Hp XP7 Storage Uživatelský manuál

XP7 Continuous Access Journal forMainframe Systems User GuideAbstractThis document describes and provides instructions for using Continuous Access Jou

Replication occurs in the following sequence:1. Journal obtain - When the host sends an update to the primary volume (P-VOL), the primarysystem’s jour

Procedure 34 To change the data-transfer threshold time1. In the Storage System tree, click Replication > Remote Connections.2. In the Remote Conne

5. Click Finish.6. In the Confirm window, review the settings and enter a task name in the Task Name box.7. Click Apply to save your settings to the s

5. Click Finish.6. In the Confirm window, review the settings and enter a task name in the Task Name box.7. Click Apply to save your settings to the s

When power is removed from network relay devicesIf power is removed from a network relay device during remote copy operations, the primary andsecondar

6. When the secondary system is ready to resume copy operations, power on the primary system.CAUTION: Wait five (5) minutes after powering on a system

10 Cnt Ac-J Z disaster recovery operationsThis chapter provides instructions for performing disaster recovery.In addition to general recovery planning

You detect and re-create lost updates by checking database log files and other current informationat the local site. Journal log file entries for most

2. Bring up the host servers at the local site.3. Make sure that all Cnt Ac-J Z components are operational.4. Do all of the following, as applicable:1

recovery procedures for resuming host operations at a backup site and then restoring the originalsystem and configurations.• “Recovery for 3 Cnt Ac-J

Depending on the result, proceed as follows:If the original Cnt Ac-S Z data flow reverses1. Re-create the Cnt Ac-J Z pair using the YKMAKE command fro

An error reporting communications (ERC) feature is also required when Continuous Access JournalZ is to be used for disaster recovery.Continuous Access

Recovering from local and remote site failure (3DC multi-target)Host operations are transferred to the Continuous Access Journal Z S-VOL in the remote

the delta resync operation. When the failure at the local site is corrected, host operations aretransferred back to the local site and the delta resyn

If pair status is not Hold, match the pair’s actual statuses in the following table and then performthe corrective action.Corrective actionCurrent sta

11 Cnt Ac-J Z troubleshootingThis chapter provides Continuous Access Journal Z troubleshooting information.General troubleshootingWhen an error occurs

Corrective actionErrorThe pair create or pair resync operation resulted ina timeout error.• If the timeout error was caused by a hardware failure, a S

Remote paths status probelmsTroubleshooting information for remote paths between storage systems is shown below.Corrective actionDescriptionPath statu

Corrective actionDescriptionPath statusThe secondary system's S/Ndoes not match the specifiedS/N.Serial NumberMismatch• Make sure that you entere

Corrective actionDescriptionPath statusRestore the path*.A program error is detected.Program Error* To restore a path, delete and then add the path ag

Corrective ActionDescriptionApplies toSuspend TypeICKDSF. Restart the initial copy operation(Create Pairs window).None. The primary system automatical

Troubleshooting with RAID ManagerWhen an error has occurred in Continuous Access Journal Z pair operation when using RAIDManager, you can identify the

◦ Restore journal data copy to the S-VOL◦ Pair status management and configuration (for example, rejecting write I/Os to the S-VOLsby way of command r

DescriptionError code (SSB2)The Paircreate or Pairresync command was rejected because the journal volume in the specifiedmaster journal was blocked.37

DescriptionError code (SSB2)The pair cannot be created because the specified P-VOL is one of the following:8F10• A BC Z S-VOL that is not in Split/SUS

DescriptionError code (SSB2)The pair cannot be created because the status of the configuration could not be transited.8F53The pair cannot be created o

DescriptionError code (SSB2)A request for status change was rejected because the status could not be changed (for example:the pair volumes were not un

DescriptionError code (SSB2)The command was rejected because the specified secondary journal is already a secondaryjournal in another mirror.E898The c

DescriptionError code (SSB2)The command was rejected because the state of S-VOL was not SSWS.EA25The command was rejected because the state of master

DescriptionError code (SSB2)The command was rejected because the specified P-VOL or S-VOL is in the process of having thecapacity changed by Thin Prov

DescriptionError code (SSB2)The command was rejected because the access attribute was set to the specified P-VOL or S-VOLby the Data Retention.EB5BThe

