NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | COLOPHON


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

NAME         top

       xfs_info - display XFS filesystem geometry information

SYNOPSIS         top

       xfs_info [ -t mtab ] [ mount-point | block-device | file-image ]
       xfs_info -V

DESCRIPTION         top

       xfs_info displays geometry information about an existing XFS
       filesystem.  The mount-point argument is the pathname of a directory
       where the filesystem is mounted.  The block-device or file-image
       contain a raw XFS filesystem.  The existing contents of the
       filesystem are undisturbed.

OPTIONS         top

       -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.  This option has
              no effect with the block-device or file-image parameters.

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

EXAMPLES         top

       Understanding xfs_info output.

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

         meta-data=/dev/pmem0             isize=512    agcount=8, agsize=5974144 blks
                  =                       sectsz=512   attr=2, projid32bit=1
                  =                       crc=1        finobt=1, sparse=1, rmapbt=1
                  =                       reflink=1
         data     =                       bsize=4096   blocks=47793152, imaxpct=25
                  =                       sunit=32     swidth=128 blks
         naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
         log      =internal log           bsize=4096   blocks=23336, version=2
                  =                       sectsz=512   sunit=0 blks, lazy-count=1
         realtime =none                   extsz=4096   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         top

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

COLOPHON         top

       This page is part of the xfsprogs (utilities for XFS filesystems)
       project.  Information about the project can be found at 
       ⟨http://xfs.org/⟩.  If you have a bug report for this manual page, see
       ⟨http://oss.sgi.com/bugzilla/buglist.cgi?product=XFS⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨git://oss.sgi.com/xfs/cmds/xfsprogs⟩ on 2018-10-29.  (At that time,
       the date of the most recent commit that was found in the repository
       was 2018-08-24.)  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-to-
       date source for the page, or you have corrections or improvements to
       the information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

                                                                 xfs_info(8)

Pages that refer to this page: xfsctl(3)xfs(5)fsadm(8)mkfs.xfs(8)xfs_db(8)xfs_growfs(8)xfs_spaceman(8)