From owner-freebsd-questions@FreeBSD.ORG Wed Aug 26 20:49:17 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 05851106568E for ; Wed, 26 Aug 2009 20:49:17 +0000 (UTC) (envelope-from jerrymc@gizmo.acns.msu.edu) Received: from gizmo.acns.msu.edu (gizmo.acns.msu.edu [35.8.1.43]) by mx1.freebsd.org (Postfix) with ESMTP id A17A48FC36 for ; Wed, 26 Aug 2009 20:49:16 +0000 (UTC) Received: from gizmo.acns.msu.edu (localhost [127.0.0.1]) by gizmo.acns.msu.edu (8.13.6/8.13.6) with ESMTP id n7QKjexR024704; Wed, 26 Aug 2009 16:45:40 -0400 (EDT) (envelope-from jerrymc@gizmo.acns.msu.edu) Received: (from jerrymc@localhost) by gizmo.acns.msu.edu (8.13.6/8.13.6/Submit) id n7QKjevI024703; Wed, 26 Aug 2009 16:45:40 -0400 (EDT) (envelope-from jerrymc) Date: Wed, 26 Aug 2009 16:45:40 -0400 From: Jerry McAllister To: Roland Smith Message-ID: <20090826204539.GC24590@gizmo.acns.msu.edu> References: <1338880b0908241129p75b6845cg26d21804e118364@mail.gmail.com> <20090824223247.GD43410@slackbox.xs4all.nl> <1338880b0908252246s21191e83k7c251366b706532@mail.gmail.com> <20090826180741.GA23120@slackbox.xs4all.nl> <20090826191348.GA85581@marvin.optimis.net> <20090826202347.GA27093@slackbox.xs4all.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090826202347.GA27093@slackbox.xs4all.nl> User-Agent: Mutt/1.4.2.2i Cc: George Davidovich , freebsd-questions@freebsd.org Subject: Re: hard disk failure - now what? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Aug 2009 20:49:17 -0000 On Wed, Aug 26, 2009 at 10:23:47PM +0200, Roland Smith wrote: > On Wed, Aug 26, 2009 at 12:13:48PM -0700, George Davidovich wrote: > > > > If the drive is that bad, it is doubtfull if dd or ddrescue will be > > > able to get a good copy. > > > > Probably true. I hesitate to suggest this, but sticking the drive in a > > freezer (preferrably in a ziplock bag) for a few hours or overnight > > might help. Stories from people claiming "I swear it works!" go back > > years. > > Interesting. > > > To the exent it does work, it might give Kelly enough time to attempt > > recovery. If more time is required, he can try and find a creative > > workaround for the 5 meter max length for USB cables. Also, > > experimenting with dry ice or acetone baths might prove to be > > interesting, or at least educational. ;-) > > > I remember this special non-condictive 3M fluid that can be used to cool > electronics. A group of hackers dunked a complete PC minus the case and power > supply in this stuff. The fluid itself was cooled with liquid nitrogen. They > everclocked it something wicked. Not very practical though. :-) A number of supercomputers from Cray and Control Data and maybe some other places used this sort of thing on some experimental systems. I don't know if any ever were put in to commercial production. They submerged who boards in to it and then supercooled the fluid. I don't remember the chemical names. The fluid was a relative of Freon and held sufficient levels of oxygen to support lung breathers. They used to have a tank with a live mouse submerged in it bouncing around and seeming to have no trouble not choking or drowning. A variation of it was also researched as a blood substitute for some special medical needs. I don't know how far that went. I know it is not all fantasy because I saw the live mouse. I didn't try the blood substitute. ////jerry > > Roland > -- > R.F.Smith http://www.xs4all.nl/~rsmith/ > [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] > pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725)