ext3 filesystem --> read-only

Theodore Tso tytso at mit.edu
Thu Jul 24 18:23:50 UTC 2008

On Thu, Jul 24, 2008 at 11:36:34PM +0530, Balu manyam wrote:
> hey guys -- one of my rhel4 device's ext3 filesystem  went into read only
> state -- i could see the following errors during the same time from syslog
> --  kernel version 2.6.9-67 -- does this ring a bell with anyone ?
> -------------------------
>  kernel: EXT3-fs error (device dm-8): ext3_free_blocks_sb: bit already
> cleared for block 254146

Your filesystem was corrupted, and so e2fsprogs remounted it read-only
to prevent further damage that might lead to data loss.

Unmount it, and run e2fsck to fix the filesystem corruption.  If this
happens again, you may want to check your hardware; a bad or crimped
hard drive cable, or a failing memory module can lead to on-disk
filesystem corruption.

						- Ted

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