Return to BSD News archive
Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.mira.net.au!news.netspace.net.au!news.mel.connect.com.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!newsfeed.nacamar.de!uunet!dukat.mark.nfr.com!not-for-mail From: mark@dukat.mark.nfr.com (Mark Sienkiewicz) Newsgroups: comp.unix.bsd.bsdi.misc Subject: Re: Virtual file systems (striping) on BSDI 3.0x86? Date: 26 May 1997 23:43:11 -0400 Organization: A poorly-installed InterNetNews site Lines: 37 Message-ID: <5mdl8f$8tm@dukat.mark.nfr.com> References: <Pine.LNX.3.96.970526212551.4551A-100000@rage.hostile.net> NNTP-Posting-Host: dukat.mark.nfr.com Xref: euryale.cc.adfa.oz.au comp.unix.bsd.bsdi.misc:6913 >> >Here is the dmesg info on my drives ... >> >sd0 at tg0 unit 0: disk: SEAGATE ST15230N rev 0298 (SCSI-2) 8386733*512 >> >All of the drives are inside the computer. >> >> Terry Kennedy knows way more than I do about drives, but these >> sound like Barracudas or similar. Many of the fast Seagate drives >> are extremely heat-sensitive and need big cooling fans aimed directly >> at them, or at least a lot of airflow over them. If your case happens >> to have a `dead' spot in its airflow, and sd0 is in that dead spot, >> that would explain why sd0 keeps failing. > >The machine is in a tempature controled room, I can't remeber what the >temp is in the room. I don't have a case on the machine since there >are so many drives in it. > >There could be an airflow problem, but the sd0 drive is not too hot, when >I touch it. sd4 is extermly hot to the touch. The part number for the drive looks like a Barracuda. I had a fan go bad in the enclosure for a Barracuda. It still didn't work in open air in a room cooled to about 60 F. The disk gets hot pretty fast and it eventually malfunctions due to overheating. When it does, the disk starts yanking the signals on the SCSI bus at random times. I was unable to read from my SCSI CDROM when the Barracuda overheated. >I am going to get a fan to blow some air between the drives to see if this >will solve the problem. According to the little booklet that comes with the drives, you need something like 50 cubic feet per minute of airflow directly across the drive. I'd get a couple fans and blow air across all the drives. -- Mark Sienkiewicz Network Flight Recorder, Inc.