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xfs_growfs(8)                        System Manager's Manual                        xfs_growfs(8)

NAME
       xfs_growfs, xfs_info - expand an XFS filesystem

SYNOPSIS
       xfs_growfs  [ -dilnrx ] [ -D size ] [ -e rtextsize ] [ -L size ] [ -m maxpct ] [ -t mtab ]
       [ -R size ] mount-point
       xfs_growfs -V

       xfs_info [ -t mtab ] mount-point
       xfs_info -V

DESCRIPTION
       xfs_growfs expands an existing XFS filesystem (see xfs(5)).  The mount-point  argument  is
       the  pathname  of  the  directory  where the filesystem is mounted. The filesystem must be
       mounted to be grown (see mount(8)).  The existing contents of the  filesystem  are  undis‐
       turbed, and the added space becomes available for additional file storage.

       xfs_info is equivalent to invoking xfs_growfs with the -n option (see discussion below).

OPTIONS
       -d | -D size
              Specifies  that  the data section of the filesystem should be grown. If the -D size
              option is given, the data section is grown to that size, otherwise the data section
              is  grown to the largest size possible with the -d option. The size is expressed in
              filesystem blocks.

       -e     Allows the real-time extent size to be specified. In mkfs.xfs(8) this is  specified
              with -r extsize=nnnn.

       -i     The  new  log  is an internal log (inside the data section).  [NOTE: This option is
              not implemented]

       -l | -L size
              Specifies that the log section of the filesystem should be grown, shrunk, or moved.
              If the -L size option is given, the log section is changed to be that size, if pos‐
              sible. The size is expressed in filesystem blocks.  The size  of  an  internal  log
              must  be  smaller  than  the  size of an allocation group (this value is printed at
              mkfs(8) time). If neither -i nor -x is given with  -l,  the  log  continues  to  be
              internal or external as it was before.  [NOTE: These options are not implemented]

       -m     Specify  a new value for the maximum percentage of space in the filesystem that can
              be allocated as inodes. In mkfs.xfs(8) this is specified with -i maxpct=nn.

       -n     Specifies that no change to the filesystem is to be made.  The filesystem  geometry
              is  printed,  and argument checking is performed, but no growth occurs.  See output
              examples below.

       -r | -R size
              Specifies that the real-time section of the filesystem should be grown. If  the  -R
              size  option  is  given, the real-time section is grown to that size, otherwise the
              real-time section is grown to the largest size possible with  the  -r  option.  The
              size  is expressed in filesystem blocks.  The filesystem does not need to have con‐
              tained a real-time section before the xfs_growfs operation.

       -t     Specifies an alternate mount table file (default is /proc/mounts if it exists, else
              /etc/mtab).   This is used when working with filesystems mounted without writing to
              /etc/mtab file - refer to mount(8) for further details.

       -V     Prints the version number and exits. The mount-point argument is not required  with
              -V.

       xfs_growfs is most often used in conjunction with logical volumes (see md(4) and lvm(8) on
       Linux).  However, it can also be used on a regular disk partition, for example if a parti‐
       tion has been enlarged while retaining the same starting block.

PRACTICAL USE
       Filesystems  normally occupy all of the space on the device where they reside. In order to
       grow a filesystem, it is necessary to provide added space  for  it  to  occupy.  Therefore
       there  must  be at least one spare new disk partition available. Adding the space is often
       done through the use of a logical volume manager.

EXAMPLES
       Understanding xfs_info output.

       Suppose one has the following "xfs_info /dev/sda" output:

         meta-data=/dev/sda      isize=256    agcount=32, agsize=16777184 blks
                  =              sectsz=512   attr=2
         data     =              bsize=4096   blocks=536869888, imaxpct=5
                  =              sunit=32     swidth=128 blks
         naming   =version 2     bsize=4096
         log      =internal      bsize=4096   blocks=32768, version=2
                  =              sectsz=512   sunit=32 blks, lazy-count=1
         realtime =none          extsz=524288 blocks=0, rtextents=0

       Here, the data section of the output indicates "bsize=4096", meaning the data  block  size
       for  this  filesystem  is 4096 bytes.  This section also shows "sunit=32 swidth=128 blks",
       which means the stripe unit is 32*4096 bytes = 128  kibibytes  and  the  stripe  width  is
       128*4096  bytes = 512 kibibytes.  A single stripe of this filesystem therefore consists of
       four stripe units (128 blocks / 32 blocks per unit).

SEE ALSO
       mkfs.xfs(8), md(4), lvm(8), mount(8).

                                                                                    xfs_growfs(8)

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