Error description

LPAR Migration operation will hang. 

Local fix

There is no work around.

Problem summary

****************************************************************
* USERS AFFECTED:
* VIOS running MPIO on DS3,4 and 5K storage. 
*  Affected fileset: devices.common.IBM.mpio.rte 5.3.12.1
****************************************************************
* PROBLEM DESCRIPTION:
* When the LPAR migration is initiated the preferred path changes. This causes
* the MPIO code to query the hardware in order to determine the preferred owner.
* The queries return but the code loses track of the return data. As a result it
* thinks that the query has not returned and it hangs waiting for the data.
****************************************************************
* RECOMMENDATION:
* Install APAR IZ77907.
* emgr -e IZ77907_1.100623.epkg.Z
* reboot is required
****************************************************************

Problem conclusion

When the queries return use the existing MPIO flags to properly identify the 
preferred and non-preferred controllers.

Comments
5300-09 - use AIX APAR IZ77897
5300-10 - use AIX APAR IZ77901
5300-11 - use AIX APAR IZ77906
5300-12 - use AIX APAR IZ77907
6100-02 - use AIX APAR IZ77908
6100-03 - use AIX APAR IZ77366
6100-04 - use AIX APAR IZ76820
6100-05 - use AIX APAR IZ77189