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WD Disk - too many bad sectors - incredibly slow back up process

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August 5, 2011 11:20:22 AM

First of all sorry for my poor English

I have a WD Caviar Green 1TB (WD10EARS-00Y5B1), which seems has many problems.

3 partition:
1: 286GB
2: 378GB
3: 288GB

Western Digital Data LifeGuard said "too many bad sectors".

HDD Regenerator finds permanent Delays and continuous Bad Sectors after 26% of process (more than 800,000 bad sectors).

Spinrite could regenerate some sectors in first two partitions but returned critical error on 3rd partition.

Windows detects the disk and partitions and show the folders and files, but extremely slow reading or copying.

Is there anyway to repair the disk?

I tried to back up data but the transfer is incredibly slow. Raw Copy 1.2 transferred with less than KB and expect more than 150,000 hours to finish the process.
Is the board damaged too? any way too repair?

Any suggestion for a software which could copy (back up) files from a damaged hard disk? I'm aware that there are applications which can skip bad sectors but it doesn't seem to be enough in my case. Although first and second partitions seem OK, the transfer speed is awful, even copying sectors which aren't bad (about hours for 10MB)

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a c 386 G Storage
August 5, 2011 11:49:48 AM

There is no way to repair the disk. You're just going to have to copy as much data as you can. If the drive is under warranty, contact WD and they will replace the drive.

Backup software is going to be slow. Bad sectors that aren't currently marked bad in the sector map are going to slow things down. The software will try to read the data off a sector several times before it gives up and marks the sector bad. There is some software out there that lets you turn the "retry on error" down to zero, but I'm not sure which those ones are at the moment.
August 5, 2011 2:37:24 PM

I don't wanna get the disk repaired anymore, I just want to backup the files which are still ok...
Any idea?
August 8, 2011 7:28:56 PM

Any suggestion about recovery application other than HDD Regenerator and Spinrite???
a c 326 G Storage
August 11, 2011 10:27:10 PM

Data recovery professionals will tell you that HDD Regenerator and Spinrite are potential drive killers. Your drive appears to have bad media or weak heads. SpinRite will hammer away at a bad sector up to several thousand times, while hoping for 1 good read. This methodology can accelerate the total failure of your drive.

Your best DIY approach would be to clone your drive sector-by-sector using a tool that knows how to work around bad sectors, and then use data recovery software on the clone.

Some freeware cloning tools are ...

dd_rescue: http://www.garloff.de/kurt/linux/ddrescue/
ddrescue: http://www.gnu.org/software/ddrescue/ddrescue.html

Comparison between ddrescue and dd_rescue:
http://www.forensicswiki.org/wiki/Ddrescue

Ddrescue can perform multipass cloning. It clones the easy sectors on the first pass, and attempts the more difficult ones on subsequent passes. It can also clone your drive in reverse, thereby disabling lookahead caching. It keeps a log, allowing it to resume after an interruption.

The following thread discusses various freeware and commercial cloning tools:
http://forum.hddguru.com/the-best-disk-cloning-hardware...
August 12, 2011 8:48:57 AM

fzabkar said:
Data recovery professionals will tell you that HDD Regenerator and Spinrite are potential drive killers. Your drive appears to have bad media or weak heads. SpinRite will hammer away at a bad sector up to several thousand times, while hoping for 1 good read. This methodology can accelerate the total failure of your drive.

Your best DIY approach would be to clone your drive sector-by-sector using a tool that knows how to work around bad sectors, and then use data recovery software on the clone.

Some freeware cloning tools are ...

dd_rescue: http://www.garloff.de/kurt/linux/ddrescue/
ddrescue: http://www.gnu.org/software/ddrescue/ddrescue.html

Comparison between ddrescue and dd_rescue:
http://www.forensicswiki.org/wiki/Ddrescue

Ddrescue can perform multipass cloning. It clones the easy sectors on the first pass, and attempts the more difficult ones on subsequent passes. It can also clone your drive in reverse, thereby disabling lookahead caching. It keeps a log, allowing it to resume after an interruption.

The following thread discusses various freeware and commercial cloning tools:
http://forum.hddguru.com/the-best-disk-cloning-hardware...


Thanks
But I'm not familiar with Linux apps. Could you recommend other applications? I don't care if they are commercial or free.
Can "Acronis True Image WD Edition" or "Unstoppable Copier" be helpful as dd_rescue?
a c 326 G Storage
August 12, 2011 8:31:35 PM

I don't know anything about "Unstoppable Copier", but ISTM that it relies on being able to mount the filesystem. It doesn't appear to work down to the raw sector level.

I suspect that "Acronis True Image" would also have difficulty handling bad sectors. I believe it expects the file system to be undamaged.

Here is a commercial product that is recommended by data recovery professionals:
http://www.atl-datarecovery.com/data-recovery-products/...
!