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VM66433: FLASHCOPY PRESERVE MIRROR AND GLOBAL MIRROR SUPPORT

A fix is available

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APAR status

  • Closed as new function.

Error description

  • This new functionality exploits Flashcopy's preserve mirror
    capability to avoid potential PPRC suspend conditions.
    Flashcopy operations where the source and target devices are
    both PPRC primaries often result in the target device hitting a
    PPRC suspend condition while the data transfers over to the PPRC
    secondary.  Support is also added to allow Flashcopy to Global
    Mirror primary devices.
    

Local fix

  • Before this support, customers would have to exploit Flashcopy
    commands via z/OS or ICKDSF to avoid the PPRC suspend
    conditions.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Users of the z/VM FlashCopy Command          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    z/VM's Flashcopy commands do not currently exploit the
    hardware's ability to preserve the mirroring state of the target
    device while the Flashcopy operation completes.  Flashcopy
    to Global Mirror primary devices is also not supported.
    

Problem conclusion

Temporary fix

  • FOR RELEASE VM/ESACP/ESAR710 :
    PREREQ: VM66242 VM66112 VM66343
    CO-REQ: NONE
    IF-REQ: NONE
    FOR RELEASE VM/ESA CP/ESA R720 :
    PREREQ: NONE
    CO-REQ: NONE
    IF-REQ: NONE
    

Comments

  • Support is being added to allow z/VM's FLASHCOPY ESTABLISH and
    FLASHCOPY vdev commands to include Preserve Mirror capability.
    This allows a Flashcopy between two PPRC/Metro Mirror primary
    devices to complete without affecting the PPRC state of the
    target devices.
    
    Flashcopy was also updated to support using Global Mirror
    devices as the target of a Flashcopy relationship.
    
    THE FOLLOWING CHANGES HAVE BEEN MADE TO THE SYSTEM REFERENCE
    LIBRARIES:
    ***START PUBLICATION CHANGE*************************************
    PUBLICATION TITLE: CP Commands and Utilities Reference
    
              RELEASE: 7.2
    
    ORDER NUMBER: SC24-6268-06
    
    -------------------------------------------
    CHAPTER: 2. CP Commands
    PAGE: 462
    ABSTRACT:
    Addition of Preserve Mirror related
    operands to Flashcopy vdev
    BODY:
    Addition of PRESERVemirror and
    NOPRESERVemirror operands and their related
    usage notes.
    
    Addition of the following new messages
    issued by Flashcopy commands:
    
    HCP2471E At least one of the specified
    devices does not support PRESERVEMIRROR.
    Retry the command specifying
    NOPRESERVEMIRROR.
    
    HCP3201E DASD Error: Command Reject
    Message F: Status not as required
    Reason 89: Establish FlashCopy specified a
    preserve mirror operation.  A condition
    prevents the preserve mirror operation from
    being successful. Reason Code Qualifier: rq
    
    -------------------------------------------
    CHAPTER: 2. CP Commands
    PAGE: 474
    ABSTRACT:
    Addition of Preserve Mirror related
    operands to Flashcopy ESTABLISH
    BODY:
    Addition of PRESERVemirror and
    NOPRESERVemirror operands and their related
    usage notes.  New usage notes (identical in
    content also included in FLASHCOPY vdev):
    
    18. If PRESERVemirror and NOPRESERVemirror
        are not specified, the Flashcopy
        operation is attempted first as a
        PRESERVemirror request.  If the first
        attempt fails, the I/O is retried one
        time as a NOPRESERVemirror request.
    
    19. FLASHCOPY to Global Mirror
        (asynchronous PPRC) primary devices is
        supported.
    
    ***END PUBLICATION CHANGE***************************************
    
    ***START PUBLICATION CHANGE*************************************
    PUBLICATION TITLE: CP Messages and Codes
    
              RELEASE: 7.2
    
    ORDER NUMBER: GC24-6270-05
    
    -------------------------------------------
    CHAPTER: 3. System Messages
    PAGE: 539
    ABSTRACT:
    Addition of new message HCP2471E
    BODY:
    HCP2471E At least one of the specified
    devices does not support PRESERVEMIRROR.
    Retry the command specifying
    NOPRESERVEMIRROR.
    
    Explanation
    
    A FlashCopy command was specified with the
    PRESERVemirror operand, but one of the
    specified devices does not support the
    PRESERVemirror feature.
    
    System action
    
    The FlashCopy command does not run. System
    operation continues.
    
    User response
    
    Issue the FlashCopy command again and
    specify the NOPRESERVemirror option.
    -------------------------------------------
    CHAPTER: 3. System Messages
    PAGE: 646
    ABSTRACT:
    Addition of new version of existing message
    HCP3201E
    BODY:
    -DASD Error: Command Reject
    Message F: Status not as required
    Reason 89: Establish Flashcopy specified a
    preserve mirror operation.  A condition
    prevents the preserve mirror operation from
    being successful.  Reason Code Qualifier:
    rq
    
    ***END PUBLICATION CHANGE***************************************
    ×**** PE20/11/13 FIX IN ERROR. SEE APAR VM66477  FOR DESCRIPTION
    

APAR Information

  • APAR number

    VM66433

  • Reported component name

    VM CP

  • Reported component ID

    568411202

  • Reported release

    710

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2020-08-11

  • Closed date

    2020-10-13

  • Last modified date

    2021-06-29

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UM35762 UM35763

Modules/Macros

  • ESTABLIS HCPMES   HCPMESA  HCPMESB  HCPMXRBK HCPNFC   HCPPFC
    HCPSDU   HCP2471E HCP3201E VDEV
    

Publications Referenced
SC24626806GC24627005   

Fix information

  • Fixed component name

    VM CP

  • Fixed component ID

    568411202

Applicable component levels

  • R710 PSY UM35762

       UP20/10/15 P 2101

  • R720 PSY UM35780

       UP20/12/03 P 2101

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
30 June 2021