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+.ft CW
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+..
+
+.TH xfs_info 8
+.SH NAME
+xfs_info \- display XFS filesystem geometry information
+.SH SYNOPSIS
+.B xfs_info
+[
+.B \-t
+.I mtab
+]
+[
+.I mount-point
+|
+.I block-device
+|
+.I file-image
+]
+.br
+.B xfs_info \-V
+.SH DESCRIPTION
+.B xfs_info
+displays geometry information about an existing XFS filesystem.
+The
+.I mount-point
+argument is the pathname of a directory where the filesystem
+is mounted.
+The
+.I block-device
+or
+.I file-image
+contain a raw XFS filesystem.
+The existing contents of the filesystem are undisturbed.
+.SH OPTIONS
+.TP
+.B \-t
+Specifies an alternate mount table file (default is
+.I /proc/mounts
+if it exists, else
+.IR /etc/mtab ).
+This is used when working with filesystems mounted without writing to
+.I /etc/mtab
+file - refer to
+.BR mount (8)
+for further details.
+This option has no effect with the
+.IR block-device " or " file-image
+parameters.
+.TP
+.B \-V
+Prints the version number and exits. The
+.I mount-point
+argument is not required with
+.BR \-V .
+.SH "EXAMPLES"
+
+Understanding xfs_info output.
+.PP
+Suppose one has the following "xfs_info /dev/sda" output:
+.PP
+.RS 2
+.Vb
+\&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
+.Ve
+.RE
+.PP
+
+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).
+.SH SEE ALSO
+.BR mkfs.xfs (8),
+.BR md (4),
+.BR lvm (8),
+.BR mount (8).