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ext3-Partition lost after crash !?



Hi,

hoping that someone on this list can help me here is the Problem.

After a crash it seems the journal could not be recovered.

This is what mount gives:
root wuehlkiste:# mount -t ext3 /dev/hdb2 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/hdb2,
       or too many mounted file systems

and this is the corresponding logfile-entry:
Nov 27 11:16:13 wuehlkiste kernel: attempt to access beyond end of device
Nov 27 11:16:13 wuehlkiste kernel: 03:42: rw=0, want=66849792, limit=2498107
Nov 27 11:16:13 wuehlkiste kernel: JBD: IO error reading journal superblock
Nov 27 11:16:13 wuehlkiste kernel: EXT3-fs: error loading journal.

fsck failed as well:
root wuehlkiste:# fsck -f /dev/hdb2
fsck 1.27 (8-Mar-2002)
e2fsck 1.27 (8-Mar-2002)
/dev/hdb2: Invalid argument while reading block 16712447

/dev/hdb2: Invalid argument reading journal superblock

fsck.ext2: Invalid argument while checking ext3 journal for /dev/hdb2

AT last here's what tune2fs -l gives:
root wuehlkiste:# tune2fs -l /dev/hdb2
tune2fs 1.27 (8-Mar-2002)
Filesystem volume name:   <none>
Last mounted on:          <not available>
Filesystem UUID:          60ae4fae-f11b-4156-ade8-1aa1b63d3bc5
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal filetype needs_recovery sparse_super
Filesystem state:         clean with errors
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              262144
Block count:              524112
Reserved block count:     26205
Free blocks:              185025
Free inodes:              242316
First block:              0
Block size:               4096
Fragment size:            4096
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         16384
Inode blocks per group:   512
Last mount time:          Mon Nov 25 12:40:35 2002
Last write time:          Mon Nov 25 13:49:25 2002
Mount count:              16
Maximum mount count:      -1
Last checked:             Sun Nov 17 18:40:27 2002
Check interval:           0 (<none>)
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               128
Journal UUID:             <none>
Journal inode:            8
Journal device:           0x0000
First orphan inode:       0

Even clearing the has_journal and needs_recovery flags produced the same
output using fsck as above.

Running e2salvage on this backup-partition (/dev/hdb1 is the 'real'
partition, /dev/hdb2 was written using dd) didn't help much as well.

Hoping for some suggestions how to safe my data, since last backup was two
month old :-(

Regards
-- 
        Stephan Wiehr
http://www.asta.uni-sb.de/~lynx/
"Always remember: You're unique,
        just like everyone else."





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