IZ76096: VIOC PATHS DO NOT RECOVER AFTER REBOOTING A FAILED VIOS

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APAR status

  • Closed as fixed if next.

Error description

  • If a VIOS becomes unresponsive (VIOS appears to be hung),
    a reboot of the VIOS may be required to resolve.  A VIO
    client will mark the paths to the VIOS as failed.
    However
    after a successful reboot of the VIOS, the client does
    not
    recover the failed paths, even with health check enabled
    and the disks in an opened state.
    
    The sequence of errors in the AIX client's error log
    should show a VSCSI_ERR2, followed some time later by
    SC_DISK_ERR7, and finally VSCSI_ERR1 after the VIOS is
    back up again:
    
    VSCSI_ERR2   - Underlying transport error
                   (Error Number 002E in Detail Data)
    SC_DISK_ERR7 - path has failed
    VSCSI_ERR1   - Temporary VSCSI software error
                   (Error Number 005B in Detail Data)
    
    However, the output of the "lspath" command still shows
    the paths in a Failed state.
    
    An inspection of the current status of the adapter from
    snap data collected shows the state of the adapter is
    VSCSI_LOGGED, but SRVR_IS_HALTED flag is set, h_dropped
    count is non-zero, and ping_tmo value is high.
    

Local fix

  • Remove the affected vscsi adapter instance on the client,
    and reconfigure the adapter.
    

Problem summary

  • If a VIOS becomes unresponsive (appears to be hung), a reboot
    might be required to resolve it. Any client having VSCSI disks
    to the VIOS will mark paths a failed. But even after VIOS
    reboot, the client VSCSI paths may not recover.
    

Problem conclusion

Temporary fix

Comments

  • This APAR is being closed FIN. This means that a solution to
    this APAR is expected to be delivered from IBM in a release
    (if any) to be available within the next 24 months.
    

APAR Information

  • APAR number

    IZ76096

  • Reported component name

    AIX 5.3

  • Reported component ID

    5765G0300

  • Reported release

    530

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2010-05-17

  • Closed date

    2010-10-28

  • Last modified date

    2011-05-12

Fix information

Applicable component levels

  • R530 PSY

       UP



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Document information


More support for:

AIX family

Software version:

530

Operating system(s):

AIX

Reference #:

IZ76096

Modified date:

2011-05-12

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