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SubjectRe: Problems with large ext2 fs in 2.0

On Tue, 10 Sep 1996 07:24:24 -0400 (EDT), Grant Guenther
<> said:

> After a total failure of a disk in my news server last week, I had to
> reinstall the entire system. ...

> BUT - I'm now getting regular FS corruption - illegal and duplicated blocks -
> all over one of the file systems - a 2G ext2 partition. There are no
> disk errors logged. Multiple fsck runs seem to keep finding bitmap
> differences - which strongly suggests a hardware problem.

> The disk is a 2G IDE drive. There's another 1.2 G drive in the system,
> with a 1G ext2 FS on it that has no problems whatever.

It certainly sounds like bad hardware. I've seen exactly this sort of
problem before, and in that case it was a pair of Seagate IDE drives
which were simply buggy, and which when paired on a single IDE
controller consistently gave silent data corruption which would bring
down the news server within a couple of days, max. In my case keeping
all the disks on separate IDE channels sorted things, but if your
problem is a surface defect rather than controller problems then
replacing the disks is the only choice.

Before doing that, try reseating and, if you can, replacing all of the
cables between controller and disks. Bad cables are a common
problem. Also make sure that all of your busy disks are on separate

Stephen Tweedie <>
Department of Computer Science, Edinburgh University, Scotland.

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