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Description: Common question working with GFS2 - particularly when we get repairing a GFS2 File System where it is important that all nodes umount the FS...

How do I determine who has GFS2 mounted?

A starting point is
gfs_control ls -n

Is there a better way? Can this command and its other uses be added to the SG content? Is there a way to remotely (central management) force umount?

Related, in labs we often get some node that is hung with GFS2 (or clvm). here also, troubleshooting information on ejecting that node would be useful. The most consistent way I fix things in the classroom is to shutoff all nodes and then start all nodes. There should be a better production way to recover.