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Before rebooting and starting the migration, do not forget to remove SDDPCM multipathing driver

• Unmount filesystems, varyoff volume groups and delete all disks non-rootvg
• For rootvg, first stop the process pcmsrv

[root@nim]/root# lsdev -Cc disk
hdisk0 Available C5-T1-01 MPIO FC 2145
[root@nim]/root# df
Filesystem    512-blocks      Free %Used    Iused %Iused Mounted on
/dev/hd4         1441792    569144   61%    18908    18% /
/dev/hd2         8355840   1159912   87%    50547    23% /usr
/dev/hd9var      1212416    865760   29%     4183     4% /var
/dev/hd3        10616832   6088520   43%      444     1% /tmp
/dev/hd1        22052864  22028080    1%       13     1% /home
/dev/hd10opt     4620288   3631392   22%     7091     2% /opt
/dev/rootlv      1376256    853576   38%      154     1% /root

[root@nim]/root# lssrc -s pcmsrv
Subsystem         Group            PID          Status
 pcmsrv                            4063354      active
[root@nim]/root# stopsrc -s pcmsrv
0513-044 The pcmsrv Subsystem was requested to stop.
[root@nim]/root# lssrc -s pcmsrv
Subsystem         Group            PID          Status
 pcmsrv                                         inoperative
[root@nim]/root# ps -ef | grep pcmsrv

• Change into ODM the rootvg's disk definition

[root@nim]/root# odmget -q "PdDvLn like disk/fcp/2145*" CuDv

CuDv:
        name = "hdisk0"
        status = 1
        chgstatus = 2
        ddins = "scsidisk"
        location = "C5-T1-01"
        parent = "fscsi0"
        connwhere = "W_0"
        PdDvLn = "disk/fcp/2145"

[root@nim]/root# odmget -q "PdDvLn like disk/fcp/2145*" CuDv | sed "s/\"disk\/fcp\/2145.*\"/\"disk\/fcp\/mpioosdisk\"/">./2145cudv.out
[root@nim]/root# cat 2145cudv.out

CuDv:
        name = "hdisk0"
        status = 1
        chgstatus = 2
        ddins = "scsidisk"
        location = "C5-T1-01"
        parent = "fscsi0"
        connwhere = "W_0"
        PdDvLn = "disk/fcp/mpioosdisk"
[root@nim]/root# odmdelete -q "PdDvLn like disk/fcp/2145*" -o CuDv
0518-307 odmdelete: 1 objects deleted.
[root@nim]/root# odmadd ./2145cudv.out
[root@nim]/root# odmget -q "PdDvLn like disk/fcp/mpioosdisk" CuDv

CuDv:
        name = "hdisk0"
        status = 1
        chgstatus = 2
        ddins = "scsidisk"
        location = "C5-T1-01"
        parent = "fscsi0"
        connwhere = "W_0"
        PdDvLn = "disk/fcp/mpioosdisk"

• Uninstall SDDPCM package

[root@nim]/tmp/mpio# lslpp -Lc | grep sdd
devices.sddpcm.71:devices.sddpcm.71.rte:2.7.0.0: : :C: :IBM SDD PCM for AIX V71: : : : : : :0:0:/:
[root@nim]/tmp/mpio# installp -u devices.sddpcm.71.rte

• Now reboot for migration