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
APAR Information
APAR number
IZ71874
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2010-03-02
Closed date
2010-03-02
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 610 STD EDI
Fixed component ID
5765G6200
Applicable component levels
R610 PSY U831322
UP10/04/26 I 1000
PTF to Fileset Mapping
U831322 devices.common.IBM.disk.rte 6.1.1.1
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Document Information
Modified date:
28 March 2013