Thursday, September 6, 2012

IBM AIX - Removing AIX EMC ODM Definitions

Removing AIX EMC ODM Definitions

  1. Before making any changes, collect host logs to document the current configuration. At a minimum, save the following: inq, lsdev -Cc disk, lsdev -Cc adapter, lspv, and lsvg
  2. Shutdown the application(s), unmount the file system(s), and varyoff all volume groups except for rootvg. Do not export the volume groups.
    # varyoffvg <vg_name>
    Check with lsvg -o (confirm that only rootvg is varied on)
    If no PowerPath, skip all steps with power names.
  3. For CLARiiON configuration, if Navisphere Agent is running, stop it:
    # /etc/rc.agent stop
  4. Remove paths from Powerpath configuration:
    # powermt remove hba=all
  5. Delete all hdiskpower devices:
    # lsdev -Cc disk -Fname | grep power | xargs -n1 rmdev -dl
  6. Remove the PowerPath driver instance:
    # rmdev -dl powerpath0
  7. Delete all hdisk devices:
    For Symmetrix devices, use this command:

    # lsdev -CtSYMM* -Fname | xargs -n1 rmdev -dl
    For CLARiiON devices, use this command:
    # lsdev -CtCLAR* -Fname | xargs -n1 rmdev -dl
  8. Confirm with lsdev -Cc disk that there are no EMC hdisks or hdiskpowers.
  9. Remove all Fiber driver instances:
    # rmdev -Rdl fscsiX
    (X being driver instance number, i.e. 0,1,2, etc.)
  10. Verify through lsdev -Cc driver that there are no more fiber driver instances (fscsi).
  11. Change the adapter instances in Defined state
    # rmdev -l fcsX
    (X being adapter instance number, i.e. 0,1,2, etc.)
  12. Create the hdisk entries for all EMC devices:
    # emc_cfgmgr
    or
    # cfgmgr -vl fcsx
    (x being each adapter instance which was rebuilt). Skip this part if no PowerPath.
  13. Configure all EMC devices into PowerPath:
    # powermt config
  14. Check the system to see if it now displays correctly:
    # powermt display
    # powermt display dev=all
    # lsdev -Cc disk
    # /etc/rc.agent start

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