Filesystem corruption on 2.4.20-rc1?

Hi,
has anyone seen filesystem (ext3) corruption on 2.4.20-rc1? I've just
upgraded and am now trying to get back as much as of data as possible but its not looking pretty. fsck is saying no valid superblock (and I can't find a backup super block :( ). I've got 3 disk on seperate controllers and they have all got some form of corruption

If there is any more info please ask and I will see what I can dig out. ATM I'm just trying to get the machine booting and recover some of my mp3 collection :)

Rus

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