DescriptionError code (SSB2)• Cnt Ac-J Z P-VOL and S-VOL are THP V-VOL, and the specified S-VOL is the source volume ofAuto LUN.• Cnt Ac-J Z P-VOL and

DescriptionError code (SSB2)The command was rejected because the processing load of the storage system is heavy. Pleaseexecute the command again after

Figure 3 JournalsData pathThe physical transmission link between the primary and secondary systems is called the data path.Continuous Access Journal Z

Continuous Access Journal Z SIMs are displayed in the Remote Web Console Status window.• SIMs generated by the primary system include the P-VOL device

SVP log fileSystem generating theSIMDescriptionSeverityReference codeByte 23Byte 22LocalYes, repeatedly.A delta resync P-VOL has beensuspended.Serious

12 Support and other resourcesContacting HPFor worldwide technical support information, see the HP support website:http://www.hp.com/supportBefore con

HP websitesFor additional information, see the following HP websites:• http://www.hp.com• http://www.hp.com/go/storage• http://www.hp.com/service_loca

Table 11 Document conventions (continued)ElementConventionMonospace text• File and directory names• System output• Code• Commands, their arguments, a

A Sharing Cnt Ac-J Z volumesThis appendix discusses XP7 Storage software volumes that can be shared with Continuous AccessJournal Z volumes.Note that

Table 12 Volume types that can be shared with Cnt Ac-J Z (continued)Used as Cnt Ac-J Zjournal volume?Used as Cnt Ac-J ZS-VOL?Used as Cnt Ac-J ZP-VOL?V

Table 12 Volume types that can be shared with Cnt Ac-J Z (continued)Used as Cnt Ac-J Zjournal volume?Used as Cnt Ac-J ZS-VOL?Used as Cnt Ac-J ZP-VOL?V

◦ LDEVs are blocked.◦ The secondary system does not support FC Z.• If the P-VOL of the Cnt Ac-J Z pair in the status of Duplex or the Pending Duplex i

• When a THP V-VOL is used for a Cnt Ac-J Z P-VOL or S-VOL, the Cnt Ac-J Z of the allocatedpages for the THP V-VOL is included in the Cnt Ac-J Z licen

Reference InformationThe following topics describe Cnt Ac-J Z copy operations and other features.Overview of copy operationsinitial and update copy op

assigned to a Continuous Access Journal Z pair, the S-VOL must have the same capacity asthe P-VOL.• To perform Virtual LVI operations on a pair’s P-VO

B Configurations with Continuous Access Synchronous ZContinuous Access Journal Z and Continuous Access Synchronous Z can share the same datavolumes. U

Figure 18 3-data-center cascade configurationFailure recovery occurs as follows:• If a failure occurs at the Cnt Ac-S Z P-VOL, business continues beca

• The response time for host I/Os will be the response time for Cnt Ac-S Z operation plus thecreation time of journal data in the intermediate site.•

is paired with the Cnt Ac-J Z S-VOL.See “Delta resync configuration ” (page 144) for moreinformation.• If a failure occurs in the Cnt Ac-S Z system (P

You create the delta resync configuration by adding a second Cnt Ac-J Z pair to the 3DC multi-targetconfiguration, using the Cnt Ac-S Z S-VOL and the

• If you plan to create in-system pairs on the remote site sharing the delta resync S-VOL, makesure to perform the delta resync create-pair operation

Figure 20 Remote command devices in a delta resync configurationWhen mapping to remote command devices on each site is complete, you must assign mirro

• On local site:- Assign mirror ID 0 to the remote command device that is mapped to the Cnt Ac-S Zremote site.- Assign the mirror ID used for the Cnt

4. In the Release Remote Command Devices window, review your selection in the Selected Mirrorstable. If you need to make a change, select Cancel.5. Wh

The secondary system updates the S-VOL according to the write sequence number in the journaldata. This maintains data consistency between P-VOL and S-

◦ The Cnt Ac-J Z delta resync pair: Hold or Holding. If the pair status is Hlde, change toHold by performing the pairresync operation.This applies to

• When the delta resync pair is created and no volumes (including volumes after failover orfailback) in the local site are updated.• When the status o

