pair status (continued) The operation of The status of External Storage Access Manager pair Business Copy COPY PAIR PSUE PSUS SSWS Resynchronizing pair quickly in reverse direction (pairresync -restore) Interrupting copy processing (pairsplit -E)

  • Page 26: Thin Provisioning Z

    Thin Provisioning Z The volumes of Thin Provisioning Z can be used as Business Copy Z P-VOL, S-VOL, and reserved volumes with the following limitations. It is recommended that you use Thin Provisioning volumes for both P-VOL and S-VOL. If you use Business Copy Z P-VOL only as Thin Provisioning Z volumes, you cannot perform Quick Restore.

  • Page 27: Performing Configuration Operations

    4 Performing configuration operations This chapter provides configuration information and instructions. Configuration workflow Setup for Business Copy consists of the following: Ensuring that primary and secondary volumes are set up correctly. Reserving volumes for use as S-VOLs. (Optional.) Setting the Host I/O Performance option, which boosts I/O performance, though copy time slows as a result.

  • Page 28: Set Host I/O Performance Option

    Ensure that the volumes you want to reserve are shown, and then click OK. The selected volumes display in the Preview List. When ready, on the Pair Operations window click Apply. To confirm the settings are applied, use the Display Filter dialog box. NOTE: LDEVs for P-VOLs and S-VOLs listed in Remote Web Console may end in the following special symbols:...
  • Page 29 In the Business Copy Option window, select the Host I/O Performance box. Click Apply. Set Host I/O Performance option...

  • Page 30: Performing Pair Operations

    5 Performing pair operations This chapter provides instructions for performing pair operations using Remote Web Console. Pair operations workflow A typical operations workflow follows: Check pair status. Each operation requires a pair to have a specific status. You also check pair status to insure that an operation completed successfully.
  • Page 31 Because pair creation affects performance on the host, observe the following: Create a pair when I/O load is light. ◦ Limit the number of pairs that you create simultaneously. ◦ When a pair is created, both LDEVs are allocated to the processor blade that the P-VOL is allocated to before the pair was created.

  • Page 32: Split And Create Pairs

    NOTE: When the Preview List already holds some Add Pair operation settings and you specify a different copy pace for new pairs in the Add Pair dialog box, the copy pace for the existing Add Pair settings displayed in the Preview List will be also changed. The latest copy pace specified in the Add Pair dialog box is always reflected to the storage system.
  • Page 33 NOTE: The P-VOL and S-VOL are synchronized only when the pair status changes from COPY(SP) or PSUS(SP) to PSUS. Due to the Business Copy asynchronous update copy operations, this status transition can take several minutes. If you want the S-VOLs you are intending to split to be identical to the P-VOLs, stop all write operations to the P-VOLs before splitting the pairs.
  • Page 34 Change to Modify mode by clicking the icon. In the tree, select the port or host group where the pairs or volumes are located. Related volumes display in the volume list. If a volume is already paired, pair information also displays.

  • Page 35: Splitting Consistency Group Pairs With At-Time Split

    NOTE: The split type is set for all pairs being split. If you change the setting, the latest setting is applied to all pairs. 10. If you are splitting an existing pair or pairs, click OK and go to the last two steps in this procedure.

  • Page 36: Suspend Pair Creation

    Prerequisite Information On registering split time: ◦ When you register the Split time, you can only perform Suspend or Delete pair operations. Split time is rejected if the Paircreate, Split, or Resync operation is performed. If you want to perform one of these operations, reset the registration of the Split time. The specified Split time is reset when power is switched off.

  • Page 37: Resynchronize Pairs

    Select the pair(s) that you want to suspend (or the volume(s) whose pairs you want to suspend), right-click the selected pair(s) to display the menu, and select the Pairsplit-E command to open the Pairsplit-E dialog box. On the Pairsplit-E dialog box, select the pair(s) you want to suspend, and click OK to reflect the settings to the Preview List on the Pair Operation window.
  • Page 38 In a reverse Quick Resync (called Quick Restore), the P-VOL and S-VOL are swapped. No actual data is copied, and the pair is placed in PAIR status. The P-VOL and S-VOL are inaccessible during this operation. As soon as the Reverse ◦...
  • Page 39 You cannot create a Continuous Access Synchronous or Continuous Access Journal pair ◦ with a volume shared by Business Copy during either backward resync operation. When the Reverse Copy or Quick Restore operation is in progress, you cannot create, ◦ split, or resync any pair sharing the same P-VOL.

