From owner-freebsd-questions Mon Oct 27 07:13:36 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id HAA24797 for questions-outgoing; Mon, 27 Oct 1997 07:13:36 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from bsd.synx.com (rt.synx.com [194.167.81.239]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id HAA24778 for ; Mon, 27 Oct 1997 07:13:22 -0800 (PST) (envelope-from remy@synx.com) Received: from s3.synx.com (s3 [192.1.1.247]) by bsd.synx.com (8.6.12/8.6.12) with SMTP id QAA25413; Mon, 27 Oct 1997 16:15:31 +0100 Received: from rs1 by s3.synx.com id aa16763; 27 Oct 97 16:04 GMT Date: Mon, 27 Oct 1997 17:00:29 -0100 (GMT) From: Remy NONNENMACHER To: Doug White cc: "David A. Allem" , freebsd-questions@freebsd.org Subject: Re: Ultra DMA In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Sun, 26 Oct 1997, Doug White wrote: > On Thu, 23 Oct 1997, David A. Allem wrote: > > > the hardware referred to as ultra dma or ultra ata, etc.. that supports > > a transfer rate of 33mb/s, is this something that is easily supported > > with free bsd, or is this not an option, i work at a computer store and > > i have a lot of clients and also family wondering about this , if you > > could please let me know i will be very appreciative > > It is supported directly in 3.0-CURRENT; otherwise you get the standard > IDE treatment. > Best say : supposed to be supported. 3.0 recognizes correctly IDE U-DMA chips but tests gave me half the perfs between the 3.0 and the 2.2.2 with same disk and same Hardware. Lack of chip exploitation ?, 3.0 disk handling diffs ? This would need some investigation. I would be happy to (humbly) offer some time to investigate this if some great chipset/disk driver writers can point me some lecture. All you *BSD* boys : THANKS FOR YOUR WORK !!.