Date: Tue, 24 Feb 1998 17:09:49 -0500 (EST) From: "John S. Dyson" <toor@dyson.iquest.net> To: marc@versa.eng.comsat.com (Marc Giannoni) Cc: freebsd-questions@FreeBSD.ORG Subject: Re: IDE DMA/33 Support Message-ID: <199802242209.RAA03544@dyson.iquest.net> In-Reply-To: <199802242143.QAA28389@versa.eng.comsat.com> from Marc Giannoni at "Feb 24, 98 04:43:52 pm"
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Marc Giannoni said: > I > Ahem...(sorry) I've seen a lot about DMA/33 for IDE these days. > Does the 'wd' driver support DMA yet? > If not are there plans to? > DMA/33 is pretty fast! About as fast as the PCI bus can go! > Current works with the PIIX* chipsets (Intel) in DMA or DMA/33 mode as appropriate and with a few others including the Promise board. If you use the older -stable code, the MB chipsets will work with FreeBSD, but will not work in DMA/33 mode. I personally run -current with (currently 6) IDE drives. 4 Drives on the PIIX3 on my SuperMicro P6DNF under SMP, and 2 Drives running DMA/33 on my Promise card. The system is very snappy, and performance is probably good enough except for certain types of server applications, where drive reliability or drive performance must be the highest. -- John | Never try to teach a pig to sing, dyson@freebsd.org | it just makes you look stupid, jdyson@nc.com | and it irritates the pig. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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