XFS: can't read superblock

[Mathieu GOMBAULT <qwerty@xxxxxxxxx>]

Hello

I installed my home directory on an xfs partition under a Debian, kernel 
2.6.7.
But there has been a kind of 'crash' and, now, when trying to mount it, 
I get the following message:
qwerty@Pegasus:~$;-) sudo mount -t xfs /dev/hdd1 /mnt/
mount: /dev/hdd1: can't read superblock

Is it possible to get my partition back (I had about 60 Go of important 
documents on it...), or to save my documents? If so, how and what can I do?
I hope one of you may help me!

Thanks  in advance

Mathieu GOMBAULT