Date: Tue, 30 Jan 2001 21:29:20 +1000 From: Andrew Kenneth Milton <akm@mail.theinternet.com.au> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: thomas@hentschel.net, Peter Wemm <peter@netplex.com.au>, Mark Huizer <freebsd@dohd.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: Clustering FreeBSD Message-ID: <20010130212920.O11513@zeus.theinternet.com.au> In-Reply-To: <30257.980853025@critter>; from Poul-Henning Kamp on Tue, Jan 30, 2001 at 12:10:25PM %2B0100 References: <200101301103.f0UB3f144218@falcon.home.hentschel.net> <30257.980853025@critter>
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+-------[ Poul-Henning Kamp ]---------------------- | In message <200101301103.f0UB3f144218@falcon.home.hentschel.net>, thomas@hentschel.net writes: | | >>> What am I doing wrong? Given a diameter of appr. 7cm, I'd come at appr | >>> 0.7Mach. Does that mean that within a few years my machine will go | >>> KABOOM when booting? | >> | >> I have a 15K rpm drive if you want to do a recalculation. I think that | >> is 1.05Mach, depending on whether you rounded or not. ;-) | > | >Hang on, there's a bug here somewhere: | > | >7cm = .07m, | >.07m x 3.14... = .22m (per rotation) | >.22m *15000/60 = 55m/s or ~ 195km/h or 123 mph, not even close to a fast car. | > | >We should expect breaking the sound barrier with >75krpm drives | >(depending on your altitude and air pressure) | | That is overlooking that the air rotates in mostly laminar fashion with | the platters, isn't it ? That depends on whether they're African or European drives.. -- Totally Holistic Enterprises Internet| P:+61 7 3870 0066 | Andrew Milton The Internet (Aust) Pty Ltd | F:+61 7 3870 4477 | ACN: 082 081 472 ABN: 83 082 081 472 | M:+61 416 022 411 | Carpe Daemon PO Box 837 Indooroopilly QLD 4068 |akm@theinternet.com.au| To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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