There's ad-hoc comment for various commands to recover from filesystem
errors.
But what do they actually do and when should what command be used?
(The wiki gives scant indication other than to 'blindly' try things...)
There's:
mount "-o recovery,noatime"
btrfsck:
--repair try to repair the filesystem
--init-csum-tree create a new CRC tree
--init-extent-tree create a new extent tree
And there is "scrub"...
What do they do exactly and what are the indicators to try using them?
Or when should you 'give up' on a filsystem and just retrieve whatever
data can be read and start again?
All that lot sounds good for a wiki page ;-)
Thanks,
Martin
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