Date: Mon, 14 Oct 1996 15:34:48 -0700 (PDT) From: Dave Babler <dbabler@Rigel.orionsys.com> To: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> Cc: freebsd-hardware@freebsd.org Subject: Re: sticky drives (was: your mail) Message-ID: <Pine.BSI.3.95.961014151833.18097A-100000@Rigel.orionsys.com> In-Reply-To: <199610142113.OAA14453@GndRsh.aac.dev.com>
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On Mon, 14 Oct 1996, Rodney W. Grimes wrote: > > This is extremely dangerous, BTW. When you take the drive out of the > > freezer, condensation may form on the platters as the drive heats up. > > Conversely, frost may form on the platters as the drive drops below freezing. > > This is absolutely true, dropping a drive below 0 deg C is a sure fire > way to damage it. Even the non-operating temp spec on almost all mfg's > disk is +5 C on the lower end. Having done MIL-SPEC drive work that > had to operate over -55 to +125 C the actual hardest part of this range > was the -5 to +5 C range, condensation being a real killer. Isn't the chamber where the platters reside hermetically sealed? If so, how would moisture be there to condense in the first place? -Dave
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