Date: Sat, 24 May 1997 10:56:12 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: bde@zeta.org.au (Bruce Evans) Cc: hackers@FreeBSD.ORG, j@uriah.heep.sax.de Subject: Re: Controler for SCSI Message-ID: <199705241756.KAA11028@phaeton.artisoft.com> In-Reply-To: <199705241036.UAA02991@godzilla.zeta.org.au> from "Bruce Evans" at May 24, 97 08:36:00 pm
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> >> Funny, the 2920 is listed in the docs somewhere as not supported <the > >> only Adaptec so specified>. > >... > >The EIDE is about the same as what you could get with the Future > >Domain; both are PIO only. > > Nope, EIDE supports PIO mode 4 (16.6MB/sec) and DMA at about the same > speed. 16.6MB/sec is standard for PCI EIDE controllers. Crufty SCSI > PIO controllers are unlikely to be as fast. New Quantum EIDE drives > support DMA at 33.3MB/sec. Except while doing PIO, your CPU is neglecting the number crunching it is supposed to be doing instead. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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