Re: 2.4.20-pre1-ac1: Filesystem panic attempting to mount ext3

From: Stephen C. Tweedie (sct@redhat.com)
Date: Mon Sep 02 2002 - 05:38:34 EST


Hi,

On Sun, Sep 01, 2002 at 09:13:27AM +0200, Alex Riesen wrote:
 
> the problem appeared on the first partition of an ide
> IBM-DHEA-36481 with one fat partition on it. I repartioned
> the device (4 primaries) and "mke2fs -j" three of them.
>
> Than i tried to mount the newly created filesystems and got
> this in syslog:
>
> Sep 1 08:47:32 steel kernel: FAT: Did not find valid FSINFO signature.

Which version of e2fsprogs?

> Assuming that some garbage was left on the disk event after mke2fs,
> i did "dd if=/dev/zero of=/dev/hdd1 bs=512", which cured the problem,
> after being followed by mke2fs.

mke2fs from older versions of e2fsprogs didn't clear out all the
filesystem and md signatures on a new filesystem.

The right way to avoid this is to tell the kernel to mount the fs as
ext2 or ext3 explicitly, not to rely on the fs-type autodetection in
mount().

Cheers,
 Stephen
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