gfs_grow is used to expand a GFS filesystem after the device
upon which the filesystem resides has also been expanded. By
running gfs_grow on a GFS filesystem, you are requesting that
any spare space between the current end of the filesystem and
the end of the device is filled with a newly initialized GFS
filesystem extension. When this operation is complete, the resource
index for the filesystem is updated so that all nodes in the
cluster can use the extra storage space which has been added.
You may only run gfs_grow on a mounted filesystem; expansion of
unmounted filesystems is not supported. You only need to
run gfs_grow on one node in the cluster. All the other nodes will
see the expansion has occurred and automatically start to use the
newly available space.
You must be superuser to execute gfs_grow. The gfs_grow
tool tries to prevent you from corrupting your filesystem by checking as
many of the likely problems as it can. When expanding a filesystem,
only the last step of updating the resource index affects the currently
mounted filesystem and so failure part way through the expansion process
should leave your filesystem in its original unexpanded state.
You can run gfs_grow with the -Tv flags to get a display
of the current state of a mounted GFS filesystem. This can be useful
to do after the expansion process to see if the changes have been
gfs_grow will consume all the remaining space in a device and add
it to the filesystem. If you want to add journals too, you need to add
the journals first using gfs_jadd.
Prints out a short usage message and exits.
Quiet. Turns down the verbosity level.
Test. Do all calculations, but do not write any data to the disk and do
not expand the filesystem. This is used to discover what the tool would
have done were it run without this flag. You probably want to turn the
verbosity level up in order to gain most information from this option.
Version. Print out version information, then exit.