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Re: Disk drive recovery help



On 08.04.09 08:50, tony mollica wrote:
> Thorny, I know what you're asking, I just wasn't clear.  But yes, the
> partition is there (or here):
>
> fdisk -l output:
>
> Disk /dev/sdg: 184.4 GB, 184416067584 bytes
> 255 heads, 63 sectors/track, 22420 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sdg1   *           1        7295    58597056   83  Linux
> /dev/sdg2            7296       22420   121491562+   f  W95 Ext'd (LBA)
> /dev/sdg5            7296       14590    58597056   83  Linux
> /dev/sdg6           14591       22420    62894443+  83  Linux
>
>
> I'm having no problems with the extended partitions, only the first
> primary.  All the number look good, just doesn't recognize sdg1
> for mounting, or for fsck.
>
> # fsck /dev/sdg1
> fsck 1.40-WIP (14-Nov-2006)
> e2fsck 1.40-WIP (14-Nov-2006)
> fsck.ext2: No such file or directory while trying to open /dev/sdg1
>
> 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>
>
> All the partitioning software and disk utilities find the partitions. The
> first primary partition is not found or recognized.  Tried backup
> superblocks too, but if it doesn't find the device, it won't find the
> data.
>
> All the data is there, I can see it with testdisk, I just can't retrieve
> or do anything with it.

try to issue command "mke2fs -n -v /dev/sdg1" which should give you hints
on where could superblock backups be, for example:

mke2fs 1.41.3 (12-Oct-2008)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
1224000 inodes, 4887776 blocks
244388 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
150 block groups
32768 blocks per group, 32768 fragments per group
8160 inodes per group
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
	4096000

Then, you can try to give those numbers to e2fsck:

e2fsck -b 32768 /dev/sdg1


Hopefully one of those blocks will be real and working superblock.
-- 
Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
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