NAME

       gfs2_grow - Expand a GFS2 filesystem

SYNOPSIS

       gfs2_grow [OPTION]... <DEVICE|MOUNTPOINT>...

DESCRIPTION

       gfs2_grow is used to expand a GFS2 filesystem after the device upon which the filesystem resides has also
       been  expanded.   By  running  gfs2_grow  on  a  GFS2 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
       GFS2  filesystem extension.  When this operation is complete, the resource group index for the filesystem
       is updated so that all nodes in the cluster can use the extra storage space that has been added.

       See lvmlockd(8) for the procedure to extend and refresh the logical volume prior to running gfs2_grow.

       You may only run gfs2_grow on a mounted filesystem; expansion of unmounted filesystems is not  supported.
       You  only  need  to run gfs2_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 gfs2_grow.  The gfs2_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  gfs2_grow  with  the  -T  flag  to  get  a  display of the current state of a mounted GFS2
       filesystem.

       The gfs2_grow tool uses the resource group (RG) size that was originally calculated  when  mkfs.gfs2  was
       done.  This allows tools like fsck.gfs2 to better ensure the integrity of the file system.  Since the new
       free space often does not lie on even boundaries based on that RG size, there may be some unused space on
       the device after gfs2_grow is run.

OPTIONS

       -D     Print out debugging information about the filesystem layout.

       -h     Prints out a short usage message and exits.

       -q     Be quiet.  Don't print anything.

       -T     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.

       -V     Version. Print out version information, then exit.

BUGS

       There is no way to shrink a GFS2 filesystem.

SEE ALSO

       mkfs.gfs2(8) gfs2_jadd(8) lvextend(8) lvmlockd(8)

                                                                                                    gfs2_grow(8)