Hi Arik.
I don't know if the list of bad blocks is stored on the media itself or on
memory on the drive's PCB. If the latter is the case, then you will run into
recovery issues as the drive's OS assumes the bad blocks of the previous
drive. Is that supposed to crash your system? I don't know.
Can you try changing the interface? For example, are you able to use a USB
interface instead of plugging in the drive directly to the motherboard? That
would be less likely to bring down your system. Yes, it's much slower. But at
least you can continue where you left off.
Good Luck.
Andrew Zajac
--- On Sat, 1/9/10, Arik Raffael Funke <[email protected]> wrote:
From: Arik Raffael Funke <[email protected]>
Subject: [Bug-ddrescue] ddrescue crashes system on kernel 2.6.18
To: [email protected]
Received: Saturday, January 9, 2010, 3:29 PM
Hi,
Background: I have had a power supply unit failure and as a result the PCBs of
three hard drives were fried as well as the processor.
I have replaced the PCB from an identical drive for the data drive, a
WD200EB-00CSF0. The harddrive is seems to work fine for almost all files: It
can be mounted, data is generally accessible, etc.
When I try to image the drive with ddrescue, it proceeds without errors within
20 minutes to 16.5Gb/20Gb where it encounters the first errors. It then takes
approximately another 5-10 minutes apparently only getting errors before
finally crashing the whole system.
A photograph of the screen can be seen here: (Sorry for the flash...)
http://img64.imageshack.us/img64/745/crasho.jpg
The result is the same with:
ddrescue -n
ddrescue --direct
ddrescue --raw
All attempts were made in runlevel 1 on a Centos 5.4 system with kernel 2.8.18.
Resuming recovery with the log file makes the system crash shortly after
resuming.
Can anybody tell me how to either:
- read out a complete image (obviously without the presumably bad sectors) so
that I can run file system recovery? The image now is truncated.
- fix the hard drive problem? (I.e. why should the hard drive have bad sectors
in the last few GB given a mere power surge?)
Many thanks for any help!
- Arik
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