9.0 install and journaling

Da Rock freebsd-questions at herveybayaustralia.com.au
Sun Dec 11 05:45:39 UTC 2011

On 12/11/11 10:23, RW wrote:
> On Sun, 11 Dec 2011 08:17:41 +1000
> Da Rock wrote:
>>> SUJ speeds up the check a lot, seconds as opposed to minutes.  If
>>> something happens to the journal, it falls back to a standard fsck.
>> But fsck needs to be run manually- I have users that can't do that,
>> and the filesystem corrupts. Ergo gjournal; it boots up and fixes on
>> the fly. So SU+J needs a manual fsck before booting proper or can it
>> just boot and be done?
> It's not very different; gjournal and SU both attempt to leave the
> filesystem in an coherent state, but both still need a preen to
> recover lost space. In either case the preen can fail requiring a full
> fsck.
> Journalled SU make SU behave more like gjournal in that you can do a
> fast foreground check which avoids the lengthy background fsck and
> avoids deferring the handling of unexpected inconsistencies to the next
> boot.
Yes, but I don't do a fsck to recover gjournal- it has a miniscule blurp 
for a nanosecond and prints a message at boot and thats it. Is it the 
same with su+j? If it does then I'll drop gjournal (and the performance 
hit) and I'll use su+j when I jump to 9.0.

I've never done fsck on a gjournal (yet).

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