C Configurations with Business Copy ZContinuous Access Journal Z and Business Copy Z can share the same data volumes to providemultiple copies of data

Figure 21 Shared Cnt Ac-J Z and BC Z primary volumeBusiness Continuity Manager allows you to set the starting time of the backup copy to journals.In t

Figure 23 Shared Cnt Ac-J Z volumes with BC Z primary volumesConfigurations with Business Copy Z secondary volumesThe following figure shows a BC Z pr

D Cnt Ac-J Z GUI referenceThis appendix describes the Continuous Access Journal Z windows, dialog boxes, fields, andbehaviors in the Remote Web Consol

DescriptionItemTotal capacity of all the associated volumes. If the journal uses multiple mirror IDs, the capacityof volumes in mirrors with Hold, Hol

DescriptionItemECXTG attributes, which can be:Attribute• Master: Primary system EXCTG• Restore: Secondary system EXCTG• Initializing: Initialization i

Mirrors tabFrom this tab, you can review information about the selected journal’s mirrors.DescriptionItemMirror identifier.Mirror IDWhether the journa

DescriptionItemInterval from the time a path becomes blocked to the time when the mirror is suspended. Ahyphen indicates the status of the secondary m

2 Requirements and specificationsThis chapter provides system requirements for Continuous Access Journal Z.System requirementsContinuous Access Journa

DescriptionItemJournal volume’s CLPR number. The ID displays before the colon; the CLPR name displays afterthe colon.CLPRLDEV’s resource group name an

DescriptionItemWhether journal data is stored in cache memory on the remote side (restore journal).Cache ModeCnt Ac-J Z only.Timer TypeType of clock u

SettingsDescriptionItemStorage system type: Open or Mainframe.System TypeIdentifier for the journal, displayed in ascending order. Blank if no number

DescriptionItemWhether to store journal data in cache memory on the remote side.Cache Mode• Enable: Data is stored in cache.• Disable: Data is not sto

Select Journal Volumes dialog boxAvailable LDEVs tableDescriptionItemJournal volume’s identifier consisting of the LDKC number, CU number, and LDEV nu

DescriptionItemJournal volume’s CLPR number. The ID displays before the colon; the CLPR name displays afterthe colon.CLPRLDEV’s resource group name an

Assign Journal Volumes wizardUse this wizard to assign journal volumes to a journal.Assign Journal Volumes windowUse this window to assign journal vol

DescriptionItemLDEV's resource group name and ID (in parentheses).Resource GroupName (ID)Wether the journal volumes can be removed (Yes or No). I

DescriptionItemJournal volume capacity.CapacityJournal volume’s CLPR ID and name.CLPRLDEV's resource group name and ID (in parentheses).Resource

DescriptionItemJournal identifier.Journal IDJournal copy type, Cnt Ac-J or Cnt Ac-J Z. If the pair is part of a 2DC cascade configuration,“2DC cascade

Table 1 General system requirements (continued)RequirementItemContinuous Access Journal Z• Must be installed on primary and secondary XP7 systems.• Li

DescriptionItemJournal identifier.Journal IDMirror identifierMirror IDEXCTG Setting• EXCTG ID: EXCTG identifier• Super DKC: Super DKC’s serial number

DescriptionItemWhether flow of update data to the journal volume is restricted by slowing the response to hosts.Inflow ControlNumber of seconds the sy

DescriptionItemNumber of journal volumes registered in the journal.Number of JournalVOLsTotal capacity of the journal’s journal volumes.Journal Capaci

Confirm windowDescriptionItemJournal identifier.Journal IDJournal copy type, Cnt Ac-J or Cnt Ac-J Z. If the pair is part of a 2DC cascade configuratio

DescriptionItemInterval from the time a path becomes blocked to the time when the mirror is suspended.Path Watch TimeWhether to assign the master jour

Confirm windowDescriptionItemJournal identifier.Journal IDMirror identifier.Mirror IDJournal copy type, Cnt Ac-J or Cnt Ac-J Z. If the pair is part of

DescriptionItemTotal capacity of all the associated volumes. If the journal uses multiple mirror IDs, the capacityof volumes in mirrors with Hold, Hol

