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HP StorageWorks XP12000 User Manual

Continuous access xp
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HP StorageWorks
Continuous Access XP user guide
for the XP12000/XP10000/SVS200
Part number: T171 1-96012
Sixth edition: March 2007

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Summary of Contents for HP StorageWorks XP12000

  • Page 1 HP StorageWorks Continuous Access XP user guide for the XP12000/XP10000/SVS200 Part number: T171 1-96012 Sixth edition: March 2007...
  • Page 2 U.S. Government under vendor's standard commercial license. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty.

  • Page 3: Table Of Contents

    ......HP technical support ........
  • Page 4 Host failover software ....... Duplicate volumes ....... . . Host system crash .
  • Page 5 List after command selection ......Modifying parameters and deleting LUs ......Viewing Continuous Access XP pair status for LUs and LDEVs (Pairdisplay) .
  • Page 6 Figures 1 ..Continuous Access XP components for Fibre Channel connections ... 2 ..Remote copy operations ......3 ..Selecting and settling Continuous Access XP Async recordsets at the RCU .
  • Page 7 44 ..Async Option pane ....... 45 ..Asynchronous Option Settings Parameter list ....46 ..Display Item pane .
  • Page 8 Tables 1 ..Document conventions ......2 ..RAID-level configurations for Continuous Access XP .

  • Page 9: About This Guide

    The functions described in this manual may be limited, depending on your assigned level of user access. Some users will have read-only access while others will have limited or full array access. For additional information on users and user groups, please see the HP StorageWorks XP Remote Web Console user guide.

  • Page 10: Document Conventions And Symbols

    Provides clarifying information or specific instructions. NOTE: Provides additional information. TIP: Provides helpful hints and shortcuts. HP technical support 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 •...

  • Page 11: Subscription Service

    Operating system type and revision level • Detailed questions Subscription service HP recommends that you register your product at the Subscriber's Choice for Business website: http://www.hp.com/go/e-updates After registering, you will receive e-mail notification of product enhancements, new driver versions, firmware updates, and other product resources.
  • Page 12 About this guide...

  • Page 13: Continuous Access Xp For The Array

    1 Continuous Access XP for the Array HP StorageWorks Continuous Access XP creates and maintains duplicate copies of user data from a local disk array on a remote disk array. These copies are useful for data duplication, backup, and disaster recovery.

  • Page 14: Components

    Access XP Async) volume groups at the remote site can be recovered with full update sequence consistency, but data currency might be behind the primary site due to the asynchronous remote copy operations. Continuous Access XP Asynchronous provides update sequence consistency for user-defined groups of volumes (such as large databases) and protection for write-dependent applications if a disaster occurs.

  • Page 15: Arrays

    At installation, modes are set to their default values, so discuss these settings with your HP support team. Modes can only be changed by your HP support team representative.

  • Page 16: Volume Pairs (P-Vols And S-Vols)

    XP, the management station must be LAN attached to the MCU of each Continuous Access XP pair. The MCU communicates with the RCU via dedicated Fibre Channel remote copy connections. The MCU controls host I/O operations to the Continuous Access XP P-VOLs and Continuous Access XP initial copy and remote copy operations between the P-VOLs and S-VOLs.

  • Page 17: Continuous Access Xp Asynchronous Consistency Groups

    Only Continuous Access XP Asynchronous pairs belonging to the same CLPR can be allocated to one Continuous Access XP consistency group. For more information about CLPRs, see the HP StorageWorks XP Disk/Cache Partition user guide. Remote copy connections Remote copy connections are physical paths MCUs use to communicate with RCUs.

  • Page 18: Initiator Ports And Rcu Target Ports

    16 MCU ports. However, the number of logical paths that can be specified does not depend on the number of connectable RCU or MCU ports. HP strongly recommends you establish at least two independent remote copy connections (one per cluster) between each MCU and RCU to provide hardware redundancy for this critical communications path.

  • Page 19: Host Failover Software

    Host failover is configured using the host failover software product for the platform (such as Microsoft® Cluster Server or HP Cluster Extension XP), depending on your installation requirements and standards. Command View XP or XP Remote Web Console does not provide host failover functions.

  • Page 20: Update Copy Operations

    Update copy operations Update copy operations occur when the host issues a write I/O operation to the P-VOL of an established Continuous Access XP pair. Update copy operations duplicate P-VOL write I/Os at the S-VOL to keep the volume pair synchronized. Continuous Access XP provides two modes for update copy operations: synchronous and asynchronous.

  • Page 21: Difference Management

    • Asynchronous Mode: The MCU completes P-VOL write operations independently of the associated update copy operations at the S-VOL. The RCU manages the S-VOL updates according to recordset information and maintains sequence ordered data consistency for the S-VOLs. If the P-VOL write operation fails, the MCU reports a unit check and does not create the Continuous Access XP asynchronous recordset for this operation.

