Date: Thu, 14 Feb 2002 22:46:58 +0100 From: Cliff Sarginson <cliff@raggedclown.net> To: vanya <UnixDaemon@vicard.net> Cc: freebsd-questions@FreeBSD.ORG Subject: DMA on ATAPI CD's [ Was Re: About printers ] Message-ID: <20020214214657.GB347@raggedclown.net> In-Reply-To: <000801be3bd9$b17799e0$942a2cc2@og> References: <000801be3bd9$b17799e0$942a2cc2@og>
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On Sat, Jan 09, 1999 at 05:09:35PM +0300, vanya wrote: <snip> (Best to keep unrelated questions in seperate posts). > And one question about DMA for EIDE disks and ATAPI CD. Is DMA automatically > enabled or user must turn on this option? I believe DMA is not enabled on ATAPI CD devices, I believe it is considered a source of possible instability in certain cases (I know of no proof for this..) .. you can forceably re-enable it by an entry in sysctl.conf. I have 2 IDE i/faces, with a hard drive and a CD/DVD on one slave and a CD R/W on another. My line looks as follows: hw.atamodes=dma,dma,dma,dma You will need to adjust this according to your actual IDE setup, (i.e. how your ide's are actually configured)... "man 8 sysctl.conf" may help. -- Regards Cliff To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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