Confirm windowDescriptionItemJournal identifier.Journal IDMirror identifier.Mirror IDLDKC, CU, and LDEV numbers of the remote command device assigned

Selected Mirrors tableDescriptionItemJournal identifier.Journal IDMirror identifier.Mirror IDLDKC, CU, and LDEV numbers of the remote command device a

DescriptionItemEXCTG identifier.EXCTG IDECXTG attributes.Attribute• Master: Primary system's EXCTG• Restore: Secondary system's EXCTG• Initi

Table 1 General system requirements (continued)RequirementItemGroups of remote paths, which allows you to configure or change the configurationof mult

DescriptionItemWhether or not to register the local storage system’s journals to EXCTGs.Add Local StorageSystem’s JournalsMirror identifier for the jo

DescriptionItemJournal’s identifier.Journal IDNumber of selected journals in relation to the total number of journals..SelectedConfirm windowSelected

Selected Journals tableDescriptionItemEXCTG identifier.EXCTG IDJournal’s identifier.Journal IDRemove Journal wizardUse this wizard to remove journals

Remote Command DeviceDescriptionItemRemote command device LDKC number, CU number, and LDEV number.Remote CommandDeviceA hyphen (-) displays for a loca

DescriptionItemEXCTG identifier.EXCTG IDStorage system’s model and serial number.Model / SerialNumberJournal’s identifier.Journal IDMirror’s identifie

DescriptionItem- Only attributes that are specified display.- “CVS” displays at the end of the device name, if the virtual CVS attribute is specified.

Pair PropertiesDescriptionItemDisplays pair information about the storage system you have accessed in Remote Web Console.Local Storage Systembox• LDEV

DescriptionItem• Emulation type, Capacity: System's volume emulation type and capacity.• Journal ID: Journal identifier.• Model/Serial number: Sy

For full information, see the procedure in “Splitting Cnt Ac-J Z pairs ” (page 71).Selected Pairs tableDescriptionItemDisplays the following informati

SettingsDescriptionItemWhether data can be written to the S-VOL while the pair is split.Secondary VolumeWrite• Enable: Data can be written to the S-VO

Table 1 General system requirements (continued)RequirementItemSupported RAID groups• RAID1, RAID5, and RAID6 are supported for both data and journal v

DescriptionItemWhether update data is written to S-VOLs in the mirror before the split operation.Split Mode• Flush: Data is copied to S-VOLs.• Purge:

DescriptionItemJournal copy type, Cnt Ac-J or Cnt Ac-J Z, plus one of the following journal type options:Journal Type• Standard, a normal pair• 2DC ca

Confirm windowSelected Mirrors tableDescriptionItemJournal identifier.Journal IDMirror’s identifierMirror IDJournal copy type, Cnt Ac-J or Cnt Ac-J Z,

DescriptionItemDisplays the following information about pair volumes in the system connected to the systemyou accessed.Remote StorageSystem• Model/Ser

Selected Pairs tableDescriptionItemDisplays the following information about pair volumes in the accessed system.Local Storage System• LDEV ID: Pair vo

Confirm windowDescriptionItemDisplays the following information about pair volumes in the accessed system.Local Storage System• LDEV ID: Pair volume L

Resync Mirrors wizardUse this wizard to resynchronize mirrors.Resync Mirrors windowUse this window to resynchronize mirrors.For full information, see

DescriptionItemNumber of volumes associated with the journal.Number of DataVOLsTotal capacity of all the data volumes. If the journal uses multiple mi

DescriptionItem• Capacity: Pair volume capacity.• CLPR: CLPR number.Type of pair:Copy Type• Cnt Ac-J: Continuous Access Journal• Cnt Ac-J Z: Continuou

Delete Mirrors wizardUse this wizard to delete mirrors.Delete Mirrors windowUse this window to delete mirrors.For full information, see the procedure

© Copyright 2014 Hewlett-Packard Development Company, L.P.Confidential computer software. Valid license from HP required for possession, use or copyin

Table 2 SAID values for PATH LINK (CL1) (continued)SAIDPortPackglocalSAIDPortPackglocalSAIDPortPackglocalSAIDPortPackglocalX'008A'CL9-L1PHX&

DescriptionItemLDEV number of the remote command device if it is assigned to the mirror.Remote CommandDevice• The column is blank if the remote comman

