Date: Sat, 23 Nov 1996 14:21:52 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: joelh@gnu.ai.mit.edu (Joel Ray Holveck) Cc: grog@lemis.de, terry@lambert.org, chat@FreeBSD.org Subject: Re: ATAPI (was: Who needs Perl? We do!) Message-ID: <199611232121.OAA19464@phaeton.artisoft.com> In-Reply-To: <199611231856.NAA03954@hill.gnu.ai.mit.edu> from "Joel Ray Holveck" at Nov 23, 96 01:56:27 pm
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> What are these A/V drives I see nowdays? Are these just > standard-issue SCSI drives trying to get on the 'multimedia' > bandwagon, or is there really something else to them? They are standard drives which do not have an off cycl;e for thermal recalibration. This makes them faster to dump an incoming stream of "A/V" data and turn around for more data, but it makes them much more sensitive to thermal variance. If you have a machine you leave on all the time, and you scsiformat after it has reached thermal equilibrium, and never remount after a crash until it is, again, at thermal equilibrium, and you maintain a standard thermal profile with consistent ventilation to a controlled environment in which the machine is placed, you can use them all day with no difference, except they are slightly faster over a bursty short haul. If you don't do any of these things, they are slightly faster over a bursty short haul, but they have a *significantly* decreased MTBF. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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