Recover exented superblock

[Chocrates]

I was following http://www.howtoforge.com/linux_resi...xt3_partitions and when i reboot and run:

root@Microknoppix:/home/knoppix# fsck -n /dev/sda7
fsck from util-linux-ng 2.17.2
e2fsck 1.41.12 (17-May-2010)
fsck.ext2: Superblock invalid, trying backup blocks...
fsck.ext2: Bad magic number in super-block while trying to open /dev/sda7

The superblock could not be read or does not describe a correct ext2
filesystem. If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>



so i ran e2fsck with all the block numbers that you need (forget exactly what tool i used to find where the superblocks are hidden) no dice

then i ran testdisk and had it look for the superblock, no results


anyone have any ideas?


fdisk -l for reference:

root@Microknoppix:/home/knoppix# fdisk -l

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x97646c29

Device Boot Start End Blocks Id System
/dev/sda1 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 38912 312046593 f W95 Ext'd (LBA)
/dev/sda5 64 326 2104320 82 Linux swap / Solaris
/dev/sda6 * 327 2938 20972544 83 Linux
/dev/sda7 2938 37897 280815685 83 Linux
/dev/sda8 37898 38912 8152956 83 Linux