xfs_info(8) — Linux manual page


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,
       send it to linux-xfs@vger.kernel.org.  This page was obtained from
       the project's upstream Git repository
       ⟨https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git⟩ on
       2020-07-14.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-04-14.)  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


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