A readme is available
APAR status
Closed as program error.
Error description
The operation to change the preferred path of a LUN can hang. Customer could experience a similar hang during LPAR migration, where that operation will try to switch the preferred paths.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * Users of MPIO storage running the 6100-05 Technology Level * with the devices.common.IBM.mpio.rte fileset at the 6.1.5.0 * or 6.1.5.1 level. **************************************************************** * PROBLEM DESCRIPTION: * An operation to change the preferred path of a LUN could hang. * A similar hang could be experienced during LPAR migration * where it will try to switch the preferred paths. **************************************************************** * RECOMMENDATION: * Install APAR IZ77189. ****************************************************************
Problem conclusion
While trying to change the preferred path, MODE SENSE goes to passive path. Even after completing the I/O, we missed marking the I/O done for the passive path causing the hang.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
IZ77189
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Submitted date
2010-06-08
Closed date
2010-06-08
Last modified date
2013-03-29
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 U834710
UP10/08/20 I 1000
PTF to Fileset Mapping
U834710 devices.common.IBM.mpio.rte 6.1.5.2
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Document Information
Modified date:
29 March 2013