  • Page 22: Max. Numb. Of Pairs Accord. To Ea. Emul. Type, When Pairs Are Created Without Cust. Vol

    The ↑…↑ symbols around a value indicate that the value should be rounded up to the next integer. • To calculate the maximum number of pairs that you can create: • Where the added shared memory is one pair: The maximum number of pairs that you can create = ( ↑ (1 1,605 ÷ Number of bitmap areas) ↑ ) The ↑…↑...

  • Page 23: S-Vol Write Option

    CAUTION: You may specify the unit of Difference Management when you create a pair with the Paircreate pane (see Creating Continuous Access XP volume pairs (Paircreate)). If XP12000 is connected with XP1024/XP128, the unit of Difference Management is applied as it is when you specify the unit. If XP12000 is connected with XP1024/XP128, the differential data is stored in units of cylinders.

  • Page 24: Creating And Storing Recordsets At The Mcu

    The parameter length and detailed specification of the Continuous Access XP Asynchronous channel command are different than for Continuous Access XP Synchronous RIOs. You must ensure that your channel extenders support this command. For further details, contact your HP account support representative.

  • Page 25: Types Of Recordsets

    recordset the RCU selects is marked as “host-dirty” and treated as formal data. The RCU settles the updated records in the recordset as follows: • If the corresponding track is in cache (track-hit), updated records in the recordset are copied to the existing cached track, and cache space for the sidefile is released.

  • Page 26: Continuous Access Xp Asynchronous Consistency Group Operations

    HP Cache LUN XP operations might decrease total amount of cache available for Continuous Access XP Asynchronous operations, but they do not directly affect sidefile cache usage. Available cache is the amount of physical cache memory installed on the disk array minus any cache reserved for the HP Cache LUN XP feature.

  • Page 27: Continuous Access Xp Volume Pair Status

    Copy pending timeout This group option specifies maximum delay allowed for Continuous Access XP Async copy operations. The RCU suspends all S-VOLs in the group when: • The RCU has not had any communications from the MCU within the specified time. This situation might indicate a disaster or failure at the primary site.

  • Page 28: Continuous Access Xp Luse Pair Status

    or XP Remote Web Console GUI (Continuous Access XP Pairdisplay pane) or UNIX®/PC server host (RAID Manager Pairdisplay command). A volume not assigned to a Continuous Access XP pair has status SMPL. When a Continuous Access XP pair is started, the MCU changes the status of the P-VOL and S-VOL to COPY. When the initial copy operation is complete, the MCU changes the status of both volumes to PAIR.
  • Page 29 Pair status Description P-VOL access S-VOL access PSUS (pair suspended- Pair is not synchronized because you split Read/write Read only; split) this pair (pairsplit-r) or deleted this pair Read and from the RCU (pairsplit-S). For Continuous write, if write (see Table 8 for split Access XP Async pairs, the MCU and...

  • Page 30: Continuous Access Xp Split Types (Psus)

    Pair status Description P-VOL access S-VOL access Pair Status for Continuous Access XP Asynchronous only: Suspending Pair is not synchronized. This pair is Read/write Read only transitioning from PAIR or COPY to PSUS/PSUE. When the split/suspend pair operation is requested, the status of all affected pairs changes to Suspending.

  • Page 31: Continuous Access Xp Suspend Types

    Table 8 Continuous Access XP split types (PSUS) Type Description Applies to P-VOL (Continuous PSUS, P-VOL by You split the pair from the MCU using the P-VOL Failure option. Access XP Sync Operator S-VOL split type is PSUS-by MCU. only) P-VOL, S-VOL PSUS, S-VOL by You split the pair from the MCU or RCU using the S-VOL option.

  • Page 32: Continuous Access Xp Suspend Types

    When a Continuous Access XP Sync pair is suspended, the MCU stops performing update copy operations to the S-VOL and may or may not continue accepting write I/Os for the P-VOL, depending on the P-VOL fence level pair option. If a synchronous update copy operation fails, the MCU maintains exact synchronization by reporting a unit check and decommitting the P-VOL update.

  • Page 33: Continuous Access Xp Asynchronous Suspension Conditions

    Option)) control Continuous Access XP Asynchronous suspension conditions. For more information about Continuous Access XP Asynchronous suspension conditions, see the Troubleshooting chapter of the HP StorageWorks Command View XP user guide for XP Disk Arrays or the HP StorageWorks XP Remote Web Console user guide for the array.

