7Tb XFS partition lost on reboot

[Amandine AUPETIT <amandine@jamendo.com>]

Hi !
(I'm on Ubuntu 7.10 64 bits)
I have array of 12 750gb disks in hardware Raid 6 that gives me a 7Tb 
partition. I tried to format it in ext3, but it took too much time, so I 
tried in Reiserfs, but the partition were lost on reboot, and now i'm 
trying XFS.

So I created the partition with parted, because fdisk can't do more that 
2tb partitions.
It's ok, I can do what I want but...

on reboot, there is a Superblock problem, something like that. When I 
check with xfs_check :

xfs_check: unexpected XFS SB magic number 0x00000000
xfs_check: read failed: Invalid argument
xfs_check: data size check failed
cache_node_purge: refcount was 1, not zero (node=0x681420)
xfs_check: cannot read root inode (22)
bad superblock magic number 0, giving up

So, I tried to delete the partition with parted, to recreate a new one. 
No problem. But when I mount the new partition, all the data that were 
on my deleted partition are there !!! That's of course not a problem, 
but I'm wondering if there's a way to have this partition work directly 
without having to delete and recreate it ?

I checked the /proc/partition before and after doing parted :

BEFORE
major minor  #blocks  name
 104     0   35532720 cciss/c0d0
 104     1   34025638 cciss/c0d0p1
 104     2          1 cciss/c0d0p2
 104     5    1502046 cciss/c0d0p5
 105     0 7325417080 cciss/c1d0
 105     1  [B]882966102[/B] cciss/c1d0p1

AFTER
major minor  #blocks  name
 104     0   35532720 cciss/c0d0
 104     1   34025638 cciss/c0d0p1
 104     2          1 cciss/c0d0p2
 104     5    1502046 cciss/c0d0p5
 105     0 7325417080 cciss/c1d0
 105     1 [B]7325417046[/B] cciss/c1d0p1


So, any idea what I could do ?

Thanks a lot
Amandine