1gfs2_grow(8)                System Manager's Manual               gfs2_grow(8)
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NAME

6       gfs2_grow - Expand a GFS2 filesystem
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SYNOPSIS

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

14       gfs2_grow  is  used  to  expand a GFS2 filesystem after the device upon
15       which the filesystem  resides  has  also  been  expanded.   By  running
16       gfs2_grow on a GFS2 filesystem, you are requesting that any spare space
17       between the current end of the filesystem and the end of the device  is
18       filled  with  a newly initialized GFS2 filesystem extension.  When this
19       operation is complete, the resource group index for the  filesystem  is
20       updated  so  that  all  nodes  in the cluster can use the extra storage
21       space that has been added.
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23       You may only run  gfs2_grow  on  a  mounted  filesystem;  expansion  of
24       unmounted filesystems is not supported.  You only need to run gfs2_grow
25       on one node in the cluster.  All the other nodes will see the expansion
26       has occurred and automatically start to use the newly available space.
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28       You  must  be superuser to execute gfs2_grow.  The gfs2_grow tool tries
29       to prevent you from corrupting your filesystem by checking as  many  of
30       the  likely  problems as it can.  When expanding a filesystem, only the
31       last step of updating the resource index affects the currently  mounted
32       filesystem and so failure part way through the expansion process should
33       leave your filesystem in its original unexpanded state.
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35       You can run gfs2_grow with the -T flag to get a display of the  current
36       state of a mounted GFS2 filesystem.
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38       The  gfs2_grow  tool  uses the resource group (RG) size that was origi‐
39       nally calculated when mkfs.gfs2  was  done.   This  allows  tools  like
40       fsck.gfs2 to better ensure the integrity of the file system.  Since the
41       new free space often does not lie on even boundaries based on  that  RG
42       size,  there  may be some unused space on the device after gfs2_grow is
43       run.
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OPTIONS

46       -D     Print out debugging information about the filesystem layout.
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48       -h     Prints out a short usage message and exits.
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50       -q     Be quiet.  Don't print anything.
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52       -T     Test. Do all calculations, but do not write any data to the disk
53              and  do not expand the filesystem. This is used to discover what
54              the tool would have done were it run without this flag.
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56       -V     Version. Print out version information, then exit.
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BUGS

60       There is no way to shrink a GFS2 filesystem.
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SEE ALSO

64       mkfs.gfs2(8) gfs2_jadd(8)
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