  • Page 34: Preparing For Continuous Access Xp Operations

    Command View XP. • About the license of HP StorageWorks Continuous Access XP Asynchronous: If you want to use HP StorageWorks Continuous Access XP Asynchronous, you must install not only a license for HP StorageWorks Continuous Access XP Asynchronous but also a license for HP StorageWorks Continuous Access XP .

  • Page 35: One-To-One Volume Copy Operations

    3390-3A/B/C, 3380-KA/B/C) cannot be assigned to Continuous Access XP pairs. NOTE: Contact your HP account support representative for the latest information on supported devices for your platform. Continuous Access XP supports the LU Size Expansion (LUSE) feature of the disk array, which configures expanded LUs using two or more contiguous LDEVs (up to 36).

  • Page 36: Accessing Continuous Access Xp P-Vols And S-Vols

    This can be confusing and is prone to error. If Continuous Access XP S-VOLs and P-VOLs are connected to the same hosts, HP strongly recommends that you define S-VOLs to remain offline (or create them with the RAID Manager ‘no read' option) to avoid this problem.

  • Page 37: Installing Hardware

    (NVS)). Ensure that adequate cache is installed and available for all open systems and mainframe asynchronous mirroring operations. Also consider the amount of HP Cache LUN XP data to be stored in cache when determining the required amount of cache.

  • Page 38: Fibre Channel Remote Copy Connections

    Figure 4 Fibre Channel remote copy connections NOTE: For Fibre Channel interface connections, use the switches as ordinary switch connections. No special settings are required for the array. Fibre Channel interface connection provides the following configurations: • Direct connection: Two devices are connected directly. Figure 5 Direct connection •...

  • Page 39: Configuring Mcus And Rcus For Continuous Access Xp Operations

    Figure 6 Switch connection • Extender connection: Protocol converters and switches are used to connect devices across large distances. Figure 7 Extender connection Configuring MCUs and RCUs for Continuous Access XP operations After preparing the hardware and software, configure MCUs and RCUs for Continuous Access XP operations.

  • Page 40: Add Rcu Pane

    Configure Fibre Channel ports connected to RCUs as initiator ports. For serial interface configurations, configure serial channel ports connected to RCUs as RCPs. For instructions, see Port change operation. Register the RCUs to the current MCU CU image by using the Add RCU pane. Set the options for the registering RCU by using the RCU Option pane (see Registering RCUs (Add RCU) for instructions).

  • Page 41: Combining Continuous Access Xp With Other Data Management Operations

    Figure 10 Async Option pane Figure 1 1 Add CT Group pane NOTE: If you are using Command View XP, proceed with step 9. If you are using XP Remote Web Console, no other actions are required. When you are finished configuring this MCU, exit the Continuous Access XP main pane, and disconnect the Command View XP management station from the disk array.

  • Page 42: Combining Ca Xp Sync And Ca Xp Async Functions With Other Products In Arrays

    Table 12 Combining CA XP Sync and CA XP Async functions with other products in arrays Functions and Can volumes Can volumes Can volumes Can volumes volumes be used as be used as be used as be used as Continuous Continuous Continuous Continuous...
  • Page 43 Functions and Can volumes Can volumes Can volumes Can volumes volumes be used as be used as be used as be used as Continuous Continuous Continuous Continuous Access XP Access XP Access XP Access XP P-VOL? S-VOL? Asynchronous Asynchronous P-VOL? S-VOL? External open- system volume that...
  • Page 44 Functions and Can volumes Can volumes Can volumes Can volumes volumes be used as be used as be used as be used as Continuous Continuous Continuous Continuous Access XP Access XP Access XP Access XP P-VOL? S-VOL? Asynchronous Asynchronous P-VOL? S-VOL? Primary data volume in PSUE...

  • Page 45: Combining Continuous Access Xp And Bc

    Continuous Access XP/BC volume based on Continuous Access XP and BC pair status. For more information abut Business Copy XP, see the HP StorageWorks Business Copy XP user guide for the array. Continuous Access XP user guide...

  • Page 46: Host Pair Status Reporting For Ca Xp, Bc, And Ca Xp/Bc Shared Vols

    NOTE: HP recommends Business Copy (BC) intra-disk array copy operations. If BC is not installed, you can use Continuous Access XP to copy within the same local disk array. This configuration requires at least one fibre cable loop. • For shared Continuous Access XP/BC volumes, the Continuous Access XP pair status is reported to the host if you query the Continuous Access XP P-VOL or S-VOL.

  • Page 47: Shared Continuous Access Xp P-Vol/Business Copy Xp P-Vol

    Figure 12 Shared Continuous Access XP P-VOL/Business Copy XP P-VOL • Figure 13 shows an example of a Continuous Access XP S-VOL that also functions as a BC P-VOL. With this configuration, use BC to provide multiple backup copies of a single Continuous Access XP P-VOL.

