Date: Tue, 26 Aug 1997 11:47:35 -0700 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@MindBender.serv.net> To: Ollivier Robert <roberto@keltia.freenix.fr> Cc: current@freebsd.org Subject: Re: IDE vs SCSI was: flags 80ff works (like anybody doubted it) Message-ID: <199708261847.LAA23189@MindBender.serv.net> In-Reply-To: Your message of Tue, 26 Aug 97 08:27:26 %2B0200. <19970826082726.17963@keltia.freenix.fr>
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>According to Jordan K. Hubbard:
>> Hmmm. If we're going to talk SCSI perf, let's get seriously SCSI here
>> then: Quantum XP39100W drive on 2940UW controller:
>> root@time-> dd if=/dev/rsd0 of=/dev/null count=1600 bs=64k
>> 1600+0 records in
>> 1600+0 records out
>> 104857600 bytes transferred in 10.974902 secs (9554309 bytes/sec)
>Aren't you disappointed ? You're only a mere 2 MB/s faster with a Wide
>connection... I'd expect it more in the 14 MB/s range, no ?
With a single drive?! I'd think not... I don't believe even a single
Cheetah is capable of giving a sustained transfer rate of 14MB/s.
Now, with striped drives, accessing the raw striped partition, yes,
I'd expect it to really cruse. And, incidently, that is where SCSI
really starts to break away from IDE in performance.
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Michael L. VanLoon michaelv@MindBender.serv.net
--< Free your mind and your machine -- NetBSD free un*x >--
NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
NetBSD ports in progress: PICA, others...
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