Date: Tue, 25 Aug 1998 15:59:13 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: john hood <cgull@owl.org> Cc: Joe Gleason <freebsd.list@bug.tasam.com>, freebsd-hardware@FreeBSD.ORG Subject: Re: UDMA Support Message-ID: <199808250629.PAA06960@cain.gsoft.com.au> In-Reply-To: Your message of "Tue, 25 Aug 1998 02:10:26 -0400." <19980825021026.12093@owl.org>
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> > FreeBSD 3.0 supports IDE DMA. SCSI disks will give better performance > > in multiple-disk or high load scenarios. > -current supports DMA, but not Ultra DMA, which is faster and has > CRC error checking. (I haven't got an Ultra DMA motherboard and > drive to code/debug on.) This is not much of a problem yet, as > IDE drives cannot yet use all the bandwidth of standard DMA, but > it looks like it will be soon, the way IDE drives are going. :) And the less time the computer spends moving data off your HD means more time to render Quake frames (or something). I have a UDMA mobo and 3 UDMA drives, so I can test it for you. I could probably code some of it if I knew what to do =) (ie the UDMA spec) --------------------------------------------------------------------- |Daniel O'Connor software and network engineer for Genesis Software | |http://www.gsoft.com.au | |The nice thing about standards is that there are so many of them to| |choose from. -- Andrew Tanenbaum | --------------------------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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