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IZ85500: AIX 61: I/O HANG DUE TO OVERSUBSCRIBED LUN APPLIES TO AIX 7100-00

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

  • Using MPIO, when a thinly provisioned Clariion LUN
    reaches
    its provisioned limit, any further write commands fail
    with
    a CHECK CONDITION with sense_key/asc/ascq of 07/27/07
    (DATA PROTECT, SPACE ALLOCATION FAILED WRITE PROTECT).
    Paths to the LUN are available, but I/O hangs.
    

Local fix

Problem summary

  • When an oversubscribed Thin Provisioned LUN is written beyond
    the actual allocated limit, the IO might hang. The IO will
    keep alternating among available paths but will never complete.
    

Problem conclusion

  • Disk driver modified to handle error conditions properly when
    a Thin LUN is oversubscribed.
    

Temporary fix

Comments

  • 5300-10 - use AIX APAR IZ91223
    5300-11 - use AIX APAR IZ83530
    5300-12 - use AIX APAR IZ90682
    6100-03 - use AIX APAR IZ83537
    6100-04 - use AIX APAR IZ83546
    6100-05 - use AIX APAR IZ84668
    6100-06 - use AIX APAR IZ76086
    6100-06 - use AIX APAR IZ85134
    7100-00 - use AIX APAR IZ85500
    

APAR Information

  • APAR number

    IZ85500

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2010-09-23

  • Closed date

    2010-09-23

  • Last modified date

    2013-04-16

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

    IZ76086

  • 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 U833161

       UP11/05/11 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
16 April 2013