Date: Sat, 24 May 1997 13:07:23 +0200 (MEST) From: Søren Schmidt <sos@sos.freebsd.dk> To: bde@zeta.org.au (Bruce Evans) Cc: hackers@FreeBSD.ORG, j@uriah.heep.sax.de Subject: Re: Controler for SCSI Message-ID: <199705241107.NAA00317@sos.freebsd.dk> In-Reply-To: <199705241036.UAA02991@godzilla.zeta.org.au> from Bruce Evans at "May 24, 97 08:36:00 pm"
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In reply to Bruce Evans who wrote:
> >> 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.
While we are on the subject: I just bought two Maxtor 84000 (4gig) drives
and I plan to play a little with DMA for those (they only do 16.6MB/sec)
They are pretty fast btw, faster than my Empire and SureStore SCSI2
disks, I'm surprised they even use less CPU than my SCSI setup (above
drives and NCR ctrl), not bad at all and CHEAP!!.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt (sos@FreeBSD.org) FreeBSD Core Team
Even more code to hack -- will it ever end
..
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