Can't mount ddrescued Mac HDD - please help

Asked by Arthur Areyan on 2013-04-22

Hello there. I am very new to the world of Ubuntu but learning as I go along, but apparently not enough to help a friend in need. Long story short: my friend's son with a MacBook Pro laptop was editing a video when his laptop just shutoff. Then came the clicking sound and the morbid realization that there's no backup - three years worth of undergraduate studies went up in smoke. I poured over the forums, built a simple Intel-based PC, installed an Ubuntu distribution and started learning how to recover his work. The imaged his corrupt 250GB HDD (assuming it's Ext3 Journaled fs) onto a brand new 500GB WD drive using Ubuntu Recovery Kit CD (used -f -n switches). Six hours later had an image done. But know I can't mount the drive. The GUI interface (I booted off of a dedicated SATA Ubuntu drive with that 500GB hooked up as a tandem drive). The GUI Ubuntu in Computer lists it as "500 GB drive: 250 GB File System", but it can't mount it with the following error message:
Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda2,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail or so
I tried fdisk -l and this what I get:
root@owner-desktop:~# fdisk -l

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00002161

   Device Boot Start End Blocks Id System
/dev/sda1 1 488397167 244198583+ ee GPT
Partition 1 does not start on physical sector boundary.

Disk /dev/sdb: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00053bdb

   Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 310523903 155260928 83 Linux
/dev/sdb2 310525950 312580095 1027073 5 Extended
/dev/sdb5 310525952 312580095 1027072 82 Linux swap / Solaris
what in the world is '/dev/sda'! and what do I do know? Notice that the PC is running off of dev/sdb and that the 500GB drive became an sda drive.
I can feel the data is there but how do I get to it. Arghhh. I need your help folks - the last thing I want is give this kid bad news and his family is not in a position to shell out $$$$ for data recovery. Any help is greatly appreciated. I know very little when it comes to Ubuntu so if you could please spell all the commands out, i.e. here's step 1, step 2, etc. Thank you! Arthur

Question information

English Edit question
Ubuntu util-linux Edit question
No assignee Edit question
Last query:
Last reply:

Teach the kid how to backup. What a dufus. Mind you, Mac users are far from smart. You can mount the ddrescue image like anything else. It is a block device.

Arthur Areyan (aargo1) said : #2

@actionparsnip, the kid been depressed ever since and will certainly learn his lesson. In the meantime, based on what I described why can't I mount that hdd. Does it need to be mounted from a particular block? How can I find out if the fs is intact, or is it ext3 or ext4. Obviously need to learn a lot more, but between my crazy job and my kid, I have just enough time to breathe. Any help is greatly appreciated. TY. Arthur

you can mount the image you made. didnt you say you used ddrescue to make an image?

Can you help with this problem?

Provide an answer of your own, or ask Arthur Areyan for more information if necessary.

To post a message you must log in.