  • Page 48: Combining Continuous Access Xp And Lun Security Xp Extension

    VMA is set, you can copy the P-VOL's access attribute recorded in the VMA to the S-VOL. You can set the VMA required to copy the access attribute only to OPEN-V volumes. For more information about LUN Security XP Extension, see the HP StorageWorks LUN Security XP Extension user guide.

  • Page 49: Vma Setting And Availability Of Paircreate Operation

    Table 16 VMA setting and availability of Paircreate operation P-VOL S-VOL Volume with VMA Volume without VMA Volume with VMA Volume without VMA Figure 16 shows the process of the copying of access attribute when you create a pair using the volumes with VMA.

  • Page 50: Copying Access Attributes

    Figure 16 Copying access attributes As you can see in Figure 16, if both the P-VOL and S-VOL have VMA, the P-VOL's VMA is copied to the S-VOL. In Figure 16, the S-VOL's access attribute is Read/Write when the pair status is SMPL. After the P-VOL's VMA is copied to the S-VOL, the S-VOL's access attribute becomes Read Only, which is the same as the P-VOL's access attribute of the P-VOL.

  • Page 51: License Capacity For Lun Security Xp Extension

    NOTE: If the pair is suspended or deleted during the COPY status, the P-VOL's access attribute is not copied to the S-VOL. To copy the P-VOL's access attribute to the S-VOL, ensure that the pair status is PAIR, and suspend or delete the pair. NOTE: When the P-VOL is in the COPY or PAIR status, there are two access attributes that can and cannot be changed according to the existing access attribute.

  • Page 52: Combining Continuous Access Xp And Volume Manager

    Manager XP user guide for the XP12000/XP10000 Combining Continuous Access XP and Cache LUN XP HP Cache LUN XP volumes can be assigned to Continuous Access XP pairs, and Cache LUN XP operations can be performed on Continuous Access XP P-VOLs and S-VOLs.

  • Page 53: Combining Continuous Access Xp And Auto Lun Xp

    This reduces traffic on the local disk array's internal LAN, so inquiries and commands that the Command View XP management station or XP Remote Web Console issues are processed more quickly. For more information about Auto LUN XP, see the HP StorageWorks Auto LUN XP user guide for the XP12000/XP10000.

  • Page 54: Combining Continuous Access Xp And Performance Control Xp

    Access XP operations. In View mode, you can only view Continuous Access XP information. For additional information about Modify and View modes, see the HP StorageWorks Command View XP user guide for XP Disk Arrays or the HP StorageWorks XP Remote Web Console user guide for XP12000/XP10000.
  • Page 55 The Continuous Access XP main pane (also known as the Pair Operation pane) is displayed by clicking the Pair Operation tab. This pane shows information for the selected CU image of the connected disk array and provides access to all Continuous Access XP functions. Table 19 shows the Continuous Access XP functions of each tab.

  • Page 56: Continuous Access Xp Functions

    Table 19 Continuous Access XP functions Description Menu Command Pair Operation Pairdisplay Displays CU information, path information, pair status, and settings information about Continuous Access XP pairs. Monitoring LDEV status is not supported. Paircreate > Synchronous Sets new Continuous Access XP Synchronous pairs. Paircreate >...

  • Page 57: Continuous Access Xp Main Pane (Pair Operation Pane)

    NOTE: The scripting function is not supported for this version. Continuous Access XP main pane (Pair Operation pane) The first pane that appears after clicking the CA tab is the Continuous Access XP main pane, also known as the Pair Operation pane. To display this pane, click Pair Operation on other Continuous Access XP panes.

  • Page 58: Volume List (Partial View)

    LU number (LUN). NOTE: If # is added to the end of an LDEV number, such as 00:3C#, the LDEV is an external volume. For HP StorageWorks External Storage XP user guide details about external volumes, see the •...

  • Page 59: Display Filter Pane

    • CLPR: Number and name of the CLPR to which the volumes forming the pairs belong. For more information about CLPRs, see the HP StorageWorks XP Disk/Cache Partition user guide. NOTE: The S/N, SSID, and Fence columns might be blank while the pair is in transition from a pair status to SMPL.

  • Page 60: Continuous Access Xp Snapshot Function

    Figure 19 Display Filter pane The Display Filter pane contains the following drop-down lists: • G-ID, Port, and CU: Number of G-ID (or all G-IDs), port (or all ports), and CU image (or all CU images) to be displayed. • Type: Pair type: Synchronous or Asynchronous.

  • Page 61: Creating And Exporting (Downloading) Continuous Access Xp Snapshot Files

    NOTE: If # is added to the end of an LDEV number, such as 00:3C#, the LDEV is an external volume. For more HP StorageWorks External Storage XP user guide information about external volumes, see the NOTE: The host group name or iSCSI target name of the LU on the primary site is indicated by up to 8 characters.

