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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!ns.saard.net!hakea.adelaide.edu.au!news.cs.su.oz.au!metro!metro!munnari.OZ.AU!uunet!in3.uu.net!204.127.130.5!worldnet.att.net!news.maxwell.syr.edu!EU.net!Ireland.EU.net!maths.tcd.ie!maths.tcd.ie!not-for-mail From: ajudge@maths.tcd.ie (Alan Judge) Newsgroups: comp.periphs.scsi,comp.unix.bsd.freebsd.misc Subject: Re: Bizarre SCSI problem (3 disks work, 4 don't) (2940UW/Quantum Atlas II) Date: 4 Feb 1997 16:20:24 -0000 Organization: Dept. of Maths, Trinity College, Dublin, Ireland. Lines: 15 Sender: mathnews@gosset.maths.tcd.ie Message-ID: <5d7nk8$p3h@gosset.maths.tcd.ie> References: <5d7201$qa@gosset.maths.tcd.ie> NNTP-Posting-Host: gosset.maths.tcd.ie Xref: euryale.cc.adfa.oz.au comp.periphs.scsi:69824 comp.unix.bsd.freebsd.misc:35089 ajudge@maths.tcd.ie (Alan Judge) writes: >The 4 disks are numbers 0..3. When *any* three disks are connected to >the ribbon cable, everything works fine; I can access and use the >disks. When all four are connected, the SCSI system fails quite >quickly. Some more testing would indicate that things work fine as long as Ultra SCSI is disabled. Though this setting gives lower performance than 3 disks at Ultra speed. My guess is that something like cable length is on the borderline and simply plugging in the extra load is breaking things. Anyone know for sure? -- Alan Judge Like punning, programming is a play on words. -- Alan Perlis