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SCSI DRIVE HARDWARE ERROR

Posted on 1998-07-03
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Last Modified: 2010-04-27
I have a SCSI drive that failed and I am attempting to recover data.  I was successful for most of it, but now I get a SCSI hardware error and cannot access the drive at all.  I replaced the controller card on the drive with one from an identical quantum drive and still have the same error - sense code 04 (hardware error)  sense code qualifiers 09/85.
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Question by:digiwise
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jhance earned 200 total points
ID: 1136854
Assuming that you are confident that the problem is not in the SCSI adapter in your PC or the SCSI cable, the only thing you have left is the small amount of cicuitry on the drive head assembly (amplifiers and receivers) and the spindle motor drive and index sense circuit.  The problem with this stuff is that it's usually on the inside of the drive and cannot be access without cracking open the drive.  If the data is critical, there are outside services (like Ontrack and others) who will recover it for a hefty fee.  If not, I've gone so far as to disassemble the drive, change the ordering of the disk platters (I had a drive with a failed R/W head) and then put it back together and read the data off.  There's no guarantee that it will work but since it's trashed anyway, what's to lose?  If you've got another identical drive that you're willing to sacrifice, you can probably even swap the whole head assy. or the drive platters to the other unit and see if it works.  Once you open the clean enclosure, however, there's a high probablity of failure after a short period of time.  In my experience, "short" is on the order of weeks but I have one drive here that I performed surgery on and it's been working for years!  Your mileage may vary.
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by:digiwise
ID: 1136855
I should add...  the drive is under warranty so I am trying to recover data without voiding the warranty (and opening the drive generally voids the warranty).  Also I have used data recovery services in the past but I am trying to avoid sending my disk out of the building (security headaches).
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