IV70412: HYPERWAP QUIESCE OPERATION TIMES OUT APPLIES TO AIX 7100-02

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When using PowerHA to control Hyperswap DS8k LUNs, there is
  a small chance that in certain error scenarios, PowerHA will
  not swap LUNs when it should.  This occurs when the primary
  LUN is suffering from command timeouts.  PowerHA will attempt
  to quiesce the group before it swaps the group.  But if the
  quiesce lines up with the command timeout, the quiesce may
  fail which will prevent the group from being swapped.
  
  In this instance, PowerHA will log an error indicating that
  its attempt to quiesce the group failed with errno 78.
  

Local fix

Problem summary

• When using PowerHA to control Hyperswap DS8k LUNs, there is
  a small chance that in certain error scenarios, PowerHA will
  not swap LUNs when it should.  This occurs when the primary
  LUN is suffering from command timeouts.  PowerHA will attempt
  to quiesce the group before it swaps the group.  But if the
  quiesce lines up with the command timeout, the quiesce may
  fail which will prevent the group from being swapped.
  
  In this instance, PowerHA will log an error indicating that
  its attempt to quiesce the group failed with errno 78.
  

Problem conclusion

• Modified the timeout value use for the quiesce operation to
  ensure it is greater than the timeout for the SCSI command.
  

Temporary fix

Comments

• 6100-08 - use AIX APAR IV70100
  6100-09 - use AIX APAR IV66733
  7100-02 - use AIX APAR IV70412
  7100-03 - use AIX APAR IV66881
  

APAR Information

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

  IV66733

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

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U864303

     UP15/09/21 I 1000

PTF to Fileset Mapping

• U864303 devices.common.IBM.mpio.rte 7.1.2.21