  • Page 62: Cu Number Tree And Mcu/Rcu List

    Figure 20 RCU Operation pane The RCU Operation pane contains the following items: • Switch Display options: • MCU&RCU: Displays the CU Number tree and MCU/RCU list (see CU Number tree and MCU/RCU list). The MCU/RCU list is displayed by default. •...

  • Page 63: Rcu Operation Pane With The Mcu&Rcu Option Button Selected

    Figure 21 RCU Operation pane with the MCU&RCU option button selected Select a CU image to display MCU/RCU information for that CU image. You can select only one CU image at a time. The MCU/RCU information includes: • CU: CU number selected on the tree. If you select CU Free, Any appears. •...

  • Page 64: Port Tree And Port List

    Port tree and Port list Click Port in the Switch Display box to display the Port tree and Port list. The Port tree displays channel adapters (fibre: ) and port types (Target: , RCU Target: , Initiator: , External: ), Initiator/External . Only ports that can be selected for remote copy operations are displayed.

  • Page 65: Usage Monitor Pane

    • CLPR: Number and name of the CLPR to which the volumes forming the pair belong. If the consistency group is not in use, this column is blank. For more information about CLPRs, see the HP StorageWorks XP Disk/Cache Partition user guide. •...

  • Page 66: History Operations Pane

    Figure 24 Usage Monitor pane The Usage Monitor pane contains the following items: • Status: Displays Running when monitoring is on. Displays Stop when monitoring is off. When monitoring is stopped, the usage monitor graph is closed. The usage monitor graph can be displayed only when monitoring is running.

  • Page 67: History Operations Pane

    Figure 25 History Operations pane The History Operations pane contains the following items: • Status: Current status of history file. Possible values: • No history file exist: History file does not exist. • Reading a history failed: Failure occurred when referring to history file. •...

  • Page 68: Other Operation Pane

    • VOL: CU number and LDEV number of operated volume. • Paired VOL: CU number and LDEV number of paired volume. • Copy Time: Time taken for operation (from start of operation to end). Displayed only for Pairing Complete and Pair Resync. Complete operations. NOTE: For Continuous Access XP pairs consisting of LUN Expansion (LUSE) volumes, number of Pair Suspend (Failure) rows in the history list does not correspond to number of LDEVs in the LUSE volume.

  • Page 69: Changing Subsystem Settings

    • Reset button: Clears specified settings. Changing subsystem settings Use the Other Operation tab to change subsystem settings. Viewing subsystem settings In the Continuous Access XP main pane, click Other Operation. The Other Operation pane displays the Tree. Click a subsystem from the Tree. The Preset List displays subsystem settings. •...

  • Page 70: Performing Continuous Access Xp Configuration Operations

    100 seconds. The default setting is 70 seconds. The value of the Path Blockade SIM Watch cannot be smaller than the value of the Path Blockade Watch. Figure 28 System Option pane Changing subsystem settings In the Continuous Access XP main pane, click Other Operation. The Other Operation pane displays the Tree.

  • Page 71: Mcu Operations

    • Continuous Access XP Asynchronous operations configure Continuous Access XP Asynchronous groups and options • Modifying parameters and deleting settings • Adding consistency groups (Add CT Group) • Modifying consistency group options (CT Group Option) • Viewing consistency group status (CT Group Status) •...

  • Page 72: Viewing Rcu Status (Rcu Status)

    • Viewing RCU Status (RCU Status) • Registering RCUs (Add RCU) • Registering RCUs (Add RCU) RCU options apply to all CU images of the MCU. • Modifying RCU options (Change RCU Option) • Deleting RCUs (Delete RCU) • RCU path parameters •...

  • Page 73: Rcu Status Pane

    For troubleshooting information about MCU-RCU paths, see the Troubleshooting chapter of the HP StorageWorks Command View XP user guide for XP Disk Arrays or the HP StorageWorks XP Remote Web Console user guide for XP12000/XP10000. Continuous Access XP user guide...

  • Page 74: Registering Rcus (Add Rcu)

    Table 23 Logical path status Status description Condition Normal Logical path was successfully established and can be used for Continuous Access XP copy activities. Initialization Failed Link initialization procedure with the RCU failed because the physical path connection between the MCU and the RCU or the connection between the MCU and the host was missing.

  • Page 75: Add Rcu Pane

    Figure 30 Add RCU pane • RCU S/N: Serial number of RCU being registered. S/N is five digits. • Controller ID: Controller ID of RCU being registered. • Logical Adr. (RCU CU#): CU number of RCU being registered. CU number is 0-1F. •...

