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