xfs_info(8) — Linux manual page

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

NAME

       xfs_info - display XFS filesystem geometry information

SYNOPSIS

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

DESCRIPTION

       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

       -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

       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

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

COLOPHON

       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
       2024-06-14.  (At that time, the date of the most recent commit
       that was found in the repository was 2024-05-17.)  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), xfs_db(8), xfs_growfs(8), xfs_spaceman(8)

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