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IV47351: VARIOUS I/O AND LINK ISSUES IN PUREFLEX/BLADE SYSTEMS APPLIES TO AIX 7100-02

A fix is available

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APAR status

  • Closed as program error.

Error description

  • - Linkup between the 8Gb QLogic FC adapter and the 16Gb Brocade
    Flex switch module may fail when the Brocade switch is set to
    a speed setting other than 'auto'.
    - Link bounces on the internal or external ports of the 16Gb
    Brocade AG switch may cause path failures or very long path
    failover times.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:
    * Systems running the 7100-02 Technology Level with
    * devices.pci.77102224.com below the 7.1.2.18 level.
    ****************************************************************
    * PROBLEM DESCRIPTION:
    * Customers using PureFlex or Power Blade systems with
    * Access Gateway / Transparent mode switches may see
    * any number of the following issues:
    * linkup failures, devices not configuring, long IO delays,
    * long path failover times, hangs in the fcstat application
    * during link failures, link errors, and timeouts logged in the
    * error log for the fcs devices.
    *
    * This is due to a couple issues seen with linkup and with
    * bouncing the link between the Top of Rack (TOR) and chassis
    * switches.
    *
    * Any customer using these switches should apply this fix to the
    * machines connected to the switches.  This applies to both AIX
    * and VIOS partitions.  Some of these issues are especially
    * likely when attached to a 16Gb Access Gateway switch.
    ****************************************************************
    * RECOMMENDATION:
    * Install APAR IV47351.
    * Prior to fix availability, an interim fix is available from
    * ftp://public.dhe.ibm.com/aix/ifixes/iv47351/
    ****************************************************************
    

Problem conclusion

  • - Modify linkup auto-negotiation logic to use adapter NVRAM
    hints on the best topology settings for linkup operations.
    - Modify FC protocol driver async event assumptions to avoid
    waiting too long for an adapter RESUME event that will never
    arrive.
    - Modify adapter driver to abort timers waiting for events
    after back-to-back link bounces.
    - Improve handling of FLOGI timeout when trying to enable the
    adapter firmware virtual port (VP) associated with the physical
    connection.
    - Fix race condition between sleep and wakeup of ioctl calls
    for NDD_CHBA_DATA and NDD_RNID_DATA, both associated with
    fcstat.  This may cause fcstat to hang.
    

Temporary fix

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

Comments

APAR Information

  • APAR number

    IV47351

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Submitted date

    2013-08-21

  • Closed date

    2013-08-21

  • Last modified date

    2014-02-17

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

    IV47037

  • 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 U858760

       UP14/02/14 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
17 February 2014