DDRescue-GUI

(OS X El Capitan) Aborted when image full, no mountable file systems

Asked by ctawn

I'm using v1.4 and was pleased to see apparently great success with recovering a 1.5TB disk to a sparse image bundle (OS X El Capitan). Unfortunately I'm not sure what to do now.

I had limited capacity on a spare volume so I made a 1.4TB sparse image bundle for my target. I didn't think the data on the source volume would come close to that. As I said it's capacity was 1.5TB and there was plenty of room to spare before it crashed.

When DDRescue reached 1399.00 GB of recovered data, 1399 GB for input and output position, and 93% completion, it seemed to progress no further. So I hit abort. Now the progress wheel has been spinning for 15-20 mins with no signs of stopping.

I tried to mount the recovery image, but OS X says no mountable file systems.

DDRescue reported only 125 bad sectors and average read rate was at a steady 20000 kb/s when not encountering errors which were mostly at the beginning.

What do I do now?

Question information

Language:
English Edit question
Status:
Solved
For:
DDRescue-GUI Edit question
Assignee:
Hamish McIntyre-Bhatty Edit question
Solved by:
ctawn
Solved:
Last query:
Last reply:
Revision history for this message
ctawn (charlestawn) said : 		#1

found a solution that worked for me here:

http://superuser.com/questions/14800/tools-tips-to-recover-data-from-a-corrupt-dmg-disk-image

in terminal:
hdiutil mount -nomount -readwrite /path/to/diskimage.sparsebundle

Then repair with DiskWarrior (5)!

I had to force quit ddRescue-GUI after abort and letting it sit spinning progress wheel for several hours.

result: 4 million files, 10 thousand damaged.

Revision history for this message
Hamish McIntyre-Bhatty (hamishmb) said : 		#2

Hi,

Sorry about this! I'm not sure what's happened here, but glad you found a solution.
I'll need to ask you some stuff to try and diagnose the problem, because I've not encountered anything like this before!
Those sound like pretty good recovery stats to me, so hopefully you got the data you needed.

Did you see any weird messages in the terminal output box or see any error dialogs?

If you haven't rebooted your Mac, could you post the contents of the log file at /tmp/ddrescue-gui.log?
If you're not sure how to do that I can provide you with some better instructions.

Thanks for reporting this,
Hamish

Revision history for this message
ctawn (charlestawn) said : 		#3

I did get most of what I needed and the rest I can get again mostly. So good results, yes.

Nothing weird in terminal output, no error dialogs. unfortunately i have rebooted.

it does seem there must be an issue with running out of capacity on an image, but you'd of course know that best. this is my only test case so far. i have another dead drive i had give up on that i will also try.

Revision history for this message
ctawn (charlestawn) said : 		#4

marking solved, as i am sure there's nothing more to be done. that info i provided on mounting & fixing the non-mountable file system might really be helpful in docs/help/etc.

Revision history for this message
Hamish McIntyre-Bhatty (hamishmb) said : 		#5

Yep, I'm sure they will be helpful, so thank you.

I'm not sure what's gone wrong here, but I'll make sure I review that code to see if I can find some instances where it would do this.

Thanks,
Hamish