Date: Mon, 28 Aug 1995 08:43:32 -0700 From: "Justin T. Gibbs" <gibbs@freefall.FreeBSD.org> To: kelly@fsl.noaa.gov (Sean Kelly) Cc: rashid@haven.ios.com, hackers@freebsd.org Subject: Re: S.O.S -2.1Stable and ASUSP54TP4 Message-ID: <199508281543.IAA09248@freefall.FreeBSD.org> In-Reply-To: Your message of "Mon, 28 Aug 95 09:35:39 MDT." <9508281535.AA27283@emu.fsl.noaa.gov>
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>>>>>> "Justin" == Justin T Gibbs <gibbs@freefall.freebsd.org> writes: > > >> system locks at random times w/o any messages at the console/ > >> log files. > > Justin> It sounds like your Barracuda is overheating. > >How do you know this? It wasn't the lock up symptom at all that led me to this conclusion, but eveything else looked like the drive just decided to turn itself off because it was too hot. >I ask because I feel I got hit by a similar problem with a Wangtek >SCSI DAT drive. After a cool-down period, I can do writes to the >drive for about 10 minutes. Then the system locks up. That 10 >minutes time period gets shorter and shorter as the system stays on. >If I wrap the system in a nice comfy blanket with a few plushy animals >(teddy bears work best), writes work for less than 10 seconds. > >By rearranging the various internal components so the DAT drive isn't >near anything, it works fine. > >My question: what is it about the heat that causes the OS to crash? >Or is it not the OS, but the system as a whole? And what is it about >SCSI tape writes? Other SCSI activity works fine. > >Confused. As I've said in the past, the error handling in our SCSI system needs some serious work. I don't know what it is exactly that makes the system fall over if a target falls off the bus, but I'm sure it can be traced back into the higher level SCSI system. >-- >Sean Kelly >NOAA Forecast Systems Lab, Boulder Colorado USA > >Some people think George is weird, because he has sideburns behind his >ears. I think George is weird, because he has false teeth. With >braces on them. George is a radio announcer, and when he walks under >a bridge... You can't hear him talk. -- Steven Wright -- Justin T. Gibbs =========================================== Software Developer - Walnut Creek CDROM FreeBSD: Turning PCs into workstations ===========================================
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