Date: Thu, 8 Oct 1998 12:45:31 -0400 (EDT) From: "Matthew N. Dodd" <winter@jurai.net> To: sthaug@nethelp.no Cc: tlambert@primenet.com, petrilli@amber.org, freebsd-smp@FreeBSD.ORG Subject: Re: hw platform Q - what's a good smp choice these days? Message-ID: <Pine.BSF.4.02.9810081240490.16487-100000@sasami.jurai.net> In-Reply-To: <28895.907827297@verdi.nethelp.no>
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On Thu, 8 Oct 1998 sthaug@nethelp.no wrote: > For sustained rate (sequential read, one process), I can read data faster > off an IBM 16 GB 5400 RPM drive than a 9 GB 7200 RPM Barracuda (this is > not the LP model). This is of course just one data point, but I've seen > the same in a number of other comparisons using sequential reads. Umm... How is it surprising that a disk with a higher data density has faster sustained transfer rate? Consider that the drive has nearly two times as many bits per inch and travels at 75% of the speed of the other drive. Grab a 4gig Quantum Bigfoot and read the outermost track and see what kind of insane sustained rate you get off of that. :) Besides, your IBM is fairly new while the Seagate is at least 3 or 4 years old. -- | Matthew N. Dodd | 78 280Z | 75 164E | 84 245DL | FreeBSD/NetBSD/Sprite/VMS | | winter@jurai.net | This Space For Rent | ix86,sparc,m68k,pmax,vax | | http://www.jurai.net/~winter | Are you k-rad elite enough for my webpage? | To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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