A fix is available
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
IZ69244
Reported component name
AIX 5.3
Reported component ID
5765G0300
Reported release
530
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2010-02-02
Closed date
2010-02-02
Last modified date
2013-03-28
APAR is sysrouted FROM one or more of the following:
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 U829452
UP10/03/23 I 1000
PTF to Fileset Mapping
U829452 devices.common.IBM.disk.rte 5.3.9.2
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Document Information
Modified date:
28 March 2013