InfoScale™ 9.0 Dynamic Multi-Pathing Administrator's Guide - AIX

To remove a SAN disk from a DMP-enabled rootvg

1. View the rootvg configuration. If the configuration contains multiple SAN disks, you can remove one.

   # lsvg -p rootvg
   PV_NAME      PV STATE    TOTAL PPs  FREE PPs  FREE DISTRIBUTION
   hdisk1       active      73         8         00..00..00..00..08
   hdisk21      active      15         15        03..03..03..03..03

   # lspv | grep -w rootvg
   hdisk1        00c398edf9fae077     rootvg     active
   hdisk21       00c398ed00008e79     rootvg     active
   hdisk22       00c398ed00008e79     rootvg     active
   hdisk24       00c398edf9fae077     rootvg     active

2. Run the following comand to acquire the PVIDs from the operating system:

   # vxdmpadm native acquire

3. The lspv output now displays the DMP node names, instead of the device paths:

   # lspv | grep -w rootvg
   emc0_0039      00c398ed00008e79     rootvg     active
   emc0_00a7      00c398edf9fae077     rootvg     active

4. Remove the SAN disk from the DMP-enabled rootvg. If the physical volume has allocated partitions, you must move or delete the partitions before you remove the SAN disk.

   # reducevg rootvg emc0_00a7

5. Verify that the DMP device is removed from the DMP rootvg configuration. For example:

   # lsvg -p rootvg
   PV_NAME      PV STATE    TOTAL PPs  FREE PPs  FREE DISTRIBUTION
   emc0_0039    active      73         8         00..00..00..00..08

   # lspv | grep -w rootvg
   emc0_0039     00c398ed00008e79     rootvg     active

6. Run the following comand to release the PVIDs to the operating system:

   # vxdmpadm native release

7. The lspv output now displays the device paths:

   # lspv | grep -w rootvg
   hdisk22      00c398ed00008e79     rootvg     active
   hdisk21      00c398ed00008e79     rootvg     active