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Xref: sserve comp.os.linux:39114 comp.os.386bsd.questions:2509 comp.unix.pc-clone.32bit:2799 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!zaphod.mps.ohio-state.edu!cs.utexas.edu!utnut!torn!nott!hobbit.gandalf.ca!ykhan From: ykhan@gandalf.ca (Yousuf Khan) Subject: Re: IDE vs SCSI and performance Message-ID: <1993May17.190905.3462@gandalf.ca> Organization: Gandalf Data Ltd. References: <1993May13.182917.23510@mav.com> <C72CAw.B47@sugar.NeoSoft.COM> Date: Mon, 17 May 1993 19:09:05 GMT Lines: 26 In <C72CAw.B47@sugar.NeoSoft.COM> 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 don't think that IDEs are available for Amigas yet, are they? IDEs as far back as I can remember were designed with the IBM PC AT ISA bus in mind specifically. Even the XT ISA bus was not part of the scheme. However they did build adapters to make it work on an XT ISA bus, and I think they've even made adapters to make it work on a PS/2 MCA bus now. So who knows maybe its available for the Amigas. >I found that hard to beleive... I suspected that his benchmark was being >messed up by buffering. It's likely buffering. There's not a drive in existence that can transfer at that rate without some kind of hardware or software buffering. People like to point out the _potential_ speed of SCSI hardware, but they all ignore the fact that no SCSI drive even approaches this potential. The potential in an IDE might be lower than a SCSI's potential, but so far they are pretty equal in the real world. Yousuf Khan