You can suspend write activity to a file system by using the gfs_tool freeze command. Suspending write activity allows hardware-based device snapshots to be used to capture the file system in a consistent state. The gfs_tool unfreeze command ends the suspension.
gfs_tool freeze MountPoint
gfs_tool unfreeze MountPoint
Specifies the file system.
This example suspends writes to file system /gfs.
gfs_tool freeze /gfs
This example ends suspension of writes to file system /gfs.
gfs_tool unfreeze /gfs