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       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


       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 undisturbed, 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).


       -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 possible. 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 per-
              formed, but no growth occurs.  See output examples below.

       -r | -R size
              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  partition  has  been  enlarged  while
       retaining the same starting block.


       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.


       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).


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

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