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Xref: sserve comp.os.linux:39704 comp.os.386bsd.questions:2591 comp.unix.pc-clone.32bit:2899 Newsgroups: comp.os.linux,comp.os.386bsd.questions,comp.unix.pc-clone.32bit Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!agate!howland.reston.ans.net!noc.near.net!uunet!leviticus!richk From: richk@grebyn.com (Richard Krehbiel) Subject: Re: IDE vs SCSI and performance In-Reply-To: newton@cleese.apana.org.au's message of 19 May 1993 09:36:27 +0930 Message-ID: <C7CpK2.Gn2@grebyn.com> Lines: 22 Sender: richk@grebyn.com (Richard Krehbiel) Organization: Grebyn Timesharing, Inc. References: <C72CAw.B47@sugar.NeoSoft.COM> <1tbtmk$a0b@cleese.apana.org.au> Date: Thu, 20 May 1993 06:51:12 GMT In article <1tbtmk$a0b@cleese.apana.org.au> newton@cleese.apana.org.au (Mark Newton) writes: > peter@NeoSoft.com (Peter da Silva) writes: > > I was talking to a fellow in a computer store the other day, and he was > > insisting that he was getting 2.5 MB/s on his IDE drives under AmigaOS, > > over twice what he got with SCSI. > > I found that hard to beleive... I suspected that his benchmark was being > > messed up by buffering. > > Amiga benchmarking programs typically bypass the filesystem and > manipulate the raw disk device to do their speed tests. They also > disable multitasking. The most popular Amiga disk benchmark (DiskPerf) takes great pride in going *through* the file system. And it can't disable multi-tasking, because the file system and device driver code are separate tasks; if you disable multitasking, it wouldn't run. > In any case, the results obtained from benchmarks usually have no bearing > on the machine's real-life performance. Always true. -- Richard Krehbiel richk@grebyn.com OS/2 2.0 will do for me until AmigaDOS for the 386 comes along...