To configure DMP support for booting over a SAN

1. The PVID and volume group entries in the second and third columns should be identical for all the paths. Use the lspv command for the root volume group to verify that the PVID and volume group entries are set correctly.

   In this example, the LVM root disk is multipathed with 4 paths. The output from the lspv command for the root volume group (rootvg) is as follows:

   # lspv | grep rootvg
   hdisk374 00cbf5ce56def54d rootvg active
   hdisk375 00cbf5ce56def54d rootvg
   hdisk376 00cbf5ce56def54d rootvg
   hdisk377 00cbf5ce56def54d rootvg

2. If the PVID and volume group entries are not set correctly on any of the paths, use the chdev command to set the correct value.

   For example, the following output shows that the hdisk377 path is not set correctly:

   # lspv | grep rootvg
   hdisk374 00cbf5ce56def54d rootvg active
   hdisk375 00cbf5ce56def54d rootvg
   hdisk376 00cbf5ce56def54d rootvg
   hdisk377 none             None

   To correct the setting for the path, use the following command:

   # chdev -l hdisk377 -a pv=yes
   hdisk377 changed

   The output of the lspv command now shows the correct values:

   # lspv | grep rootvg
   hdisk374 00cbf5ce56def54d rootvg active
   hdisk375 00cbf5ce56def54d rootvg
   hdisk376 00cbf5ce56def54d rootvg
   hdisk377 00cbf5ce56def54d rootvg

3. Check that the output from the bootlist command is correct:

   # bootlist -m normal -o
   hdisk374 blv=hd5
   hdisk375 blv=hd5
   hdisk376 blv=hd5
   hdisk377 blv=hd5

   In this example, the output should show the default boot volume, hd5, for each path.

4. If the blv option is not set for a path to the disk, use the bootlist command to set it:

   # bootlist -m normal hdisk374 hdisk375 hdisk376 hdisk377 blv=hd5

5. Run the following command to configure DMP on the root disk:

   # vxdmpadm native enable vgname=rootvg

6. Reboot the system. DMP takes control of the SAN boot device to perform load balancing and failover.

7. Verify whether DMP controls the root disk.

   # vxdmpadm native list vgname=rootvg