DescriptionItemShows whether mirrors are deleted forcibly or not.Delete ModeDisplays the following information about pair volumes in the system connec

DescriptionItemWhether CFW data is copied to the S-VOL or not.• Primary Volume Only: Data is not copied to the S-VOL.• Secondary Volume Copy: Data is

DescriptionItemWhether CFW data is copied to the S-VOL or not.• P-VOL Only: Data is not copied to the S-VOL.• Copy to S-VOL: Data is copied to the S-V

Glossaryallocation The ratio of allocated storage capacity versus total capacity as a percentage. Allocated storagerefers to those logical devices (LD

to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible for applications to accessa single large pool of storage.M-VOL Main volume.MC

IndexSymbols3 data center configurations, 141AAuto LUN, 140Auto LUN V2 volumes, 136BBCM specifications, 19Business Copy Z volumes, 135, 152business re

Iinitial copy overview, 14initiator port, 46Jjournal copy, 10journal obtain, 10journal restore, 10journal status definitions, 88journal volumesadding

a pair, 74reverse copy direction to primary site, 106RIO MIH, 63role required for operations, 61rolling averages and cycle time, 44RPO, 23SS-VOL, taki

Table 3 SAID Values for PATH LINK (CL2) (continued)SAIDPortPackglocalSAIDPortPackglocalSAIDPortPackglocalSAIDPortPackglocalX'009A'CLA-L2PHX&

3 Planning volumes, XP7 systemsThis chapter provides information and instructions for planning Continuous Access Journal Z volumes,XP7 systems, and ot

To ensure that journals can hold the amount of data that could accumulate, they must be sizedaccording to the following:• The maximum amount of time t

1. Using your performance monitoring software, collect the following:• Disk-write bytes-per-second (MB/s) for every physical volume that will be repli

HP recommends a capacity of 6 GB or more. Journal volumes cannot be registered if capacity islower than 1.5 GB.To calculate journal size1. Follow the

• Review journal specifications in “System requirements” (page 16).• A journal can contain a maximum of 2 journal volumes.Planning journal volumesIn a

Planning pair volumesThe following information can help you prepare volumes for configuration. Also, see systemrequirements and specifications in “Req

Table 4 Data and journal volume specificationsSupport specificationsTypeJournal volumeData volumeUnavailableAvailableVirtual LVI volumeUnavailableAvai

Calculating maximum number of pairsNOTE: In the calculations below, note the following:• ceil () indicates that the value between the parentheses shou

Contents1 Continuous Access Journal Z overview ...9Continuous Access Journal Z software ...

The maximum number of pairs is determined by the following:• The number of bitmap areas required for Continuous Access Journal Z (calculated above).•

If you perform a pair operation for multiple pairs (for a specific kind of data, for example), andthen perform another operation for multiple pairs (f

Sharing volumes with other XP7 software volumesContinuous Access Journal Z volumes can be shared with other product volumes. Sharing pairvolumes enhan

S-VOLs in chronological order (older data are restored earlier). This ensures that the update sequenceis maintained. For details on the time stamping

• The recommended method for executing RAID Manager commands is the in-band (host-based)method. This prevents I/O response from deteriorating, which m

By using fibre-channel switches, target ports can also be connected to secondary system targetports on the secondary systems. See “Planning ports for

Planning for previous modelsYou can pair XP7 volumes with P9500 and XP24000/XP20000 Disk Array volumes.Observe the following:• Configure a remote path

Continuous Access Synchronous Z and Continuous Access Journal Z systems. See“Configurations with Continuous Access Synchronous Z” (page 141) to review

Table 6 System option modesDescriptionModeMode 20 ON: Enables the read option and VOLSER of the suspended S-VOL to beupdated.20Mode 20 OFF: Normal ope

Table 6 System option modes (continued)DescriptionModeWith mode 474 set to ON, improves the initial copy time for a Cnt Ac-J Z pair, byusing the Cnt A

Establishing connections between multiple secondary systems ...34Multiple journals per RAID Manager cons

4 Planning the data pathA data path must be designed to manage your organization’s throughput to the remote site. Thebandwidth, number of ports, and f

the journals will be completely emptied to the S-VOL only occasionally. If bandwidth is sizedbelow average write-workload, the journals never fully dr

