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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.cc.nctu.edu.tw!spring.edu.tw!howland.erols.net!cam-news-hub1.bbnplanet.com!cpk-news-hub1.bbnplanet.com!www.nntp.primenet.com!nntp.primenet.com!mr.net!news.clark.net!usenet From: blckshaw@clark.net (Robert Blackshaw) Newsgroups: comp.unix.bsd.netbsd.misc,comp.sys.sun.hardware Subject: Re: 3/60 SCSI Problem Date: Sat, 12 Oct 1996 21:20:02 GMT Organization: Clark Internet Services, Inc. Lines: 50 Message-ID: <53p2mq$n2o@clarknet.clark.net> References: <Pine.NEB.3.93.961010144943.21595B-100000@kefron.portal.ca> <Dz4sBG.2IF@yedi.iaf.nl> NNTP-Posting-Host: blckshaw.clark.net Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: Forte Free Agent 1.0.82 Xref: euryale.cc.adfa.oz.au comp.unix.bsd.netbsd.misc:4739 comp.sys.sun.hardware:40256 wilko@yedi.iaf.nl (Wilko Bulte) wrote: >Ari Rubenstein <arubenst@kefron.portal.ca> writes: >>Hi, >>I recently acquired a 3/60, and am running NetBSD/sun3 1.2 on it. >>After a few hours running flawlessly, the computer will invariably ditch >>me to the debugger with the following error. >>si: DMA timeout (while polling) >>panic: ncr5380_scsi_cmd: polled request, abort failed >>Stopped at _Debugger+0x6: unlk a6 >>db> >>Another 3/60 at work used to have the same error, but upgrading to >>NetBSD 1.2 seemd to fix it. What it going on here? Tell me this is >>software related, as I'd rather not have to find parts for the beast... >>Also, it seems to be related to how long the computer has been physically >>on (as opposed to how long since last reboot). The bottom of the case >>feels quite hot. Could this error be the result of a flaked-out fan, >>power supply, etc. causing the SCSI controller to overheat? >The 3/60 has a fan at the _bottom_ of the power supply. It has a >sort of wire mesh (is that the right term?) over it to protect peoples >fingers. After some time this fan becomes clogged with dirt/dust/whatever. >Take the plastic top off, pull of the metal EMC shield and you look right >into the power supply. Get a vacuum cleaner and a small brush. Get the >debris out. This really helps to keep 'm cool and well. >(DO unplug the mains power if you don't want to be electrocuted by the >switching power supply) >Wilko I can attest to that. When I got my 3/60 the first thing I did was clean out the pizza box power supply + fan and the SCSI tower fans. SUN has some funny ideas, in the tower they even put screening on the inside of the fans. While I was inside the pizza box I also replaced the el-cheapo fan with a good Pabst unit. Bob Opinions expressed are those of the author. Computers and Laser Printers recycled, for fun and for profit.