On 7/16/14, 9:55 PM, Daniel wrote:
> Hi,
>
> Had some questions about automatic boot-time fsck, following a power-loss or
> hard-shutdown, etc.
> All prior research (web searching, etc) on this has been inconclusive.
>
> 1) Does it do a real fsck or only a journal playback?
By default, e2fsck at boot time only replays the journal if
needed.
A full fsck at boot time is generally only done if:
*) The filesystem was marked with an error prior to the fsck due
to a runtime metadata error
*) Mount-count or time-based thresholds have been reached
(newer mke2fs doesn't set these threshold by default)
> 2) If it's a real fsck, is it done in repair mode or diagnostic mode?
Depends on how initscripts invoke it, but most likely
it is in preen ("repair the easy stuff") mode.
> Also, do the answers depend/vary according to ext4 version or anything else?
yep, see above, w.r.t. initscript behavior, older/newer mke2fs,
e2fsck.conf, mke2fs.conf, etc ;)
-Eric
> Thank you
>
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