Date: Thu, 7 Aug 1997 23:22:25 -0700 (PDT) From: Tom <tom@uniserve.com> To: Atipa <freebsd@atipa.com> Cc: "John S. Dyson" <toor@dyson.iquest.net>, dyson@FreeBSD.ORG, ggm@connect.com.au, current@FreeBSD.ORG Subject: Re: IDE vs SCSI was: flags 80ff works (like anybody doubted it) Message-ID: <Pine.BSF.3.96.970807231807.25546B-100000@shell.uniserve.com> In-Reply-To: <Pine.BSF.3.91.970807225059.4717A-100000@dot.ishiboo.com>
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On Thu, 7 Aug 1997, Atipa wrote: > My thoughts exactly. Depending on the card and driver level, SCSI is > actually slower in many cases. Similar IDE drives outperformed SCSIs Many cases? Only in command overhead. ... > > This is the result of my Hawk, SCSI drive, with an NCR 815 interface: > > > > Command overhead is 845 usec (time_4096 = 2071, time_8192 = 3297) > > transfer speed is 3.34201e+06 bytes/sec > > > > dd if=/dev/rsd0 of=/dev/null count=1600 bs=64k > > 1600+0 records in > > 1600+0 records out > > 104857600 bytes transferred in 27.336979 secs (3835742 bytes/sec) Hehe, I can do the above dd at 8738133 bytes/sec, on a NCR 810 (narrow!), with a Seagate Barracuda. Try to find a IDE drive that can do that. This is only a P120. Tom
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