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Date: Thu, 2 Jan 1997 18:24:50 +0100 (MET)
From: Christoph Kukulies <kuku@gilberto.physik.rwth-aachen.de>
Message-Id: <199701021724.SAA15524@gilberto.physik.rwth-aachen.de>
To: freebsd-hackers@freefall.FreeBSD.org
Subject: advice sought - Quantum 2GB Atlas broken
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Coming back from a short holiday I powered on a P90 machine with
(among other IDE disks) a Quantum 2GB ATLAS XP32150 and the SCSI disks
saluted with a continous one second interval clicking noise.
It spins up but the head seems to do some wild moves followed by a
'chuck-clack' with the NCR PCI BIOS not coming to an end of the probing
phase. At least the NCR BIOS sits there for half an hour already 
and that noise is repeating unchanged. 

As always in such situations that disk contained some important data I
would like to preserve.  Despite of this the disk is still under warranty.
So giving it back and waiting 8 weeks for replacement isn't the issue.
It's just the data I wish to recover.

Does anyone have experience with drive electronics swapping?
I have a second disk of that model and I'm tempted to swap the
electronics PCB (after having bought the appropriate hex nut driver 
tomorrow, is that the correct expression :-)

I suspect that the electronics stores some bad block info in some kind
of nvram on the controller board but not sure about this.


--Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de