From owner-freebsd-questions Wed Nov 1 22: 0: 0 2000 Delivered-To: freebsd-questions@freebsd.org Received: from gateway.telecom.ksu.edu (gateway-1.telecom.ksu.edu [129.130.63.239]) by hub.freebsd.org (Postfix) with ESMTP id 9F47537B479 for ; Wed, 1 Nov 2000 21:59:57 -0800 (PST) From: beemern@sioux.telecom.ksu.edu Received: from sioux.telecom.ksu.edu(129.130.60.32) by pawnee.telecom.ksu.edu via smap (V2.0) id xma004171; Wed, 1 Nov 00 23:59:28 -0600 Date: Wed, 1 Nov 2000 23:58:48 -0600 (CST) To: Arcady Genkin Cc: freebsd-questions@FreeBSD.ORG Subject: Re: ad0: DMA problem fallback to PIO mode; HARD READ ERROR blk#25418687 In-Reply-To: <87hf5r1eso.fsf@tea.thpoon.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG well.. a quick search of the list archives yielded refrences to sysctl hw.atamodes and man ata(4) also, look in LINT for stuff about hd flags and what-not and.. WDMA is not the same as UDMA apparantly, man ata has details regarding your specific chipset hopefully one or more of those will lead you too a solution it still COULD be bad hardware... i apologize if thats the case... your first post looked like an easy problem at first... guess not ): anyway... good luck! nathan On 1 Nov 2000, Arcady Genkin wrote: > nathan writes: > > > > Now the question is how to disable DMA in the kernel. I see option > > > #options ATA_ENABLE_ATAPI_DMA > > > but it's commented out. Is there any other way to tell the kernel not > > > to use DMA for ata driver? > > > > what file is that you are looking at? > > My kernel config file. I also looked in LINT, but didn't find > anything new. > > > see the handbook on building custom kernels on at freebsd.org for > > complete accurate instructions > > This is not what I meant. I know how to recompile a kernel. I just > don't know how to disable DMA. In my kernel config file DMA is not > enabled... > > Any ideas, anyone? > > Thanks again, > -- > Arcady Genkin > Don't read everything you believe. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message