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Newsgroups: comp.unix.bsd.freebsd.misc Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.mira.net.au!inquo!news.uoregon.edu!symiserver2.symantec.com!news.central.com!news From: tedm%toybox@agora.rdrop.com Subject: Re: Is this SCSI problem my drives or my BusLogic 946C ? X-Newsreader: IBM NewsReader/2 v1.2 Reply-To: tedm%toybox@agora.rdrop.com Sender: news@news.central.com (Usenet Netnews) Organization: Beaverton Location, Peter Norton Group Message-ID: <DLurI6.7rt@news.central.com> References: <4dv17n$269@venus.os.com> <4e3s3n$6th@uriah.heep.sax.de> Date: Sat, 27 Jan 1996 18:32:29 GMT Lines: 30 In <4e3s3n$6th@uriah.heep.sax.de>, j@uriah.heep.sax.de (J Wunsch) writes: >craigs@os.com (Craig Shrimpton) writes: > >> I just had a weird SCSI incident that shut down my news server. The [deleted] >This is either a bad disk, or some cabling or power supply problem. >I've also seen problems where a drive attempted to feed term power to >the SCSI bus, and the SCSI adaptor, too. Removing the `term power' >jumper solved this problem. Actually, Digital Equipment in their drive documentation states that _all_ SCSI devices that can be should be jumpered to _supply_ terminator power to the SCSI termination power bus. I don't subscribe to this, however, as I have seen many strange things happen when attempting to do this. I think that what they were meaning is that devices that supply termination power, should do so FOR THEIR OWN TERMINATORS, and NOT to line 26 (the terminator power line). So, you can see even the drive manufacturers don't get it right all the time. ;-) The way I have always set stuff up was to have all devices _obtain_ termination power from the SCSI bus, and the adapter card to _suppy_ termination power, that way the terminators are running at the same voltage level as the signal lines. Ted Mittelstaedt tedm%toybox@agora.rdrop.com