{"id":3577,"date":"2022-12-20T17:09:03","date_gmt":"2022-12-20T20:09:03","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/xfs_info-man8\/"},"modified":"2022-12-20T17:09:03","modified_gmt":"2022-12-20T20:09:03","slug":"xfs_info-man8","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/xfs_info-man8\/","title":{"rendered":"xfs_info (man8)"},"content":{"rendered":"

xfs_info<\/h1>\n

NAME<\/a>
SYNOPSIS<\/a>
DESCRIPTION<\/a>
OPTIONS<\/a>
EXAMPLES<\/a>
SEE ALSO<\/a> <\/p>\n

\n

NAME <\/a> <\/h2>\n

xfs_info \u2212 display XFS filesystem geometry information<\/p>\n

SYNOPSIS <\/a> <\/h2>\n

xfs_info<\/b> [ \u2212t<\/b> mtab<\/i> ] [ mount-point<\/i> | block-device<\/i> | file-image<\/i> ]
xfs_info \u2212V<\/b><\/p>\n

DESCRIPTION <\/a> <\/h2>\n

xfs_info<\/b> displays geometry information about an existing XFS filesystem. The mount-point<\/i> argument is the pathname of a directory where the filesystem is mounted. The block-device<\/i> or file-image<\/i> contain a raw XFS filesystem. The existing contents of the filesystem are undisturbed.<\/p>\n

OPTIONS <\/a> <\/h2>\n\n\n\n
<\/td>\n\n

\u2212t<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Specifies an alternate mount table file (default is \/proc\/mounts<\/i> if it exists, else \/etc\/mtab<\/i>). This is used when working with filesystems mounted without writing to \/etc\/mtab<\/i> file – refer to mount<\/b>(8) for further details. This option has no effect with the block-device<\/i> or file-image<\/i> parameters.<\/p>\n<\/td>\n<\/tr>\n

<\/td>\n\n

\u2212V<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Prints the version number and exits. The mount-point<\/i> argument is not required with \u2212V<\/b>.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

EXAMPLES <\/a> <\/h2>\n

Understanding xfs_info output.<\/p>\n

Suppose one has the following “xfs_info \/dev\/sda” output:<\/p>\n

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<\/p>\n

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).<\/p>\n

SEE ALSO <\/a> <\/h2>\n

mkfs.xfs<\/b>(8), md<\/b>(4), lvm<\/b>(8), mount<\/b>(8).<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

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