2014-04-02 08:29:18 +00:00
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btrfs-check(8)
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==============
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NAME
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----
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2014-12-18 15:04:10 +00:00
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btrfs-check - check or repair an unmounted btrfs filesystem
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2014-04-02 08:29:18 +00:00
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SYNOPSIS
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--------
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2014-05-19 15:49:35 +00:00
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*btrfs check* [options] <device>
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2014-04-02 08:29:18 +00:00
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DESCRIPTION
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-----------
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2014-12-18 15:04:10 +00:00
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*btrfs check* is used to check or repair an unmounted btrfs filesystem.
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2014-04-02 08:29:18 +00:00
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2014-12-18 15:04:10 +00:00
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NOTE: Since btrfs is under development, the *btrfs check* capabilities are
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continuously enhanced. It's highly recommended to read the following btrfs
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wiki before executing *btrfs check* with '--repair' option: +
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2014-04-15 07:04:51 +00:00
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https://btrfs.wiki.kernel.org/index.php/Btrfsck
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2014-05-19 15:49:35 +00:00
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*btrfsck* is an alias of *btrfs check* command and is now deprecated.
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2014-04-16 16:33:44 +00:00
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2014-04-02 08:29:18 +00:00
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OPTIONS
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-------
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2014-05-19 15:08:56 +00:00
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-s|--super <superblock>::
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2014-12-18 15:04:10 +00:00
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use <superblock>th superblock copy, valid values are 0 up to 2 if the
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respective superblock offset is within the fileystem
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2014-04-02 08:29:18 +00:00
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--repair::
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2014-12-18 15:04:10 +00:00
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try to repair the filesystem
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2014-04-02 08:29:18 +00:00
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--init-csum-tree::
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2014-12-18 15:04:10 +00:00
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create a new CRC tree and recalculate all checksums
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2014-04-02 08:29:18 +00:00
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--init-extent-tree::
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2014-12-18 15:04:10 +00:00
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create a new extent tree
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2014-05-28 11:22:40 +00:00
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--check-data-csum::
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2014-12-18 15:04:10 +00:00
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verify checkums of data blocks
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--qgroup-report::
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verify qgroup accounting and compare against filesystem accounting
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2014-10-30 06:34:06 +00:00
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--subvol-extents <subvolid>::
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2014-12-18 15:04:10 +00:00
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show extent state for a subvolume
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--tree-root <bytenr>::
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use the given bytenr for the tree root
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2014-04-02 08:29:18 +00:00
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EXIT STATUS
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-----------
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2014-09-19 01:49:59 +00:00
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*btrfs check* returns a zero exit status if it succeeds. Non zero is
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2014-04-02 08:29:18 +00:00
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returned in case of failure.
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AVAILABILITY
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------------
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2014-05-19 16:04:26 +00:00
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*btrfs* is part of btrfs-progs.
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2014-04-02 08:29:18 +00:00
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Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for
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further details.
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SEE ALSO
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--------
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`mkfs.btrfs`(8),
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`btrfs-scrub`(8),
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`btrfs-rescue`(8)
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