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IZ82246: UNMAP OF DS3/4/5K LUN CAUSING I/O HANG WITH AIX MPIO PCM. APPLIES TO AIX 5300-09

A fix is available

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APAR status

  • Closed as program error.

Error description

  • I/O may hang when a DS3K, DS4K, or DS5K LUN is unmapped
    with newer storage microcode levels, and running AIX default
    MPIO PCM.
    

Local fix

Problem summary

  • I/O may hang when a DS3K, DS4K, or DS5K LUN is unmapped
    with newer storage microcode levels, and running AIX default
    MPIO PCM.
    

Problem conclusion

  • Field necessary for handling LUN unmapping has shifted in
    newer microcode levels of DS3K, DS4K, or DS5K.  For newer
    microcode levels, retrieve necessary field from new offset.
    Older microcode levels, will still use previous offset.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ82246

  • Reported component name

    AIX 5.3

  • Reported component ID

    5765G0300

  • Reported release

    530

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2010-08-09

  • Closed date

    2010-08-09

  • Last modified date

    2013-03-28

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

    IZ79849

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

Fix information

  • Fixed component name

    AIX 5.3

  • Fixed component ID

    5765G0300

Applicable component levels

  • R530 PSY U837736

       UP10/09/21 I 1000

PTF to Fileset Mapping

[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11P","label":"APARs - AIX 5.3 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"530","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
28 March 2013