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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | COLOPHON |
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xfs_info(8) System Manager's Manual xfs_info(8)
xfs_info - display XFS filesystem geometry information
xfs_info [ -t mtab ] [ mount-point | block-device | file-image ]
xfs_info -V
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.
-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.
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).
mkfs.xfs(8), md(4), lvm(8), mount(8).
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
2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2025-06-23.) 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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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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