Date: Sat, 24 May 1997 15:25:31 +0200 (MEST) From: Søren Schmidt <sos@sos.freebsd.dk> To: sthaug@nethelp.no Cc: shag@concentric.net, hackers@FreeBSD.ORG Subject: Re: Controler for SCSI Message-ID: <199705241325.PAA00586@sos.freebsd.dk> In-Reply-To: <25678.864473956@verdi.nethelp.no> from "sthaug@nethelp.no" at "May 24, 97 01:39:16 pm"
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In reply to sthaug@nethelp.no who wrote:
> > > 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.
> >
> > Now if only it worked that way In Real Life... :-) I have a pretty
> > decent Fijitsu drive, and my Quantum Lightning, which is among the worse
> > SCSI-II drives manufactered in the last couple of years, takes it to
> > town on every benchmark on the planet. I know the controller is crap,
> > but it was cheap, and I was just hoping. =)
>
> I have to disagree. I have a PPro-200 with a 1.7 GB Quantum FB, PIO mode.
> I get a sustained 6.8 MB/s on sequential read from this, while my Seagate
> Barracuda "only" gets around 6 MB/s.
So do I with my new Maxtor 84000A disks...
> The price differential between SCSI and EIDE is significant enough these
> days that I think it's vital for FreeBSD to get EIDE DMA support.
Endeed, I plan to work on it (when I have some spare time, which is rare
these days)...
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt (sos@FreeBSD.org) FreeBSD Core Team
Even more code to hack -- will it ever end
..
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