From owner-freebsd-questions Thu Jun 17 21:15:42 1999 Delivered-To: freebsd-questions@freebsd.org Received: from hyperreal.org (taz.hyperreal.org [209.133.83.16]) by hub.freebsd.org (Postfix) with SMTP id A77171506A for ; Thu, 17 Jun 1999 21:15:41 -0700 (PDT) (envelope-from mike@hyperreal.org) Received: (qmail 5257 invoked by uid 12); 18 Jun 1999 04:15:41 -0000 Message-ID: <19990618041541.5256.qmail@hyperreal.org> From: mike@hyperreal.org Subject: Re: Optimizing IDE performance revisited In-Reply-To: <19990618092337.O9893@freebie.lemis.com> from Greg Lehey at "Jun 18, 1999 09:23:37 am" To: grog@lemis.com (Greg Lehey) Date: Thu, 17 Jun 1999 21:15:41 -0700 (PDT) Cc: freebsd-questions@freebsd.org X-Mailer: ELM [version 2.4ME+ PL51 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Greg Lehey wrote: > > Now this is odd. The BIOS is set to enable 32-bit transfers. > > Wonder why it's not coming up here like it is on yours. > > It's a feature of the controller chip set. Yours obviously doesn't > support DMA. I was asking about 32-bit transfers. According to the driver flags, DMA support (0x2000) and 32-bit transfer support (0x8000) are two different things. Or is it not possible to have 32-bit transfers without DMA? (I realize, of course, that the EIDE FAQ says 32-bit transfers are somewhat of a misnomer and aren't going to improve speed noticeably). To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message