Unable to list partition of external HD

[Setya]

Hi all,

I have an old external 20GB HD formatted with NTFS. It used to be able to mount in Ubuntu just fine.

One day I copied a huge file into it, then suddenly it failed to mount. Initially the message was something like the following:

Error mounting: mount exited with exit code 13: ntfs_attr_pread_i: ntfs_pread failed: Input/output error
Failed to read NTFS $Bitmap: Input/output error
NTFS is either inconsistent, or there is a hardware fault, or it's a
SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
then reboot into Windows twice. The usage of the /f parameter is very
important! If the device is a SoftRAID/FakeRAID then first activate
it and mount a different device under the /dev/mapper/ directory, (e.g.
/dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation
for more details.

After several failed attempts to rescue the content using ddrescue, now I can not see /dev/sdb partition at all.

Here's the result of fdisk -l command:

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe7a2e7a2

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        2249    18065061   83  Linux
/dev/sda2            2250       14593    99153180    5  Extended
/dev/sda5            2250        4802    20506941   82  Linux swap / Solaris
/dev/sda6            4803       14593    78646176   83  Linux

As you can see the above list doesn't contain /dev/sdb. But when I plug the external HD, the connection light always turns green.

If possible I want to save the data and reformat it into NTFS again, but in order to do that at least I have to get /dev/sdb enlisted don't I ?


Any help would be greatly appreciated.

Best Regards,

Setya

[Irithori]

Sorry, but this harddisc is dead.