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       gfs2_grow - Expand a GFS2 filesystem


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


       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.

       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


       -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.


       There is no way to shrink a GFS2 filesystem.


       mkfs.gfs2(8) gfs2_jadd(8)