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Re: how to prevent filesystem check



use 'noload' option to mount the readonly ext3 filesystem on the slave
host, so the journal will not be loaded.

BTW, this kind of setting could have some cache-coherence problem. why
not do it correct way by using some kind of network filesystem (NFS)
or clustering filesystem (GFS,Lustre)?

On 11/28/06, Sebastian Reitenbach <itlistuser rapideye de> wrote:
Hi all,

I want to setup a RAID storage system, where i have two systems connected to
it. the filesystems are mapped out to both connectors. I want the master host
mount them read write, and the slave read only.

in my fstab on the slave I have a line like the following:
/dev/sdb1   /mount    ext3   acl,noauto,user_xattr,nosuid,ro    0 0

so in man 5 fstab, it is written, that when the 6. field is 0, no filesystem
check will be done at mount time.

and in man mount, I read that, the nocheck parameter is the default, that
means, that no filesystem checks should be performed when the partition is
mounted.

but when I mount the filesystem on the slave, I see the following messages
in /var/log/messages:
EXT3-fs: mounted filesystem with ordered data mode.
EXT3-fs: INFO: recovery required on readonly filesystem.
EXT3-fs: write access will be enabled during recovery.
(fs/jbd/recovery.c, 255): journal_recover: JBD: recovery, exit status 0,
recovered transactions 99610 to 100072
(fs/jbd/recovery.c, 257): journal_recover: JBD: Replayed 12498 and revoked
589/918 blocks
kjournald starting.  Commit interval 5 seconds
EXT3-fs: recovery complete.


since I test this, the master server had occassional problems with the
filesystem, so he decided to mount these read-only, and I had to fsck it.
I think the filesystem got destroyed because of the filesystem ckecks, while
mounting it readonly on the second server.

I googled around, and found a similar message from someone mounting a XFS file
system. So I am not sure, whether this is a mount or a ext3 problem.

my kernel is a 2.6.12.6-bigsmp, on a SuSE 10.1.

Is there any other way to prevent the slave server from doing any filesystem
checks?


kind regards
Sebastian

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