3. With a base bandwidth value established, make adjustments for growth and a safety factor.• Projected growth rate accounts for the increase expected

Sizing bandwidth for peak rolling average write-workloadSizing bandwidth 43

1. Using write-workload data imported into a spreadsheet and your RPO, calculate writerolling-averages.For example, if RPO time is 1 hour, then 60-min

2. From the spreadsheet or graph, locate the largest or highest rolling average value. This is thepeak rolling average, which indicates the base amoun

The secondary system initiator port sends journal query commands to the primary RCU target port.The data is then sent through these ports — that is, f

Cable length and switch requirementsMultimode or single-mode optical fiber cables are required on primary and secondary systems.The type of cable and

Supported data path configurationsThe remote data path can be configured using one of the following connection types. For a switchconnection, you must

Figure 11 Switch connection configurationFigure 12 Extender connection configurationNOTE: When a primary and secondary system are connected using swit

Pair status definitions...80Additional informat

5 Using extended consistency groupsWhen performing Continuous Access Journal Z operations between multiple primary and secondarystorage systems, the j

Consistency timeConsistency time. Remote Web Console displays the consistency times of EXCTGs and pairs in theCnt Ac-J Z windows.• An EXCTG’s consiste

Prerequisite information• Primary and secondary EXCTGs can be set up using Business Continuity Manager prior toregistering journals, or by using Remot

Additional journals tables display if the EXCTG contains registered journals.6. Add Local Storage System Journals is initially set to No, which indica

The selected journals display in the Journals table on the Add Journals window. Yes indicatesthe journals can be registered (not previously registered

Splitting, restoring, releasing pairs in an EXCTGWith Business Continuity Manager, you can split, restore, and release all pairs in an EXCTGcollective

Removing journals from an EXCTGYou can release journals as follows:• Single, multiple, or all journals from an EXCTG or from all EXCTGs.• All journals

Procedure 3 To remove all journals from an EXCTG1. In the Storage System tree, click Replication > Journal.2. Select the EXCTGs tab.3. Click Initia

in XP7, P9500, and XP24000/XP20000 Disk Array can be specified as EXCTGs. This isshown in Figure 15 (page 58).• When the supervisor DKC is P9500 or XP

Figure 16 Journals that can be registered when P9500 or XP24000/XP20000 Disk Array is thesupervisor DKCRestoring journals manuallyNormally, Cnt Ac-J Z

11 Cnt Ac-J Z troubleshooting...113General troubleshooting...

time. In the Figure 13 (page 50) example, journal 2 has the oldest timestamp, 14:02. Therefore,you must restore the following data to the S-VOLs:• Dat

6 Cnt Ac-J Z configuration operationsThis chapter provides instructions for configuring Continuous Access Journal Z.Configuration workflowSetup for Co

2. Select the Ports tab.3. In the list, click the port whose attribute you want to change4. From the Actions menu, click Ports/Host Groups > Edit P

5. In the Remote Storage System box, for Model, select the secondary storage system model andnumber.6. For Serial Number, enter one of the following s

Configuring additional remote pathsYou can configure additional remote paths as needed. A maximum of eight remote paths aresupported.Prerequisite info

Prerequisite information• Review the following:“System requirements” (page 16)◦◦ “Planning journals ” (page 25)◦ “Planning journal volumes ” (page 26)

7. In the Select Journal Volumes dialog box, from the Available LDEVs table, select the journalvolumes to be registered to the journal, and click the

- Disable: Journal data will not be stored in cache but in the journal volume. Disable is theonly setting possible for non-RAID-5 or RAID-6 journal vo

7 Cnt Ac-J Z pair operationsThis chapter provides instructions for performing Continuous Access Journal Z pair operations.Pair operations workflowA ty

• You will assign a mirror ID to the pair. This identifies the pair within the journal. A mirror refersto the pair within the journal.• If the mirror

Journal Properties window...160Create Journals wizar

4. For Remote Storage System, select the secondary system’s Model/Serial Number and PathGroup ID.• If the mirror contains an existing pair, the same M

11. Click Finish.12. In the Confirm window, review the settings and enter a task name in the Task Name box.13. Click Apply to save your settings to th

