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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.wildstar.net!serv.hinet.net!news.uoregon.edu!hammer.uoregon.edu!csulb.edu!data.ramona.vix.com!sonysjc!sonybc!newsjunkie.ans.net!newsfeeds.ans.net!prodigy.com!darkstar.prodigy.com!davidsen From: davidsen@tmr.com (bill davidsen) Newsgroups: comp.os.linux.misc,comp.os.linux.networking,comp.os.linux.setup,comp.unix.bsd.bsdi.misc,comp.unix.bsd.misc Subject: Re: IDE vs SCSI (was Re: Linux vs BSD) Date: 29 Jan 1997 21:53:18 GMT Organization: TMR Associates, Schenectady NY Lines: 27 Message-ID: <5cogse$3ldq@usenet1y.prodigy.net> References: <32DFFEAB.7704@usa.net> <5c3k6o$qro@lynx.dac.neu.edu> <873evtxn6t.fsf@localhost.xs4all.nl> <87k9p4rckd.fsf_-_@murkwood.gaffaneys.com> NNTP-Posting-Host: darkstar.prodigy.com Originator: davidsen@darkstar.prodigy.com Xref: euryale.cc.adfa.oz.au comp.os.linux.misc:155035 comp.os.linux.networking:66582 comp.os.linux.setup:94524 comp.unix.bsd.bsdi.misc:5792 comp.unix.bsd.misc:2118 In article <87k9p4rckd.fsf_-_@murkwood.gaffaneys.com>, Zach Heilig <zach@blizzard.gaffaneys.com> wrote: | Probably little disagreement here, except among the clueless :-) This | is my explanation why IDE will always be slower than SCSI (and why | SCSI is usually more expensive). | | Peter Mutsaers <plm@xs4all.nl> writes: | | > Todays IDE drives are not much slower than SCSI drives | | [snipped] | | There probably aren't any performance differences between IDE and SCSI | hardware. The differences come in when you compare the interfaces | themselves. The limiting factor is the speed of the bits coming off the platter for a single drive. The interface can keep up with that, even on a 8 bit card with programmed i/o. Sustained i/o, at any rate, cache here and there makes it meaningless to measure anything else. As you say, the drives are the same. -- bill davidsen (davidsen@tmr.com) Windows NT is like a doctoral thesis; it contains a wealth of interesting features and ideas, some of which could be extracted from the proof of concept and used in a real operating system.