path: root/Documentation/btrfs-select-super.asciidoc
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authorNicholas D Steeves <>2016-04-23 00:41:30 +0100
committerNicholas D Steeves <>2016-04-23 00:41:30 +0100
commitcec572daccafa1e912cbed363df6f84687778c6f (patch)
tree7d99ab9f73d25c1ed8eaf6393f6374edf5316b03 /Documentation/btrfs-select-super.asciidoc
btrfs-progs (4.4.1-1.1) unstable; urgency=medium
* Non-maintainer upload. * New upstream release. * Rename package to btrfs-progs (Closes: #780081) * Update standards version to 3.9.7 (no changes needed). * debian/control: Add "Breaks" per Gianfranco Costamagna's suggestion * Change lintian override to reflect package rename * Switch from using postinst and postrm to using triggers per Christian Seiler's recommendation. # imported from the archive
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+btrfs-select-super - overwrite superblock with a backup
+*btrfs-select-super* -s number dev
+*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.
+-s|--super <superblock>::
+use <superblock>th superblock copy, valid values are 0 up to 2 if the
+respective superblock offset is within the filesystem
+`btrfsck check`(8)