From owner-freebsd-scsi Thu Jan 2 11:21:28 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id LAA24992 for freebsd-scsi-outgoing; Thu, 2 Jan 1997 11:21:28 -0800 (PST) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.8.4/8.8.4) with SMTP id LAA24979 for ; Thu, 2 Jan 1997 11:21:22 -0800 (PST) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id UAA17178; Thu, 2 Jan 1997 20:21:12 +0100 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id UAA14902; Thu, 2 Jan 1997 20:21:12 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.8.4/8.6.9) id TAA08251; Thu, 2 Jan 1997 19:01:19 +0100 (MET) From: J Wunsch Message-Id: <199701021801.TAA08251@uriah.heep.sax.de> Subject: Re: advice sought - Quantum 2GB Atlas broken To: freebsd-scsi@FreeBSD.org (FreeBSD SCSI list) Date: Thu, 2 Jan 1997 19:01:19 +0100 (MET) Cc: kuku@gilberto.physik.rwth-aachen.de (Christoph Kukulies) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199701021724.SAA15524@gilberto.physik.rwth-aachen.de> from Christoph Kukulies at "Jan 2, 97 06:24:50 pm" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk (Moved to -scsi.) As Christoph Kukulies wrote: > 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. Didn't we (Jordan?) warn you about the XP drives back in those days? :-} > Does anyone have experience with drive electronics swapping? Be careful regarding the warranty. While you could do operations of this kind during the law-enforced 6 month warranty here in Germany, any additional volunteerely warranty is at the mercy of the conditions of whoever grants it. > I suspect that the electronics stores some bad block info in some kind > of nvram on the controller board but not sure about this. Most likely, they are stored on the disk itself. I have successfully swapped drive electronics in the past. That's been on IDE drives, but the working principles of how the drives store bad sector replacement tables should be similar to SCSI. (The drives in question were an old Conner CP3040, and a Seagate ST1144A.) In case the reason for your drive breakage is a damaged detector in the drive mechanics, rather than a broken drive PCB (which is IMHO at least as likely), you might be unlucky nevertheless. In my case, it's been an electrically dead PCB (burnt power supply), and we were indeed able to successfully read the contents of the ST1144A. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)