Check the volume group on each node

All the disks in GPFS cluster must be properly defined to all the nodes.

Make sure that all disks are properly defined to all nodes in the GPFS cluster:

  1. Issue the AIX® lspv command on all nodes in the GPFS cluster and save the output.
  2. Compare the pvid and volume group fields for all GPFS volume groups.

    Each volume group must have the same pvid and volume group name on each node. The hdisk name for these disks may vary.

For example, to verify the volume group gpfs1vg on the five nodes in the GPFS cluster, for each node in the cluster issue: 
lspv | grep gpfs1vg
The system displays information similar to: 
k145n01:  hdisk3         00001351566acb07    gpfs1vg    active
k145n02:  hdisk3         00001351566acb07    gpfs1vg    active
k145n03:  hdisk5         00001351566acb07    gpfs1vg    active
k145n04:  hdisk5         00001351566acb07    gpfs1vg    active
k145n05:  hdisk7         00001351566acb07    gpfs1vg    active

Here the output shows that on each of the five nodes the volume group gpfs1vg is the same physical disk (has the same pvid). The hdisk numbers vary, but the fact that they may be called different hdisk names on different nodes has been accounted for in the GPFS product. This is an example of a properly defined volume group.

If any of the pvids were different for the same volume group, this would indicate that the same volume group name has been used when creating volume groups on different physical volumes. This will not work for GPFS. A volume group name can be used only for the same physical volume shared among nodes in a cluster. For more information, refer to AIX in IBM® Documentation and search for operating system and device management.