Date: Mon, 18 Dec 2000 15:09:48 -0800 From: Brooks Davis <brooks@one-eyed-alien.net> To: Randy Primeaux <randy@Cloudfactory.ORG> Cc: doc@FreeBSD.ORG Subject: Re: kernelconfig-config.html: ATA_ENABLE_ATAPI_DMA Message-ID: <20001218150948.B10804@Odin.AC.HMC.Edu> In-Reply-To: <200012182322.PAA14493@relay.ultimanet.com>; from randy@Cloudfactory.ORG on Mon, Dec 18, 2000 at 03:04:12PM -0800 References: <200012182322.PAA14493@relay.ultimanet.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, Dec 18, 2000 at 03:04:12PM -0800, Randy Primeaux wrote: > The following entries are not clear to me, i.e. risk vs. benefit. > I have UDMA33/66/100 devices, and am considering enabling > ATA_ENABLE_ATAPI_DMA on a pci bus. Many stupid ATAPI devices (CD drives, ZIPs, etc) claim to support DMA, but crash your system if you try to use it. Thus you can't turn this on be default. It's worked for me on some systems, but there is no list of working devices and it's unlikely that one will ever exist given that CD drives are pretty much commodity devices and thus there's a lot of junk out there. This doesn't belong in the handbook, IMO. If you can suggest a better comment for the config file that wouldn't hurt, but it's a very minor option. -- Brooks -- Any statement of the form "X is the one, true Y" is FALSE. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20001218150948.B10804>