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HP StorageWorksContinuous Access XP user guidefor the XP1024/XP128Part number: T1611-96002Second edition: March 2006

10Document conventions and symbolsCAUTION: Indicates that failure to follow directions could result in damage to equipment or data.IMPORTANT: Provides

100 Continuous Access XP for the XP1024/XP128Switching operations to remote sitesIf a disaster or failure occurs at the primary site, the first disast

Continuous Access XP user guide for the XP1024/XP128 101Analyzing consistency of Continuous Access XP Asynchronous S-VOLsTable 21 shows how to determi

102 Continuous Access XP for the XP1024/XP128Transferring operations back to primary sitesAfter applications are running at the secondary (remote) sit

Continuous Access XP user guide for the XP1024/XP128 1033. Split (pairsplit-r) all Continuous Access XP pairs at MCUs (original RCUs) to destage any p

104 Continuous Access XP for the XP1024/XP128NOTE: If you delete the Continuous Access XP Asynchronous volume pair, delete only the pair containing th

Continuous Access XP user guide for the XP1024/XP128 105IndexAAdd CT Group pane 68Async Option 70Asynchronous Operation pane 49audience, documentation

106Eerror codes 103ESCON connectionscomponents for 15configuring 37distances supported 17requirements 35system requirements 31Ffailover, host 18, 99fe

Continuous Access XP user guide for the XP1024/XP128 107Pairdisplay command 80Pairresync command 88Pairsplit-r command 85Pairsplit-r options 86Pairspl

108SMPLContinuous Access XP pair status 25pair status 25, 45Pairsplit-S command 90S-VOL consistency 101S-VOL currency 100Snapshot function 46SNMP trap

Continuous Access XP user guide for the XP1024/XP128 11Subscribing to this service provides you with e-mail updates on the latest product enhancements

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Continuous Access XP user guide for the XP1024/XP128 131 Continuous Access XP for the XP1024/XP128HP StorageWorks Continuous Access XP creates and mai

14 Continuous Access XP for the XP1024/XP128• ”Continuous Access XP Asynchronous recordset operations” on page 21• ”Continuous Access XP Asynchronous

Continuous Access XP user guide for the XP1024/XP128 15Figure 2 Continuous Access XP components for Serial (ESCON) connectionsXP1024/XP128Continuous A

16 Continuous Access XP for the XP1024/XP128information to be reported if a problem with a secondary volume or remote disk array occurs and provide di

Continuous Access XP user guide for the XP1024/XP128 17the remote site when needed. See ”Continuous Access XP Asynchronous consistency group operation

18 Continuous Access XP for the XP1024/XP128RCU target ports are (Continuous Access XP) dedicated Fibre Channel interface ports on the remote disk arr

Continuous Access XP user guide for the XP1024/XP128 19Remote copy operationsThere are two types of Continuous Access XP remote copy operations: initi

Legal and notice information© Copyright 2005, 2006 Hewlett-Packard Development Company, L.P.Confidential computer software. Valid license from HP requ

20 Continuous Access XP for the XP1024/XP128For asynchronous update copy mode, the MCU stores P-VOL updates with additional control information in cac

Continuous Access XP user guide for the XP1024/XP128 21to the MCU. When you resync a split Continuous Access XP pair that has the S-VOL write option e

22 Continuous Access XP for the XP1024/XP128Selecting and settling recordsets at the RCUThe RCU selects recordsets to be promoted to formal data (or “

Continuous Access XP user guide for the XP1024/XP128 23Inflow control by MCUWhen the amount of MCU sidefile cache reaches the user-specified threshold

24 Continuous Access XP for the XP1024/XP128Group optionsContinuous Access XP provides the following options for each consistency group: copy pending

Continuous Access XP user guide for the XP1024/XP128 25Continuous Access XP volume pair statusContinuous Access XP displays pair status for each volum

26 Continuous Access XP for the XP1024/XP128PSUS(pair suspended-split)(see Table 6 on page 27 for split types)Pair is not synchronized because you spl

Continuous Access XP user guide for the XP1024/XP128 27Continuous Access XP split types (PSUS)Table 6 describes Continuous Access XP split types. You

28 Continuous Access XP for the XP1024/XP128Table 7describes the consistency status for split or suspended Continuous Access XP Async S-VOLs (consiste

Continuous Access XP user guide for the XP1024/XP128 29When a Continuous Access XP Asynchronous (Continuous Access XP Async) pair is suspended, the MC

Continuous Access XP user guide for the XP1024/XP128 3About this guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30 Continuous Access XP for the XP1024/XP128If a recordset is lost in transmission from the MCU to the RCU, the MCU’s cylinder bitmap ensures the miss

Continuous Access XP user guide for the XP1024/XP128 31• For distances greater than 11 km, approved third-party channel extender (or DWDM) products an

32 Continuous Access XP for the XP1024/XP128Continuous Access XP, a LUSE P-VOL must be paired with an S-VOL of the same size and structure. For exampl

Continuous Access XP user guide for the XP1024/XP128 33CAUTION: If Continuous Access XP S-VOLs are physically attached to the same host servers as Con

