Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
April 29th, 2010, 5:46
hi all
i am hoping someone can give me a small idea here.
got the above drive in for recovery, drive clicked and wont id
i replaced heads and the drive shows correct id, model, serial, there was also an issue with the copies of plist but one was good so was able to use that to have 2 good copies for copy 0 and copy1
i started to image drive and within the first couple of 100 thousand blocks drive starts to hang.
i built a head map imaged head 0 and am able to image complete drive in about 10 hours, all godd on this head,
started to image with head 1 and drive starts to hang again after a couple of hunderd thousand blocks.
i did another head swap and the same blocks that wont image with head 1 are not imaging with head the new head also.
the drive is still imaging, however it is extremly slow, has many erros in image and starts to click when it gets stuck, it then moves on and continues to image.
any ideas appreciated.
thank you
April 29th, 2010, 5:49
Happens a lot with these drives.
I'm afraid media damage.
Is there a pattern in the addresses of the bad sectors ?
Dobre
April 29th, 2010, 7:12
Media damage that damage new heads...
April 29th, 2010, 7:45
media damage = end of story
April 29th, 2010, 8:04
It depends... not always !
April 29th, 2010, 8:23
At the very least, do a head map and try to determine if the problems are tied to a single head/surface. If so, focus on the other heads first.
April 29th, 2010, 8:30
He did, Luke.
He imaged head 0 allready and then tried head 1
Its that head thats giving troubles.
Depends on what client wants. Perhaps there's enough to recover from head 0.
Dobre
April 29th, 2010, 10:19
image in skip mode imo. with low timeout for the 1st pass. Then skip mode with higher timeout etc. Then if the head is still ok - let it roll without the skip with a high time out to squeze as much data as u can untill the head finaly dies.
April 29th, 2010, 11:55
These drives like to have hidden media damage; difficult to see without the right tools, and tricks.
April 29th, 2010, 12:08
Alexii wrote:image in skip mode imo. with low timeout for the 1st pass. Then skip mode with higher timeout etc. Then if the head is still ok - let it roll without the skip with a high time out to squeze as much data as u can untill the head finaly dies.
I agree, Had quite a few of these, just need clever imaging. Build your data map and only image required data.
April 29th, 2010, 13:10
Hello crecomp i get similar case some months ago i need like 4 or 5 donnors to complete it!!
Regards
April 29th, 2010, 23:50
thank you for all the answers guys
currently i am iamging with larger jumps and making progress will then cut doen imaging and keep on making passes till complete, seems to be imaging better now as the imaging is moving on so hopefully media damage was only in a portion of the drive.
thx for all ideas and input
April 30th, 2010, 19:38
timeouts can help also
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