  • Page 40: Delete Pairs

    NOTE: If you try to perform the quick restore operation to the pair you select from the Pairresync Volume List that is composed of volumes stored in multiple cache logical partitions (CLPRs), a message asking you whether you want to click OK and continue the operation will appear.
  • Page 41 Select the pair(s) you want to delete, right-click, and select Pairsplit-S from the menu. The Pairsplit-S dialog box displays. If you selected a pair that you do not want to delete, select the pair on the Pairsplit-S dialog box, right-click, then click Delete. This removes the pair from the deletion list. Click OK.

  • Page 42: Monitoring And Maintaining The System

    6 Monitoring and maintaining the system This chapter provides information and instructions for monitoring and maintaining the Business Copy system. Monitoring the system Monitoring helps you keep track of pairs and volumes and their current and past conditions. Monitoring should be an ongoing activity. This section provides information for monitoring the following: Pair status.

  • Page 43: Operations Permitted For L1, L2 Pairs

    Table 12 Pair status definitions (continued) Status Description S-VOL Access RAID Manager display COPY(SP) The pairsplit operation in the steady split mode has begun. Any Read only COPY remaining differential data is copied to the S-VOL. When these updates are complete, the pair is split. The split S-VOL is identical to the P-VOL at the time of the split.
  • Page 44 Table 13 Supported L1 pair operations for related L2 status (continued) L2 Pair Status L1 Pair Operations Paircreate Pairsplit Pairresync Pairsplit-E Pairsplit-S COPY(RS) COPY(RS-R) PSUE Not displayed in Remote Web Console. Table 14 Supported L2 pair operations for related L1 status L1 pair status L2 pair operations Paircreate...

  • Page 45: Reviewing Pair, Volume Details

    Reviewing pair, volume details You can review the data related to L1 and L2 pairs and their volumes. This includes volume capacity, pair status, P-VOL and S-VOL identifiers, and several other details. NOTE: LDEVs for P-VOLs and S-VOLs listed in Remote Web Console may end in the following special symbols: A pound or gate symbol (#), which indicates an external volume (for example, 00:00:01#).

  • Page 46: Reviewing S-Vol Path Information

    Table 17 Fields in the Detail dialog box (continued) Field Description Pair Information P-VOL: Displays LUN information using LDKC number:CU number:LDEV number format. S-VOL: Displays LUN information using LDKC number:CU number:LDEV number format. MU: The pair’s MU number (mirror unit number). Status: The status of the pair.

  • Page 47: Reviewing Pair, License Information

    Table 18 Fields in the information dialog box Field Description Pair Information P-VOL and S-VOL columns displays the following path information (examples below from P-VOL column): Port ID (cluster name and channel number. For example: CL3-D) Group number (GID) of the host group. For example: 00 LU number.
  • Page 48 Right-click on the volume list, in any location, then select Information from the menu. The Information dialog box displays. Field descriptions are provided below. Table 19 Fields in the Information dialog box Field Description Business Copy pair(s) Shows the number of Business Copy pairs/and the total number of pair tables for Business Copy and Business Copy Z.

  • Page 49: Reviewing A Pair's Operation History

    Table 19 Fields in the Information dialog box (continued) Field Description Remaining differential table(s) Displays the number of remaining differential tables in the storage system/and the total number of differential tables in the system. For more information, see “Calculating number of differential tables, pair tables” (page 13).

  • Page 50: Maintaining The System

    To change the displaying order, click a column title in the list. The list will be sorted based on the items in the clicked column. If there are more than 16,384 records of operations, the list will be divided into multiple pages and only the list which is currently displayed will be sorted.