34 Continuous Access XP for the XP1024/XP128”Fibre Channel remote copy connections” on page 34 for remote copy configurations. Distribute paths betwee

Continuous Access XP user guide for the XP1024/XP128 35• Switch connection: Up to three optical fibre cables (per hard zone) are connected via switche

36 Continuous Access XP for the XP1024/XP128You can install dedicated ESCON channels or use existing ESCON channels connected by ESCDs. Logical paths

Continuous Access XP user guide for the XP1024/XP128 37ESCDs can accommodate channel-to-MCU and channel-to-RCU connections in addition to remote copy

38 Continuous Access XP for the XP1024/XP1287. Register the RCUs to the current MCU CU image by using the Add RCU pane. Set the options for the regist

Continuous Access XP user guide for the XP1024/XP128 399. When you are finished configuring this MCU, exit the Continuous Access XP main pane, and dis

4Cache and nonvolatile storage (NVS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Host failover softwar

40 Continuous Access XP for the XP1024/XP128S-VOL using the S-VOL’s LDEV ID in the host command. The BC remote console software displays the LDEV ID a

Continuous Access XP user guide for the XP1024/XP128 41• Figure 17 combines the configurations shown in the two previous figures. Within a single Cont

42 Continuous Access XP for the XP1024/XP128NOTE: Partition-level users in the StorageAdmins group cannot perform Continuous Access XP operations. For

Continuous Access XP user guide for the XP1024/XP128 43NOTE: The scripting function is not supported for this version.Continuous Access XP main pane (

44 Continuous Access XP for the XP1024/XP128The Continuous Access XP main pane contains the following items:• CU Number/Port Number tree: Subsystem fo

Continuous Access XP user guide for the XP1024/XP128 45• Status: See ”Continuous Access XP volume pair status” on page 25 for further information abou

46 Continuous Access XP for the XP1024/XP128When you select the CU number or Port number on the CU Number/Port Number tree on the Continuous Access XP

Continuous Access XP user guide for the XP1024/XP128 47NOTE: You can use the snapshot function only while client file access is enabled. When client f

48 Continuous Access XP for the XP1024/XP128The RCU Operation pane is updated when the tab is switched from one to another, Refresh is clicked, and se

Continuous Access XP user guide for the XP1024/XP128 49• CU#: CU number selected on the tree.• Type: MCU or RCU.• S/N and SSID: Serial number and SSID

Continuous Access XP user guide for the XP1024/XP128 5Preparing for Continuous Access XP volume pair operations . . . . . . . . . . . . . . . . . . .

50 Continuous Access XP for the XP1024/XP128The Asynchronous Operation pane is updated when the tab is switched from one to another, Refresh is clicke

Continuous Access XP user guide for the XP1024/XP128 51• CLPR: Number and name of the CLPR to which the volumes forming the pair belong. If the consis

52 Continuous Access XP for the XP1024/XP128The History Operations pane is updated when the tab is switched from one to another, Refresh is clicked, a

Continuous Access XP user guide for the XP1024/XP128 53• VOL: CU number and LDEV number of operated volume.• Paired VOL: CU number and LDEV number of

54 Continuous Access XP for the XP1024/XP128To set a disk array as an MCU, configure MCU ports.Configuring MCU portsAll Fibre Channel interface ports

Continuous Access XP user guide for the XP1024/XP128 55• Initiator, RCU Target, and Target for fibre• RCP and LCP for serial (see ”Port change operati

56 Continuous Access XP for the XP1024/XP128• Minimum Paths: Minimum number of paths required for selected RCU connected to the MCU.• Maximum Initial

Continuous Access XP user guide for the XP1024/XP128 57NOTE: If four RCUs (maximum number of RCUs you can register) are already registered, you cannot

58 Continuous Access XP for the XP1024/XP128• Cancel button: Cancels settings made on the Add RCU pane, and closes the pane.Figure 30 RCU Option paneU

Continuous Access XP user guide for the XP1024/XP128 59Registering RCUs to the connected MCU1. Ensure that remote copy connections and MCU ports are p

618 Shared BC S-VOL/Continuous Access XP P-VOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4119 Continuous Access

60 Continuous Access XP for the XP1024/XP128• Min.Path: Minimum number of paths required for each RCU connected to the current MCU• Activity: Number o

Continuous Access XP user guide for the XP1024/XP128 61• MIH Time: Time value for the remote I/O (RIO) missing interrupt handler (MIH)• Path Watch: Ti

62 Continuous Access XP for the XP1024/XP128Figure 35 Add RCU pane used for configuration in Figure 34Adding and deleting logical paths for RCUs (Add

Continuous Access XP user guide for the XP1024/XP128 63NOTE: You can select the port number from the drop-down list, or enter it directly. When you en

64 Continuous Access XP for the XP1024/XP128Adding and deleting SSIDs for RCUs (Add SSID/Delete SSID)Before adding an SSID, ensure that the remote cop

Continuous Access XP user guide for the XP1024/XP128 65Port change operationUse the RCU Operation tab to change the port mode. Clicking Port in the Sw

66 Continuous Access XP for the XP1024/XP128Modifying parameters and deleting settingsAfter RCU, Path, and SSID operations, parameters can be modified

