From owner-freebsd-hardware Mon Aug 24 23:11:43 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA06883 for freebsd-hardware-outgoing; Mon, 24 Aug 1998 23:11:43 -0700 (PDT) (envelope-from owner-freebsd-hardware@FreeBSD.ORG) Received: from owl.org (owl.org [198.206.215.91]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id XAA06870 for ; Mon, 24 Aug 1998 23:11:39 -0700 (PDT) (envelope-from cgull@owl.org) Received: (from cgull@localhost) by owl.org (8.8.8/8.8.8/cgull) id CAA10317; Tue, 25 Aug 1998 02:10:27 -0400 (EDT) (envelope-from cgull) Message-ID: <19980825021026.12093@owl.org> Date: Tue, 25 Aug 1998 02:10:26 -0400 From: john hood To: Joe Gleason Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: UDMA Support References: <00f001bdcde3$7e14bb00$0171a1ce@bug.tasam.com> <199808221929.TAA20855@dingo.cdrom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.89.1 In-Reply-To: <199808221929.TAA20855@dingo.cdrom.com>; from Mike Smith on Sat, Aug 22, 1998 at 07:29:03PM +0000 Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Sat, Aug 22, 1998 at 07:29:03PM +0000, Mike Smith wrote: > > Does FreeBSD have Ultra DMA support or will it have it? > > 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. :) --jh -- Mr. Belliveau said, "the difference was the wise, John Hood, cgull intelligent look on the face of the cow." He was @ *so* right. --Ofer Inbar owl.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message