  • Page 51: Pair Operations During System, Device Maintenance

    In the volume list, right-click the desired SMPL volumes, then click Change Reserve from the menu. The Reset Reserve Attribute dialog box displays. Select the volume(s) from which you want to remove the attribute, then click OK. The selected volumes display in the Preview List. To change a selection, right-click, select Modify, and make your changes.

  • Page 52: When Switching Power Off

    When switching power off During pair operations, when you switch off the power-supply for the system, ensure the following: Complete processing for an At-Time Split operation before switching off the power supply. If this is not done and the status of some of the pairs in the consistency group is changed but not others, the At-Time Split processing may not resume when you power-on the power supply.

  • Page 53: Troubleshooting

    7 Troubleshooting This chapter provides information and instructions for troubleshooting the Business Copy system. General troubleshooting “General troubleshooting” (page 53) provides general troubleshooting information for Business Copy pairs. Table 20 General troubleshooting Error Corrective action Remote Web Console hangs, or Business Make sure all Business Copy requirements and restrictions are met.
  • Page 54 To find and interpret a RAID Manager error: Do one of the following: If using the RAID Manager-window log, locate the error code you are investigating. An example error code in the RAID Manager-window log is: It was rejected due to SKEY=0x05, ASC=0x20,SSB=0xB9E1,0xB901 on Serial#(64015) If using the operation log file, locate the error code you are investigating.
  • Page 55 Table 21 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description rejected because the status of the Continuous Access Synchronous or Continuous Access Journal pair was not PSUS. 2068 Because the specified P-VOL or S-VOL was being shredded, the pair operation was rejected. 2072 The pair operation was rejected for one of the following reasons: The P-VOL was also a Snapshot pool volume.
  • Page 56 Table 21 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 209e Because the volume specified as the P-VOL was a Mainframe Fibre Data Migration volume, the pair operation was rejected. 20a0 The specified pairs contain the Continuous Access Synchronous asynchronous volumes. Because the CLPRs of the P-VOL and S-VOL of the specified pair were different, the quick restore operation was rejected.
  • Page 57 Table 21 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2310 The pair operation was rejected due to one of the following causes. Because the specified consistency group number had already been used for L1 pair, the pair creation was rejected Because the specified consistency group number had already been used for L2 pair, the pair creation was rejected.
  • Page 58 Table 21 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2332 Because the volume specified as the P-VOL had already had three S-VOLs, the pair creation was rejected. 2333 Because the volume specified as the P-VOL was not the P-VOL of the existing pair, the pair operation was rejected.
  • Page 59 Table 21 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2351 Because the volume specified as the P-VOL and the volume specified as the S-VOL was the same one, the pair operation was rejected. 2352 Because the specified P-VOL and S-VOL was online to the host, the quick restore operation or the reverse copy operation was rejected.

  • Page 60: Troubleshooting The At-Time Split Operation

    Table 21 RAID Manager error codes (SSB1 code: b9a0/b9a1/b9a2/b9a5/b9a6/b9ae/b9af) (continued) SSB2 code Description 2394 Because the number of the pairs in a consistency group exceeded the definable maximum number of pairs, the registering of the pair in the consistency group was rejected. 2395 Because the pair sharing the specified P-VOL as the P-VOL was undergoing the reverse copy operation or the quick restore operation, the pair operation was rejected.
  • Page 61 abnormally with the error code EX_EWSTOT. This error indicates that a timeout has occurred. Probable reasons why the pair status cannot be changed are the following: The Continuous Access Journal pair belongs to a consistency group. The P-VOL and the S-VOL of this pair have the same contents.

  • Page 62: Support And Other Resources

    8 Support and other resources Contacting HP For worldwide technical support information, see the HP support website: http://www.hp.com/support Before contacting HP, collect the following information: Product model names and numbers Technical support registration number (if applicable) Product serial numbers Error messages Operating system type and revision level Detailed questions Subscription service...

