Contact nodes down or GPFS down on contact nodes

There are error messages that gets displayed if the contact nodes are down or the GPFS is down on the contact nodes, and the courses of action you can take to correct the problem.

A mount command fails with a message similar to this:

GPFS: 6027-510 Cannot mount /dev/gpfs22 on /gpfs22: A remote host did not respond
    within the timeout period.

The GPFS log has entries similar to this:

Mon Jun 25 13:11:14 2007: Command: mount gpfslx22:gpfs22 19004
Mon Jun 25 13:11:14 2007: Waiting to join remote cluster gpfslx22
Mon Jun 25 13:11:15 2007: Connecting to 199.13.68.4 gpfslx22
Mon Jun 25 13:16:36 2007: Failed to join remote cluster gpfslx22
Mon Jun 25 13:16:36 2007: Command err 78: mount gpfslx22:gpfs22 19004

To resolve the problem, use the mmremotecluster show command and verify that the cluster name matches the remote cluster and the contact nodes are valid nodes in the remote cluster. Verify that GPFS is active on the contact nodes in the remote cluster. Another way to resolve this problem is to change the contact nodes using the mmremotecluster update command.