how to prevent filesystem check
Andreas Dilger
adilger at clusterfs.com
Thu Nov 30 05:53:34 UTC 2006
On Nov 29, 2006 16:41 -0800, Wolber, Richard C wrote:
> On Nov 28, 2006 9:20pm Andreas Dilger wrote:
> > On Nov 28, 2006 12:33 -0800, Wolber, Richard C wrote:
> > > Running the following command on your slave server should
> > > do the trick:
> > >
> > > echo "AUTOFSCK_DEF_CHECK=\"no\"" >> /etc/sysconfig/autofsck
> >
> > This is incorrect. As soon as the ext3 code mounts the
> > filesystem it will do journal recovery and potentially
> > corrupt the filesystem.
> > Then, the read-only copy will become out-of-date in the cache
> > of that client and it will get bogus data back, eventually
> > deciding that the filesystem is corrupt (whether it is or not).
>
> Even if you "mount -oro -text2 $DEV $DIR"?
Even then, yes. It is NOT SAFE to access the same block device on
multiple nodes at one time. Even with "-o ro" the mount will cause
the journal to be recovered.
Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.
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