  • Page 63: Hp Websites

    HP websites For additional information, see the following HP websites: http://www.hp.com http://www.hp.com/go/storage http://www.hp.com/service_locator http://www.hp.com/support/manuals http://www.hp.com/support/downloads http://www.hp.com/storage/whitepapers Conventions for storage capacity values P9000 disk arrays use the following values to calculate physical storage capacity values (hard disk drives): 1 KB (kilobyte) = 1,000 bytes 1 MB (megabyte) = 1,000 bytes 1 GB (gigabyte) = 1,000...
  • Page 64 Table 22 Document conventions (continued) Convention Element Monospace text File and directory names System output Code Commands, their arguments, and argument values Monospace, italic text Code variables Command variables Monospace, bold text Emphasized monospace text WARNING! Indicates that failure to follow directions could result in bodily harm or death. CAUTION: Indicates that failure to follow directions could result in damage to equipment or data.

  • Page 65: A Business Copy Gui Reference

    A Business Copy GUI reference This appendix describes the Business Copy windows and dialog boxes in Remote Web Console. Pair Operation window The Pair Operation window displays Business Copy volume and pair information for volumes associated with the selected port. From this window you can perform all Business Copy operations. NOTE: The Pair Operation window displays information about both Business Copy and Snapshot pairs.

  • Page 66: Volume List

    Table 23 Menu commands (continued) Field Description S-VOL Reserved volume. In Preview list, this is a preview item. Error. Displays in Preview list. Port. Displays in Tree. Host group. Displays in Tree. SMPL volume. This icon indicates a volume in SMPL status when displayed in the Volume List.

  • Page 67: Preview List

    Table 24 Volume List (continued) Field Description The MU number of the Business Copy pair formed with the P-VOL. MU#s are mirror unit numbers. The storage system assumes the same numbers of P-VOLs as S-VOLs. For example, when a P-VOL is paired with three S-VOLs, though just one P-VOL exists, the system assumes that there are three P-VOLs.

  • Page 68: Pair Operation Command Menu

    To modify an operation or change, right-click the row and select Delete or Modify. To see error messages, click Error. The following table describes the Preview List fields. Table 25 Preview List Field Description P-VOL P-VOL information displays in AAA-BB-CCC(XX:YY:ZZ) format. AAA is the port ID (cluster and channel number) BB is the group number of host group CCC is the LU number...

  • Page 69: Display Filter Dialog Box

    Display Filter dialog box With the Display Filter dialog box, you filter the volumes that display in the Volume List on the Pair Operation window. Click the Display Filter button in the Pair Operation window to see the dialog box. The filter settings you select are effective in the current session only.

  • Page 70: History Window

    History window The History window shows the history of operations performed on Business Copy and Snapshot pairs and data associated with the operations. The upper pane shows Business Copy history. The lower pane shows Snapshot history. NOTE: A P-VOL or S-VOL LDEV number that ends with a pound or gate symbol (#) indicates that the LDEV is an external volume (e.g., 00:00:01 #).

  • Page 71: Option Window

    Table 29 Reference codes (continued) Code Message Description 4740 PSUS END The pair split ended, and the pair status changed to PSUS. 4750 COPY(RS) START Resynchronization of pairs started. COPY(RS-R) START 4760 COPY(RS) END Resynchronization of pairs ended, and the pair status changed to PAIR.

  • Page 72: Glossary

    Glossary allocation The ratio of allocated storage capacity versus total capacity as a percentage. Allocated storage refers to those logical devices (LDEVs) that have paths assigned to them. Allocated storage capacity is the sum of the storage of these LDEVs. Total capacity is the sum of the capacity of all LDEVs on the disk array.
  • Page 73 Mirror unit. OPEN- x A general term describing any of the supported OPEN emulation modes (for example, OPEN-E). There are two types of OPEN-x devices: legacy OPEN-x devices with a fixed size (such as OPEN-3, OPEN-8, OPEN-9, and OPEN-E), and OPEN-V, which has a variable size and is a CVS-based volume.

  • Page 74: Index

    Index At-Time Split operation, Open Volume Management, Option window, Business Copy, pair creation, Pair Operation command menu, Cache Residency, Pair Operation window, calculating maximum number of pairs, pair operations, calculating number of pairs, and system maintenance;system maintenance and pair contacting HP, ops, conventions pair operations workflow,...
  • Page 75 typographic conventions, update copy, volume pairs, volume types, websites HP , HP Subscriber's Choice for Business, product manuals,...

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