This following example procedure illustrates a migration from PowerPath to DMP on the Virtual I/O server, in a configuration with two VIO Servers.
Example configuration values:
Managed System: dmpviosp6 VIO server1: dmpvios1 VIO server2: dmpvios2 VIO clients: dmpvioc1 SAN LUNs: EMC Clariion array Current multi-pathing solution on VIO server: EMC PowerPath
To migrate dmpviosp6 from PowerPath to DMP
See the IBM website for information about backing up Virtual I/O server.
dmpvioc1$ halt
$ oem_setup_env
dmpvios1$ /usr/ios/cli/ioscli lsmap -all
SVSA Physloc Client Partition ID -------------- ---------------------------- -------------------- vhost0 U9117.MMA.0686502-V2-C11 0x00000004 VTD P0 Status Available LUN 0x8100000000000000 Backing device hdiskpower0 Physloc U789D.001.DQD04AF-P1-C5-T1-W500507630813861A-L4 0034037 00000000 VTD P1 Status Available LUN 0x8200000000000000 Backing device hdiskpower1 Physloc U789D.001.DQD04AF-P1-C5-T1-W500507630813861A-L40 0240C10 0000000 VTD P2 Status Available LUN 0x8300000000000000 Backing device hdiskpower2 Physloc U789D.001.DQD04AF-P1-C5-T1-W500507630813861A-L40 02409A00000000
dmpvios1$ rmdev -p vhost0 P0 Defined P1 Defined P2 Defined
Repeat this step for all other virtual adapters.
Unmount the file system and varyoff volume groups residing on the PowerPath devices.
Display the volume groups (vgs) in the configuration:
dmpvios1$ lsvg rootvg brunovg
dmpvios1$ lsvg -p brunovg
brunovg: PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION hdiskpower3 active 511 501 103..92..102..102..102
Use the varyoffvg command on all affected vgs:
dmpvios1$ varyoffvg brunovg
Unmanage the EMC Clariion array from PowerPath control
# powermt unmanage class=clariion hdiskpower0 deleted hdiskpower1 deleted hdiskpower2 deleted hdiskpower3 deleted
dmpvios1$ reboot
dmpvios1$ lsvg -p brunovg
brunovg: PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION emc_clari0_138 active 511 501 103..92..102..102..102
Verify the mappings of the LUNs on the migrated volume groups:
dmpvios1$ lsmap -all
SVSA Physloc Client Partition ID -------------- -------------------------- ------------------ vhost0 U9117.MMA.0686502-V2-C11 0x00000000 VTD P0 Status Available LUN 0x8100000000000000 Backing device emc_clari0_130 Physloc VTD P1 Status Available LUN 0x8200000000000000 Backing device emc_clari0_136 Physloc VTD P2 Status Available LUN 0x8300000000000000 Backing device emc_clari0_137 Physloc