5. For Secondary Volume Write, specify whether data can be written to the S-VOL while it is split.Available only when performing the split operation f

5. For Secondary Volume Write, specify whether data can be written to S-VOLs in the mirrorwhile it is split.• Enable: The host writes data to S-VOLs i

Resynchronizing Cnt Ac-J Z pairsResynchronizing a pair updates the S-VOL with differential data that accumulated since the pairwas split. After the pa

4. For Copy Priority list, specify the scheduling order for resynchronizing selected pairs, between0 and 256 .5. For Error Level, specify the system r

4. In the Resync Mirrors window, review the mirrors in the Selected Mirrors table. You can removea mirror from the table by selecting it and clicking

You can estimate whether the I/O load is heavy or not from frequency of host I/Os. Thisoperation should be performed under light I/O load conditions.•

If a journal includes two mirrors:• If you specify a mirror in Hold, Holding, or Hold(Failure) status, only the Cnt Ac-J Z pairs ofthe specified mirro

8 Monitoring the Cnt Ac-J Z systemMonitoring pairs, journals, data paths, I/O, and hardware performance is crucial for ensuringthat Continuous Access

Confirm window...202Glossary...

5. To review license capacity, see the Summary area in the Replication window.Pair status definitionsBoth Remote Web Console and Business Continuity M

S-VOL accessP-VOL accessDescriptionBCM statusRWC statusSWAPPING(04):Read/WriteThe pair has been suspended by the user and the P-VOLand S-VOL are no lo

S-VOL accessP-VOL accessDescriptionBCM statusRWC statusthe primary system continues beyond the backuptime for the nonvolatile memory.• SUSPER (50): Th

S-VOL accessP-VOL accessDescriptionBCM statusRWC status--Although the user performed the data resync, differencedata between the master journal and re

A pair can also be suspended by the primary or secondary system. Suspensions occur for thefollowing conditions:• When the primary system detects that

Table 8 Suspended S-VOL consistency statusDescriptionConsistency statusThis Cnt Ac-J Z volume pair was suspended alone. Update sequence consistencybet

• The journal data that reached the secondary system but have not yet been settled. After markingthese S-VOL tracks as modified, the secondary system

DescriptionOperation DisplayedRestoring of the pair was finished.Resume Pair CompleteSplitting (Suspending) of the pair was started.Suspend Pair Start

DescriptionOperation DisplayedThe status of the pair was changed from Hold to Duplex becauseof an operation from the primary system.Status Change by M

DescriptionStatusAn operation for splitting or deleting the mirror is in progress.StoppingAn operation for splitting or deleting the mirror is finishe

1 Continuous Access Journal Z overviewWith Continuous Access Journal Z (Cnt Ac-J Z), you create and maintain a remote copy of a datavolumeon a HP XP7

9 Maintaining the Cnt Ac-J Z systemSome maintenance tasks are a response to behavior discovered during system monitoring. However,you can also change

3. From the Actions menu, click Remote Replication > Edit Pair Options.NOTE: When you select multiple pairs on the Cnt Ac-J Pairs tab, Edit Pair Op

3. From the Actions menu, select Remote Replication > Force Delete Pairs (Cnt Ac-J Pairs).4. In the Force Delete Pairs (Cnt Ac-J Pairs) window, ens

Please be aware of the following when changing journal options:• Journal options must be changed on both systems, primary and secondary.• To change jo

5. Click Finish.6. In the Confirm window, review the settings and enter a task name in the Task Name box.7. Click Apply to save your settings to the s

5. For Path Watch Time Transfer, specify whether to use the same Path Watch Time value youspecified for the master journal for the restore journal. Sp

Adding additional journal volumes to an existing journalYou can add one additional journal volume to a journal. The additional volume is not used unle

Replacing a journal volume in a journalYou can replace an in-use journal volume. The smoothest method is to add a backup journal volumebefore it is ne

5. Click Finish.6. In the Confirm window, review the settings and enter a task name in the Task Name box.7. Click Apply to save your settings to the s

Forcibly deleting journals from an EXCTGYou can forcibly delete journal that could not be deleted normally from an EXCTG. Normal deletionform an EXCTG