Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I've used ddrescue successfully in the past but I'm having no luck this time. Usually, I make an image of the partition, run a fsck or whatever else on the image to fix file system errors, mount it and I'm good to go. However, this image is not able to be mounted. When I try to mount it in Linux, using...

mount -t ntfs -o loop image.img /mnt/img

I get this message...

NTFS signature is missing.

Failed to mount '/dev/loop/0': Invalid argument

The device '/dev/loop/0' doesn't seem to have a valid NTFS.

I have tried with -t ntfs-3g as well and it makes no difference. I've even tried mounting the image in Windows so I could run chkdsk on it but it shows as a raw volume. I have tried testdisk and it doesn't see a proper NTFS partition. One thing that is odd in testdisk is that it is showing the drive size as 317 / 295 GiB. I'm still trying to figure out testdisk but any help would be appreciated. I really don't have a good understanding of hard drives so I may have omitted something that's important in figuring this out. If so please let me know and I will update the question. Thanks!

-- Adding output from sfdisk -l --

Device Boot Start End #cyls #blocks Id System

/dev/sda1 * 0+ 12- 13- 102400 7 HPFS/NTFS/exFAT

/dev/sda2 12+ 38650- 38639- 310360064 7 HPFS/NTFS/exFAT

/dev/sda3 38651 38912 262 2104515 c W95 FAT32 (LBA)

/dev/sda4 0 - 0 0 0 Empty

I need data from sda2.

share|improve this question
How big is the disk you are cloning and how big is the HD? What is the output of fdisk -l? You may also take a look at dd_rescue. – jmreicha Mar 26 '13 at 13:49
@jmreicha I added the output from sfdisk -l to the question above. For some reason fdisk just freezes but sfdisk worked fine. – Vincent Mar 26 '13 at 15:44
Take a look at this,…. This guy says you may have to mount the partition at the offset in order to get it to work correctly. – jmreicha Mar 26 '13 at 17:56

You must log in to answer this question.

Browse other questions tagged .