CentOS - Sep 2009 - Repair Filesystem prompt , after inode has illegal blocks

hi All,

A fault on our SAN dropped us down to a read-only filesystem and after reboot,
we have an "Unexpected Inconsistency" and I am being instructed by the
boot to run fsck manually
without -a or -p  (this was after I think processing around 15% of the
filesystem)

The specific message is  "inode 27344909 has illegal blocks"

I recall running fsck some years ago on smaller and simpler systems - am broadly
familiar with what it is but have no expertise in using it to repair a
filesystem.

Would be grateful for advice on whats the quickest / usual way to get us back up
from
this. We do have a good backup for restoring unrecoverable files - i.e. I assume
I am going
to end up  asking fsck to repair the filesystem itself and then clean up any
mess that
results.

This is fsck 1.39 , Linux version 2.6.18-92.1.18.el5 , Red Hat 4.1.2-42

thanks for any tips.

Cheers

AMcC
Bioinformatics Software Engineer
AgResearch NZ






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At Mon, 14 Sep 2009 11:23:19 +1200 CentOS mailing list <centos at
centos.org> wrote:
> 
> Content-Language: en-US
> 
> 
> hi All,
> 
> A fault on our SAN dropped us down to a read-only filesystem and after
reboot,
> we have an "Unexpected Inconsistency" and I am being instructed
by the boot to run fsck manually
> without -a or -p  (this was after I think processing around 15% of the
filesystem)
> 
> The specific message is  "inode 27344909 has illegal blocks"
> 
> I recall running fsck some years ago on smaller and simpler systems - am
broadly
> familiar with what it is but have no expertise in using it to repair a
filesystem.
> 
> Would be grateful for advice on whats the quickest / usual way to get us
back up from
> this. We do have a good backup for restoring unrecoverable files - i.e. I
assume I am going
> to end up  asking fsck to repair the filesystem itself and then clean up
any mess that
> results.
> 
> This is fsck 1.39 , Linux version 2.6.18-92.1.18.el5 , Red Hat 4.1.2-42
> 
> thanks for any tips.
Just run fsck and follow the prompts.  Do this in single user mode. I
assume that this not a file system with the O/S itself on it (eg it is
not / or /usr or /var, etc.) If it ends up asking to do massive
repairs, it might be that the file system is totally fubar'ed, in which
case, doing a mkfs and doing a complete restore might be what you have
to do.  Be prepaired for this case. It is good that you have a good
backup!
> 
> Cheers
> 
> AMcC
> Bioinformatics Software Engineer
> AgResearch NZ
> 
> 
> 
> 
> 
> 
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> to which it is addressed and may contain confidential and/or privileged
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> taking of any action in reliance upon, this information by persons or
> entities other than the intended recipients is prohibited by AgResearch
> Limited. If you have received this message in error, please notify the
> sender immediately.
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