Reducing the native rootvg that is enabled for DMP
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Reducing the native rootvg that is enabled for DMP

When a native root volume group (rootvg) is enabled for DMP, and contains multiple SAN disks, you can reduce the rootvg. Use this procedure to remove a SAN disk from a rootvg that includes multiple SAN disks.

To remove a SAN disk from a DMP-enabled rootvg

  1. Remove the SAN disk from the DMP-enabled rootvg. 

    # lsvg -p rootvg
rootvg:
PV_NAME        PV STATE       TOTAL PPs   FREE PPs    FREE DISTRIBUTION
hdisk141       active         319         46          00..00..00..00..46
hdisk131       active         319         319         64..64..63..64..64

# reducevg rootvg hdisk131

  2. Re-enable DMP root and reboot.

    # vxdmpadm native enable vgname=rootvg
Please reboot the system to enable DMP support for LVM bootability

  3. Reboot the system.

    # reboot

  4. Verify the DMP rootvg configuration.

    # vxdmpadm native list
    PATH                      DMPNODENAME              
==============================================
hdisk143                  ams_wms0_302             
hdisk142                  ams_wms0_302             
hdisk141                  ams_wms0_302             
hdisk127                  ams_wms0_302
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Extending a native rootvg that is enabled for DMP Home Upgrading Storage Foundation and AIX on a DMP-enabled rootvg