Date: Thu, 5 Sep 1996 22:59:04 +0200 (MET DST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: se@zpr.uni-koeln.de (Stefan Esser) Cc: tege@matematik.su.se, sef@kithrup.com, bde@zeta.org.au, hackers@freebsd.org Subject: Re: forwarded Message-ID: <199609052059.WAA19227@yedi.iaf.nl> In-Reply-To: <199609051953.VAA01686@x14.mi.uni-koeln.de> from "Stefan Esser" at Sep 5, 96 09:53:32 pm
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As Stefan Esser wrote... > Torbjorn Granlund writes: > > For completeness, here is my system setup: > > > > ASUS P/I-P55TP4N (P167, 512KB burst cache, 64MB EDO DRAM) > > Adaptec 2940UW PCI > > Fujitsu 2954SAU 4.4GB (8-bit Ultra enabled) > > HP35480A DAT (Fast SCSI) > > Toshiba XM-3701TA CD-ROM (Fast SCSI) (last device, terminated) > > Hmmm, what's the length of the SCSI cable ? > What quality is it ? > > I assume you know, that Ultra-SCSI tolerates at > most 1.5 (5ft.) of high-quality cable, total. > 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. > > 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. At work Ultra SCSI is currently in qualification. Especially things like stub length on (older) devices can cause problems. I'd suggest to put the Fujitsu on a short bus, and on it's own. Wilko _ ____________________________________________________________________ | / o / / _ Wilko Bulte email: wilko@yedi.iaf.nl |/|/ / / /( (_) Private FreeBSD site - Arnhem - The Netherlands --------------------------------------------------------------------------
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