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Article #39Re: SCSI (was Re: IPI-2 questions)
From: Bernd Felsche
Date: Sun, 26 Jul 1992 05:24
Date: Sun, 26 Jul 1992 05:24
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1690 bytes
In <AJC.92Jul24120000@thendara.pa.dec.com> ajc@pa.dec.com (AJ Casamento) writes: > The size of the transfer is started at 8bit, but can go to either 16bit or >to 32bit. This would mean that the architectural limit in the current spec >for Fast Very-Wide (ie. 32bit) Differential SCSI-2 would be 40MB/s. As I read >the current spec the use of 16bit requires two SCSI cables to be used. So, it >would seem possible (and the spec states it is) to mix 8bit and 16bit devices >on the same bus using a Host Adapter that was capable of handling 16bit. How do you prevent two devices responding to the same low 8-bits of address? i.e. devices 4 and 12. The high bit is only visible on the 16bit bus. Is there some magic which differentiates between 8 and 16bit addresses, which is visible in the 8bit space? -- +-----+ Bernd Felsche _--_|\ #include <std/disclaimer.h> | | | | MetaPro Systems Pty Ltd / \ bernie@metapro.DIALix.oz.au | | | | 328 Albany Highway, X_.--._/ Fax: +61 9 472 3337 |m|p|s| Victoria Park, Western Australia 6100 v Phone: +61 9 362 9355
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Newsgroups: comp.arch.storage Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!uniwa!DIALix!metapro!bernie From: bernie@metapro.DIALix.oz.au (Bernd Felsche) Subject: Re: SCSI (was Re: IPI-2 questions) Message-ID: <1992Jul26.052449.18091@metapro.DIALix.oz.au> Organization: MetaPro Systems, Perth, Western Australia References: <BrCG6x.Jpp@acsu.buffalo.edu> <ADAMS.92Jul16014945@PDV2.pdv2.fmr.maschinenbau.th-darmstadt.de> <BrH2sz.5qM@csn.org> <22020@venera.isi.edu> <AJC.92Jul24120000@thendara.pa.dec.com> Date: Sun, 26 Jul 92 05:24:49 GMT Lines: 22