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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!news.ececs.uc.edu!newsxfer.itd.umich.edu!newsxfer3.itd.umich.edu!howland.erols.net!newsfeed.internetmci.com!news.corpcomm.net!news From: Zach Heilig <zach@blizzard.gaffaneys.com> Newsgroups: comp.os.linux.misc,comp.os.linux.setup,comp.unix.bsd.bsdi.misc,comp.unix.bsd.misc Subject: Re: IDE vs SCSI (was Re: Linux vs BSD) Date: 24 Jan 1997 06:09:20 -0600 Organization: Corporate Communications Lines: 25 Sender: zach@murkwood.gaffaneys.com Message-ID: <87g1zrb7gv.fsf@murkwood.gaffaneys.com> References: <32DFFEAB.7704@usa.net> <87k9p4rckd.fsf_-_@murkwood.gaffaneys.com> <5c8a39$7tn@usenet.srv.cis.pitt.edu> <5c8odp$14q@ravel.cs.colostate.edu> <5c97cd$f6h@cynic.portal.ca> NNTP-Posting-Host: dialup9.gaffaneys.com Mime-Version: 1.0 (generated by tm-edit 7.89) Content-Type: text/plain; charset=US-ASCII X-Newsreader: Gnus v5.3/Emacs 19.34 Xref: euryale.cc.adfa.oz.au comp.os.linux.misc:153974 comp.os.linux.setup:93675 comp.unix.bsd.bsdi.misc:5713 comp.unix.bsd.misc:2005 cjs@cynic.portal.ca (Curt Sampson) writes: > In article <5c8odp$14q@ravel.cs.colostate.edu>, > Larry Pyeatt <pyeatt@.cs.colostate.edu> wrote: > >While a modern SCSI system can sustain > 16MB/s and my 5 year old > >SCSI controller and drives can sustain > 8MB/s > Which SCSI drive do you have that sustains 16 MB/sec, and how did you > benchmark this? More than likely, he had 4 or 5 disks on the same controller, with some sort of concatenated filesystem (FreeBSD does this). These sorts of figures are sustainable when you spread the work over among many drives. My single fast scsi-2 drive can sustain 2meg/sec with reading / writing large files (80 Meg or so), and assuming each new drive could add 75% of the performance the previous drive added, 7 such drives could sustain 7Meg/sec believably. -- Zach Heilig (zach@blizzard.gaffaneys.com) | ALL unsolicited commercial email Support bacteria -- it's the only | is unwelcome. I avoid dealing form of culture some people have! | with companies that email ads.