TestDisk hangs at a particular cylinder

How to use TestDisk to recover lost partition
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hfeng
Posts: 3
Joined: 15 Jun 2015, 16:17

TestDisk hangs at a particular cylinder

#1 Post by hfeng » 15 Jun 2015, 16:38

Need help!

I have a 2TB Seagate HDD with two partitions: F and G. Somehow all the files in G disappeared suddenly and the drive shows as "Raw" in Windows 7. But F still works fine.

Then I turned to TestDisk, which can see this partition. But a quick search found nothing, only with the warning message: the filesystem may be damaged.

Then I ran a deeper search, and Testdisk seemed to find a few bad sectors after many hours with these lines (from my memory, so it may be inaccurate)

HFS + 11387 432 ...

But it then stalled at
Analyze cylinder 16387/132755: 12%

It got stuck in this status for several hours with 0 CPU utilization and did not respond to any key. Finally I gave up and killed the process.

I then restarted the tool and ran the deeper search again. This time it scanned through the previous cylinders fairly quickly. But it again got stuck at this particular cylinder with a new error message:

Read error at 16387/222/47 (lba=247785472)

So I'm wondering what the best step to take next.

Many thanks,
hfeng

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Fiona
Posts: 2836
Joined: 18 Feb 2012, 17:19
Location: Ludwigsburg/Stuttgart - Germany

Re: TestDisk hangs at a particular cylinder

#2 Post by Fiona » 17 Jun 2015, 07:57

Bad sectors can cause that an OS and software hang or stop reading your data due to read errors.
In case, cloning might help.
Can you check your disk using CrystalDiskInfo first?
http://crystalmark.info/download/index-e.html
Please download the portable version, because the installer (exe) contains the adware open candy.

Fiona

hfeng
Posts: 3
Joined: 15 Jun 2015, 16:17

Re: TestDisk hangs at a particular cylinder

#3 Post by hfeng » 17 Jun 2015, 15:29

Thanks a lot!
Disk.jpg
Disk.jpg (245.62 KiB) Viewed 2316 times
The screenshot is here.

I'll try the cloning step. But please pardon me for being a new user, which tool do you you recommend for carrying out this talk, TestDisk or CrystalDiskInfo?

Best,
hfeng

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Fiona
Posts: 2836
Joined: 18 Feb 2012, 17:19
Location: Ludwigsburg/Stuttgart - Germany

Re: TestDisk hangs at a particular cylinder

#4 Post by Fiona » 19 Jun 2015, 05:43

DD or ddrescue could help:
http://www.cgsecurity.org/wiki/Damaged_Hard_Disk
On Windows, Acronis True Image and sector copy could help too.

Fiona

hfeng
Posts: 3
Joined: 15 Jun 2015, 16:17

Re: TestDisk hangs at a particular cylinder

#5 Post by hfeng » 19 Jun 2015, 05:48

Great! Will try that. Many thanks!

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