Date: Fri, 6 Sep 1996 18:46:59 +0200 (MET DST) From: Stefan Esser <se@zpr.uni-koeln.de> To: Torbjorn Granlund <tege@matematik.su.se> Cc: Stefan Esser <se@zpr.uni-koeln.de>, Sean Eric Fagan <sef@kithrup.com>, bde@zeta.org.au, hackers@FreeBSD.org Subject: Re: forwarded Message-ID: <199609061646.SAA16609@x14.mi.uni-koeln.de> In-Reply-To: <199609052043.WAA20334@insanus.matematik.su.se> References: <199609051953.VAA01686@x14.mi.uni-koeln.de> <199609052043.WAA20334@insanus.matematik.su.se>
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Torbjorn Granlund writes: > Hmmm, what's the length of the SCSI cable ? What quality is it ? > > I don't know if the quality is OK, but it is surely not more than 0.75 > metres. Well, this should be short enough ... > I assume you know, that Ultra-SCSI tolerates at most 1.5 (5ft.) of > high-quality cable, total. > > According to the Ultra docs I have, up to 6 metres should be OK. (3 metres > if there are any non-ultra devices on the bus.) The numbers I know are max. 3m with at most 4 devices (incl. controller) on the SCSI bus, 1.5m else. > Another (IMHO) open question is, whether FAST SCSI devices (like your DAT > and CDROM) may be on a SCSI bus using 20MHz transfer rates. I'd be careful > because of a perhaps too high load, and because they might become confused > because of the too short strobes. > > Possible, but the other devices were idle when the disk corruption took > place. This wouldn't make a difference. I've seen it happen ... Regards, STefan
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