  • Page 76: Rcu Option Pane

    Figure 31 RCU Option pane Use the RCU Option pane to set the options for the RCU. • Minimum Paths: Minimum number of paths required for each RCU connected to the current MCU. The default is one. If you specify a number that is larger than the number of paths set on the Register RCU pane or the number of paths falls below this number (for example, failed path), an error occurs.

  • Page 77: Initial Copy Pace For Calculating Initial Copy Response Time

    Round Trip Time = Round Trip Time between MCU-RCU x 2 + Initial Copy response time (ms) For the Round Trip Time between the MCU and RCU, contact your carrier or use the ping command and so on to measure the time. If you do not use lines and so on between the MCU and RCU, specify 1. Initial copy response time is the response time required for multiple initial copy operations.

  • Page 78: Rcu Settings Parameter List

    HP representative can also get the RCU S/N and SSIDs using the RCU's service processor (at the remote site). In the RCU Operation pane, click MCU&RCU in the Switch Display box. In the CU number/Port tree, click the correct CU image. For this step, the list can be blank. You must register and add RCUs to each CU image separately.

  • Page 79: Modifying Rcu Options (Change Rcu Option)

    • Path Watch: Time for monitoring blockade in the Fibre Channel paths on the MCU side Modifying RCU options (Change RCU Option) Use the RCU Options pane to modify RCU options set when you registered the RCU. When the RCU Option pane is opened with the Change RCU Option command, all fields are blank.

  • Page 80: Deleting Rcus (Delete Rcu)

    Deleting RCUs (Delete RCU) You can delete an RCU from an MCU only after all Continuous Access XP volume pairs between the MCU CU image and RCU CU image are deleted. When you delete an RCU from an MCU, the MCU deletes all logical paths from the current MCU CU image to the selected RCU CU image.

  • Page 81: Adding And Deleting Logical Paths For Rcus (Add Path/Delete Path)

    Figure 36 Add RCU pane used for configuration in the previous figure Adding and deleting logical paths for RCUs (Add Path/Delete Path) Use the Add Path and Delete Path commands to add and delete paths for an RCU. When the Add Path command is selected, the Add Path pane appears.
  • Page 82 • Link Address: Link address (serial only). Destination port address on the ESCD (00-FD, 00 for static link to RCU). The Cancel button cancels settings made. The Set button applies settings made and changes the list. NOTE: Maximum number of paths is eight. Each item has seven fields to enter paths, but you cannot enter more than eight paths.

  • Page 83: Adding And Deleting Ssids For Rcus (Add Ssid/Delete Ssid)

    NOTE: After being set, options can be modified and canceled (see Modifying parameters and deleting settings). Click Apply on the Continuous Access XP main pane to apply the deletion to the disk array. Adding and deleting SSIDs for RCUs (Add SSID/Delete SSID) Before adding an SSID, ensure that the remote copy connection is properly installed.

  • Page 84: Port Change Operation

    NOTE: After being set, options can be modified and canceled (see Modifying parameters and deleting settings). Click Apply on the Continuous Access XP main pane to apply settings to the disk array. Port change operation Use the RCU Operation tab to change the port mode. Clicking Port in the Switch Display box changes the tree to the Port tree and changes the list to the Port list.

  • Page 85: Modifying Parameters And Deleting Settings

    NOTE: • Before changing the operation type of a Fibre Channel port from Target or RCU Target to Initiator, disconnect the port from the host, delete all affected Continuous Access XP pairs, delete all paths from the port (if RCU target) to the MCU, and remove all channel paths to the port. •...

  • Page 86: Viewing Consistency Group Status (Ct Group Status)

    • Asynchronous copy option Use the Asynchronous Operation pane to perform asynchronous operations. For more information, see Asynchronous Operation pane. All operations that can be performed from the Asynchronous Operation pane have the following common procedure: Click a consistency group mode (Show ALL, Used, or Not Used) to be operated in the Consistency Group tree.

  • Page 87: Ct Group Status Pane

    first path is listed. NOTE: If # is added to the end of the LDEV number, such as 00:3C#, the LDEV is an external volume. For HP StorageWorks External Storage XP user guide details about external volumes, see the •...

  • Page 88: Adding Consistency Groups (Add Ct Group)

    Adding consistency groups (Add CT Group) Use the Add CT Group command to add a consistency group to the connected MCU. When the Add CT Group command is selected, the Add CT Group pane appears. Use the Add CT Group pane to select group options for the group.

  • Page 89: Modifying Consistency Group Options (Ct Group Option)

    NOTE: After being set, options can be modified and canceled (see Modifying parameters and deleting consistency groups). Click Apply on the Continuous Access XP main pane to apply settings to the disk array. When the Add CT Group pane closes, the list changes to the Consistency Group Settings Parameter list.

