Date: Tue, 30 Jan 2001 11:40:37 +0100 (CET) From: Harti Brandt <brandt@fokus.gmd.de> To: Peter Wemm <peter@netplex.com.au> Cc: Mark Huizer <freebsd@dohd.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: Clustering FreeBSD Message-ID: <Pine.BSF.4.21.0101301138190.390-100000@beagle.fokus.gmd.de> In-Reply-To: <200101301026.f0UAQJ463985@mobile.wemm.org>
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On Tue, 30 Jan 2001, Peter Wemm wrote: PW>Mark Huizer wrote: PW>> > | PW>> > | Doh! I mean 9.8 m/s/s, of course. PW>> > PW>> > That's acceleration not velocity :-) PW>> > PW>> > The terminal velocity of a PC case is probably a lot lower than the PW>> > velocity of an outer edge of a 10000 RPM drive. PW>> > PW>> What am I doing wrong? Given a diameter of appr. 7cm, I'd come at appr PW>> 0.7Mach. Does that mean that within a few years my machine will go PW>> KABOOM when booting? PW> PW>I have a 15K rpm drive if you want to do a recalculation. I think that PW>is 1.05Mach, depending on whether you rounded or not. ;-) Well, 7cm gives 21cm per rotation or 2.1km for 10000 rotations. 10000 Rotations Per Minute give around 130km per hour which is somewhere around 0.1MACH. So I expect not problems until the drives reach 50000 rpm :-) harti -- harti brandt, http://www.fokus.gmd.de/research/cc/cats/employees/hartmut.brandt/private brandt@fokus.gmd.de, harti@begemot.org, lhbrandt@mail.ru To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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