Re: 2.6.19: File system corruption "stuck" until device is replugged

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On Fri, 22 Dec 2006, Andrey Borzenkov wrote:

I had USB stick (fat32) that reported file system corruption on mount and
hence was mounted read-only. No amount of umount/dosfsck/mount could make it
rw again. dosfsck reported device as clean but it still would mount ro and I
continued to see directory that had been deleted by the very first dosfsck
run! I unplugged it, looked under Win2k - it was OK - and only then did I
notice that directory claimed as corrupted did not even exist. Replugging
it - mounted OK.

I am not sure if this is a bug or "work as designed". May be this is specific
fat32 problem; still it does not look right?

I think at the first mount time there was a read error for an unknown reason, and this turned the partition (not the filesystem) into read-only mode. All further mount attempts only found a read-only medium, and thus where only able to mount read-only. I've been bitten by this more than once, too - there seems to be no way to avoid a reboot/replug when one of your data disks has thrown a read error, taking (for me) the whole server down, when just one unimportant data-disk thinks it has problems again (as happens with my home-server about once every one or two weeks).

c'ya
sven

--

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