  • Page 90: Deleting Consistency Groups (Delete Ct Group)

    • Set button: Sets consistency group options. Connect to the MCU. Split all pairs in the group (Pairsplit-r). From the Consistency Group tree, click a consistency group mode that includes the consistency group to be modified. From the Consistency Group list, click the consistency groups to be modified. Select more than one consistency group with MCU in the This CU column.

  • Page 91: Asynchronous Copy Option

    NOTE: After being set, options can be modified and canceled (see Modifying parameters and deleting consistency groups). Click Apply on the Continuous Access XP main pane to apply the deletion to the disk array. Asynchronous copy option When the Async Option command is selected, the Async Option pane appears. Use the Async Option pane to specify Continuous Access XP asynchronous copy option parameters for the connected disk array.

  • Page 92: Modifying Parameters And Deleting Consistency Groups

    0 to 30%, influence to the I/O delay is kept low. HP recommends that you change the I/O Delay Start and I/O Delay Increase when all Continuous Access XP asynchronous pairs are suspended, or host I/O and sidefiles do not exist. If you do not want to control inflow into a sidefile, specify the value same as the Pending Update Data Rate for the I/O Delay...

  • Page 93: Usage Monitor Operations

    Modifying parameters After performing the CT Group operation, click a consistency group on the list. To modify parameters for Async Option operation, you do not have to select the row on the list. Right-click, and click Modify. A pane for each operation appears. Modify parameters, and click Set.

  • Page 94: Displaying Usage Monitor Graph

    Stopping remote copy usage monitoring Click the Usage Monitor tab. Click Stop in the Operation drop-down list. Click Apply. A confirmation dialog box appears. Click OK to confirm. The Status field changes from Running to Stop. Click Cancel to cancel settings. Displaying usage monitor graph When usage monitoring is running, use the Usage Monitor tab to display user-selected remote copy I/O statistics in real time.

  • Page 95: Display Item Pane

    00:3C#, the LDEV is an external volume. For details about external volumes, see HP StorageWorks External Storage XP user guide To display I/O statistics for the sidefile data, select CLPR, and select the CLPR from the drop-down list.

  • Page 96: Remote Copy I/O Statistics

    NOTE: When you click Normal Size, the host group name or iSCSI target name (up to 8 characters) appears at the top of the graph. To check the host group name or iSCSI target name, enlarge the graph. If the port is connected to an iSCSI target, the iSCSI target name appears, up to 32 characters, even if you magnify the graph.

  • Page 97: Optimizing Continuous Access Xp Operations And Disk Array Performance

    Statistic Description Number of Remained Number of remaining recordsets when the schedule is completed Recordset Scheduling Attempt Count Number of job activations of consistency manager Synchronization Pair Synchronized (%) Percent completion of initial copy operations. For example, number of synchronized pairs/total number of pairs. Out of Synchronous Tracks Number of tracks that have not yet been copied by initial copy or resync copy operations.

  • Page 98: Discontinuing Continuous Access Xp Operations

    Table 27 lists conditions affecting disk array performance and provides recommendations for addressing these conditions. Table 27 Disk array performance conditions and recommendations Description Condition Recommendations Write-intensive Write-intensive workloads, such as Spread write-intensive data across workloads database logging volumes, can have several volumes to minimize queuing.

  • Page 99: Performing Continuous Access Xp Pair Operations

    Command View XP management station to RCUs at your remote site. If you will use RAID Manager commands instead of Continuous Access XP, contact your HP account support representative for information about Continuous Access XP configuration services.

  • Page 100: Common Procedure For Continuous Access Xp Pair Operations

    Common procedure for Continuous Access XP pair operations Use the Continuous Access XP main pane to perform pair setting operations. All operations performed from the Continuous Access XP main pane have the following common procedure: Click a CU number in the CU Number/Port Number tree. NOTE: You must select a CU number in the tree.

  • Page 101: Viewing Continuous Access Xp Pair Status For Lus And Ldevs (Pairdisplay)

    Modifying LU parameters Click the LU on the Pair Settings Parameter list. Right-click, and click Modify. A pane appears. Modify parameters, and click Set. Click Apply on the Continuous Access XP main pane to apply modifications. Deleting LUs Click the LUs on the Pair Settings Parameter list. Right-click, and click Omit.
  • Page 102 NOTE: If an LDEV number contains # at the end (such as 00:3C#), the LDEV is an external volume. For more HP StorageWorks External Storage XP user guide information about external volumes, see the • CLPR: CLPR number and name of the volume on the primary site.

