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 email@example.com. 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 firstname.lastname@example.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)