Continuous Access XP user guide for the XP1024/XP128 67NOTE: After being set, options can be modified and canceled (see ”Modifying parameters and dele

68 Continuous Access XP for the XP1024/XP128Adding consistency groups (Add CT Group)Use the Add CT Group command to add a consistency group to the con

Continuous Access XP user guide for the XP1024/XP128 69NOTE: After being set, options can be modified and canceled (see ”Modifying parameters and dele

Continuous Access XP user guide for the XP1024/XP128 717 Remote copy I/O statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

70 Continuous Access XP for the XP1024/XP1284. From the Consistency Group list, click the consistency groups to be modified. Select more than one cons

Continuous Access XP user guide for the XP1024/XP128 71array. Async options apply to the entire physical control unit, including all Continuous Access

72 Continuous Access XP for the XP1024/XP128NOTE: Specify a value not exceeding the I/O Delay Increase for the I/O Delay Start. Specify a value not ex

Continuous Access XP user guide for the XP1024/XP128 73For the CT Group operation, the Cancel All command deletes all consistency groups on the list,

74 Continuous Access XP for the XP1024/XP1283. Right-click the graph area, and click Display Item. The Display Item pane appears.Figure 45 Display Ite

Continuous Access XP user guide for the XP1024/XP128 75• To stop displaying all graphs, click Close All. The usage monitor graph closes automatically

76 Continuous Access XP for the XP1024/XP128• Stopping the usage monitoring function by clicking Stop in the Operation drop-down list, and clicking Ap

Continuous Access XP user guide for the XP1024/XP128 77Discontinuing Continuous Access XP operationsIf you plan to use Continuous Access XP for nondis

78 Continuous Access XP for the XP1024/XP1285. For Fibre Channel interface, reset initiator ports to ordinary targets at MCUs (see ”Port change operat

Continuous Access XP user guide for the XP1024/XP128 79• Pairdisplay: Displays LU status (see ”Viewing Continuous Access XP pair status for LUs and LD

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80 Continuous Access XP for the XP1024/XP128The Cancel All command deletes all LUs listed on the Pair Settings Parameter list, and all LUs are removed

Continuous Access XP user guide for the XP1024/XP128 81• P-VOL Fence Level: Conditions under which the MCU rejects write operations to the P-VOL.• Nev

82 Continuous Access XP for the XP1024/XP128• P-VOL: Port - Group - LUN of the primary volume (P-VOL), CLPR number, and CLPR name.NOTE: If # is added

Continuous Access XP user guide for the XP1024/XP128 832. Connect to the disk array containing P-VOLs of the pairs you are creating, and start Continu

84 Continuous Access XP for the XP1024/XP128• Type: Synchronous or Asynchronous of the pair created.• Mode: Entire: Copy all cylinders. No Copy: Do no

Continuous Access XP user guide for the XP1024/XP128 85For example, suppose the maximum initial copy activity setting is four, and you add six Continu

86 Continuous Access XP for the XP1024/XP128information about split Continuous Access XP pairs, see ”Continuous Access XP split types (PSUS)” on page

Continuous Access XP user guide for the XP1024/XP128 87• Pending Update:Drain: The MCU changes the Continuous Access XP Async pair status from Suspend

88 Continuous Access XP for the XP1024/XP128When the Pairsplit-r pane closes, the list changes to the Pair Settings Parameter list (Pairsplit-r). Figu

Continuous Access XP user guide for the XP1024/XP128 89• P-VOL: Port - Host group - LUN of the selected volume.NOTE: If # is added to the end of the L

Continuous Access XP user guide for the XP1024/XP128 9About this guideThis guide provides information about the following:• ”Overview of Continuous Ac

90 Continuous Access XP for the XP1024/XP128NOTE: After being set, options can be modified and canceled (see ”Modifying parameters and deleting LUs” o

Continuous Access XP user guide for the XP1024/XP128 91Delete a Continuous Access XP pair from the RCU only for disaster recovery (see ”Continuous Acc

92 Continuous Access XP for the XP1024/XP128CAUTION: Do not use this option when deleting pairs at the RCU during disaster recovery. This option is av

Continuous Access XP user guide for the XP1024/XP128 93When the Pairsplit-S pane closes, the list changes to the Pair Settings Parameter list (Pairspl

94 Continuous Access XP for the XP1024/XP1282. From the CU Number/Port Number tree on the Continuous Access XP main pane, click the number of the corr

Continuous Access XP user guide for the XP1024/XP128 952. Connect to the disk array containing volumes to be migrated, and start Continuous Access XP.

96 Continuous Access XP for the XP1024/XP128If power is removed from an RCU or remote copy connection while Continuous Access XP operations are in pro

Continuous Access XP user guide for the XP1024/XP128 97Continuous Access XP disaster recovery operationsPreparing for disaster recoveryThe type of dis

98 Continuous Access XP for the XP1024/XP128NOTE: The P-VOL fence-level setting does not apply to Continuous Access XP Asynchronous pairs. Continuous

Continuous Access XP user guide for the XP1024/XP128 99by means of multiplication can function with the Data fence-level setting. For example, Oracle