  • Page 103: Creating Continuous Access Xp Volume Pairs (Paircreate)

    NOTE: If # is added to the end of the LDEV number, such as 00:3C#, the LDEV is an external volume. HP StorageWorks External Storage XP user guide For details about external volumes, see the • S-VOL: Secondary volume (S-VOL). Specify each item as follows: Port: 1A-2R, Group: 00-7F, LUN: 00-FF.
  • Page 104 • CT Group: Consistency group already registered. NOTE: Only Continuous Access XP Asynchronous pairs belonging to the same CLPR can be allocated HP StorageWorks XP to one consistency group. For more information about CLPRs, see the Disk/Cache Partition user guide •...

  • Page 105: Pair Settings Parameter List (Paircreate)

    Right-click, click Paircreate, and click the pair mode (Synchronous or Asynchronous). The Paircreate pane appears. Pair mode specifies the update copy mode (see Update copy operations) for new pairs: Synchronous or Asynchronous. The mode selected has the greatest impact on performance and must be considered carefully.

  • Page 106: Continuous Access Xp Initial Copy And Pair Options Of The Paircreate Pane

    • Priority: Priority (scheduling order) of initial copy operations. • Diff: In the measurement of the Cylinder or the Track, Continuous Access XP manages differentials among data. • CTG: Consistency group used for pair created (Asynchronous pairs only). • ErrLvl: Error level, Group or LU. When a failure occurs, pairs in the same group or in an LU are suspended (Asynchronous pairs only).

  • Page 107: Splitting Continuous Access Xp Pairs (Pairsplit-R)

    Priority P-VOL of pair The MCU starts initial copy operations for LUNs 03, 05, 00, and 04 immediately, starts LUN 01 when one of the first four initial copy operations LUN 03 is complete, and starts LUN 02 when the next initial copy operation is complete.

  • Page 108: Pairsplit-R Pane

    Volume: Port - G-ID - LUN of the selected volume. NOTE: If # is added to the end of the LDEV number, such as 00:3C#, the LDEV is an external volume. For HP StorageWorks External Storage XP user guide details about external volumes, see the •...
  • Page 109 • Pending Update: Drain: The MCU changes the Continuous Access XP Async pair status from Suspending to PSUS only after the RCU accepts the pairsplit operation and completes the following steps: Finishes settling all pending recordsets for the pair. Completes negotiation with all MCUs (report ready-for-suspension to all MCUs and receive acknowledgements) without further recordsets generated.

  • Page 110: Resuming Continuous Access Xp Volume Pairs (Pairresync)

    From the Continuous Access XP main pane, verify that Continuous Access XP pairs are displayed correctly (PSUS status) in the Volume list. Use the Pairresync command (see Resuming Continuous Access XP volume pairs (Pairresync)) to resync split Continuous Access XP volume pairs. CAUTION: If a timeout error occurs when the Use Time-Saving Mode option is selected, access the Continuous Access XP main pane, and confirm the volumes on which the pairsplit-r operation could not be performed.
  • Page 111 P-VOL: Port - G-ID - LUN of the selected volume. NOTE: If # is added to the end of the LDEV number, such as 00:3C#, the LDEV is an external volume. For HP StorageWorks External Storage XP user guide details about external volumes, see the •...
  • Page 112 NOTE: If you select a pair from the volume list and change the settings, and then use a drop-down list to set a parameter to blanks, the parameter takes the default value for each pair. If you select settings from the Preset list before applying the changed settings, and then use a drop-down list to set a parameter to blanks in the Pairresync pane, the parameter value in the Preset list does not change.

  • Page 113: Index

    Index Continuous Access XP Asynchronous Add CT Group pane, 88 about, 13 Async Option, 91 adding consistency groups, 88 Asynchronous Operation pane, 64 Async Option pane, 91 audience, 9 consistency groups, 17, 26 consistency status, 31 deleting consistency groups, 90, 93 operation pane, 64 operations, 56, 85...
  • Page 114 document conventions, 10 main pane, 55, 57 prerequisites, 9 MCUs related documentation, 9 configuring, 39 documentation consistency groups, 17 website, 9 inflow control, 25 providing feedback, 1 1 initial copy operations, 19 initiator ports, 18 Number tree, 62 operations, 15, 71 failover, host, 19 pair split...
  • Page 115 pair status RCUs pairs, 48 configuring, 39 Continuous Access XP volumes, 27 deleting, 80 COPY, 28 inflow control, 25 deleting, 30 initiator ports, 18 icons, 58 Number tree, 62 PAIR, 28 operation pane, 61 PDUB, 29 operations, 15, 56, 71 PSUE, 29 options, 79 PSUS, 29, 30...
  • Page 116 57, 100 target ports, 18, 71 technical support HP, 10 websites service locator website, 1 1 , 1 1 timeout HP Subscriber's Choice for Business, 1 1 copy pending, 88, 89 product manuals, 9 ready, 27, 88, 89 1 16...

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Storageworks xp10000Storageworks svs200

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