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OA66545: REMOTE SOFT FENCE COMMAND REJECT DURING HYPERSWAP

A fix is available

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APAR status

  • Closed as program error.

Error description

  • In a z/OS HyperSwap environment with Hardware Reserves enabled,
    if all paths to any swap-from LSS are lost, the attempt to
    remotely soft fence the swap-from LSS may fail with a command
    reject.
    
    KNOWN IMPACT:
    Remote Soft Fence may fail
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users at HBB77C0 and above who use z/OS                      *
    * HyperSwap with Hardware Reserves enabled                     *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Remote Soft Fence may fail during an                         *
    * Unplanned HyperSwap                                          *
    *                                                              *
    * HYPERSWP/K                                                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    In a z/OS HyperSwap environment with Hardware Reserves
    enabled, if all paths are lost to any PPRC primary LSS, then
    the remote soft fence may fail due to the wrong LSS parameter
    supplied on the command.  The remote soft fence I/O is
    intended to have the swap-to devices remotely instruct the
    swap-from devices to enter soft fence status.
    
    When this error occurs, it will surface with error:
     IOSHM0417I hh:mm:ss.tt Response from SY1, API RC = 4, Rsn = 8
    

Problem conclusion

  • z/OS HyperSwap is updated to use the correct LSS parameter on
    the remote soft fence command.
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    OA66545

  • Reported component name

    IOS

  • Reported component ID

    5752SC1C3

  • Reported release

    7C0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2024-05-20

  • Closed date

    2024-05-30

  • Last modified date

    2024-07-01

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

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

    UJ95335 UJ95340 UJ95341

Modules/Macros

  • IOSHSSUB
    

Fix information

  • Fixed component name

    IOS

  • Fixed component ID

    5752SC1C3

Applicable component levels

  • R7D0 PSY UJ95341

       UP24/06/12 P F406 ¢

  • R7E0 PSY UJ95335

       UP24/06/12 P F406 ¢

  • R7C0 PSY UJ95340

       UP24/06/12 P F406 ¢

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.

[{"Business Unit":{"code":"BU011","label":"Systems - zSystems software"},"Product":{"code":"SG19O","label":"IOS"},"Platform":[{"code":"PF054","label":"z Systems"}],"Version":"7C0"}]

Document Information

Modified date:
01 July 2024