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btrfs-progs: doc: document btrfs-select-super(8)

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Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: David Sterba <dsterba@suse.com>
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Adam Borowski 2015-09-02 05:00:46 +02:00 committed by David Sterba
parent 11b81f475f
commit 13be89d82e
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1
Documentation/Makefile.in
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@ -9,6 +9,7 @@ MAN8_TXT += btrfs-find-root.asciidoc
MAN8_TXT += btrfs-image.asciidoc
MAN8_TXT += btrfs-map-logical.asciidoc
MAN8_TXT += btrfs-show-super.asciidoc
MAN8_TXT += btrfs-select-super.asciidoc
MAN8_TXT += btrfstune.asciidoc
MAN8_TXT += fsck.btrfs.asciidoc
MAN8_TXT += mkfs.btrfs.asciidoc

29
Documentation/btrfs-select-super.asciidoc Normal file
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@ -0,0 +1,29 @@
btrfs-select-super(8)
=====================
NAME
----
btrfs-select-super - overwrite superblock with a backup
SYNOPSIS
--------
*btrfs-select-super* -s number dev
DESCRIPTION
-----------
*btrfs-select-super* destructively overwrites all copies of the superblock
with a specified copy. This helps with certain cases of damage, especially
when barriers were disabled during a power failure. You can find a valid
copy of the superblock with *btrfs check -s*.
The filesystem specified by `dev` must not be mounted.
OPTIONS
-------
-s|--super <superblock>::
use <superblock>th superblock copy, valid values are 0 up to 2 if the
respective superblock offset is within the filesystem
SEE ALSO
--------
`btrfsck check`(8)