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IZ66897: CHDEV WITH -P FLAG CHANGES RESERVATION_POLICY ON THE DISK APPLIES TO AIX 6100-04

A fix is available

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APAR status

  • Closed as program error.

Error description

  • When the chdev command with -P flag is used to alter the
    reserve_policy only in the ODM database it also updates
    the
    value on the disk.
    
    This could cause other hosts sharing the disk to get
    reservation conflict errors.
    

Local fix

Problem summary

  • When chdev command is run with -P flag to change
    reserve_policy of a disk from PR_exclusive or PR_shared to
    single_path or no_reserve, the disk is actually opened and
    PR CLEAR command is sent (even though -P flag implies only
    Database change).  This may lead to RESERVATION CONFLICT if
    the disk is shared by another host.
    

Problem conclusion

  • chdev command modified so that PR CLEAR command is sent to
    disk only when the host has reservation on the disk or has
    registered key.
    Note: If the host has reservation or registerd key, PR CLEAR
    will be sent even with -P flag. This cannot be avoided because
    stale reservation or keys cannot be left behind.
    

Temporary fix

Comments

  • 5300-08 - use AIX APAR IZ54555
    5300-09 - use AIX APAR IZ69244
    5300-10 - use AIX APAR IZ69285
    5300-11 - use AIX APAR IZ66883
    6100-04 - use AIX APAR IZ66897
    

APAR Information

  • APAR number

    IZ66897

  • Reported component name

    AIX 610

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2009-12-16

  • Closed date

    2009-12-16

  • Last modified date

    2013-03-28

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

    IZ54555

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

Fix information

  • Fixed component name

    AIX 610

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY U830410

       UP10/01/12 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
28 March 2013