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IV66881: HYPERWAP QUIESCE OPERATION TIMES OUT APPLIES TO AIX 7100-03

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When using PowerHA to control Hyperswap DS8k LUNs, there is
    a small chance that in certain error scenarios, PowerHA will
    not swap LUNs when it should.  This occurs when the primary
    LUN is suffering from command timeouts.  PowerHA will attempt
    to quiesce the group before it swaps the group.  But if the
    quiesce lines up with the command timeout, the quiesce may
    fail which will prevent the group from being swapped.
    
    In this instance, PowerHA will log an error indicating that
    its attempt to quiesce the group failed with errno 78.
    

Local fix

Problem summary

  • When using PowerHA to control Hyperswap DS8k LUNs, there is
    a small chance that in certain error scenarios, PowerHA will
    not swap LUNs when it should.  This occurs when the primary
    LUN is suffering from command timeouts.  PowerHA will attempt
    to quiesce the group before it swaps the group.  But if the
    quiesce lines up with the command timeout, the quiesce may
    fail which will prevent the group from being swapped.
    
    In this instance, PowerHA will log an error indicating that
    its attempt to quiesce the group failed with errno 78.
    

Problem conclusion

  • Modified the timeout value use for the quiesce operation to
    ensure it is greater than the timeout for the SCSI command.
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV70100
    6100-09 - use AIX APAR IV66733
    7100-02 - use AIX APAR IV70412
    7100-03 - use AIX APAR IV66881
    

APAR Information

  • APAR number

    IV66881

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-11-12

  • Closed date

    2014-11-12

  • Last modified date

    2015-09-30

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

    IV66733

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

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U865818

       UP15/05/19 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV66881

Modified date: 30 September 2015