Date: Thu, 05 Sep 1996 22:43:52 +0200 From: Torbjorn Granlund <tege@matematik.su.se> To: Stefan Esser <se@zpr.uni-koeln.de> Cc: Sean Eric Fagan <sef@kithrup.com>, bde@zeta.org.au, hackers@freebsd.org Subject: Re: forwarded Message-ID: <199609052043.WAA20334@insanus.matematik.su.se> In-Reply-To: Your message of "Thu, 05 Sep 1996 21:53:32 %2B0200." <199609051953.VAA01686@x14.mi.uni-koeln.de>
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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. 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.) But if your cable is not exactly up to the requirements of the spec, I'd be careful not to go beyond half that length. I don't. 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. Torbjorn
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