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I've had my GPFS setup for a number of years. I'm currently migrating off older IBM San disks to a new setup. I have migrated all my GPFS disks that are part of my GPFS filesystem. Now I have 3 tiebreaker disks I need to migrate off of as well. Is there a way to do this, without taking GPFS down and using mmchconfig to remove tiebreaker, and then mmchconfig to add tiebreaker back with the new disks? I have hundreds of servers that mount this filesystem, so if there is an easier way that would be great!
If your using the cluster configuration repository (CCR) the use of tiebreaker disks can be enabled or disabled at any time by issuing an mmchconfig tiebreakerDisks command. The change will take effect immediately, and it is not necessary to shut down GPFS when making this change.
if your using server based repository I don't think we can do it while gpfs is active.
you can verify what repository your using with mmlscluster command.
Tiebreaker disks must be connected to all quorum nodes. In a CCR-based cluster, when adding tiebreaker disks: GPFS should be up and running if tiebreaker disks are part of the file system. GPFS can be either running or shut down if tiebreaker disks are not a part of the file system.