Date: Mon, 18 Dec 2000 15:49:39 -0800 From: Brooks Davis <brooks@one-eyed-alien.net> To: "David W. Chapman Jr." <dwcjr@inethouston.net> Cc: stable <stable@FreeBSD.ORG> Subject: Re: DMA33 ATAPI CDROM and 4.2-STABLE Message-ID: <20001218154939.A15680@Odin.AC.HMC.Edu> In-Reply-To: <015d01c0694b$c34952c0$931576d8@inethouston.net>; from dwcjr@inethouston.net on Mon, Dec 18, 2000 at 05:39:28PM -0600 References: <015d01c0694b$c34952c0$931576d8@inethouston.net>
next in thread | previous in thread | raw e-mail | index | archive | help
[This belongs on -questions.] On Mon, Dec 18, 2000 at 05:39:28PM -0600, David W. Chapman Jr. wrote: > I'm running 4.2-stable > > FreeBSD leviathan.inethouston.com 4.2-STABLE FreeBSD 4.2-STABLE #1: Mon Dec > 18 10:09:41 CST 2000 poseiden@leviathan.in > ethouston.com:/usr/src/sys/compile/LEVIATHAN i386 > > and I get this in my dmesg > > acd0: CDROM <TAEIL CDD-7400A> at ata3-master using PIO4 > > the promise ultra/66 bios tells me that it does dma/33 and so does the box > that I bought it on. It is slaved off of my dma/66 harddrive with freebsd > detects as 66 and I'm using the correct cable, any suggestions? Here's my > full dmesg...atapci0 is my onboard ide controller for my abit tx5, not sure > why it gives me the error it does on that controller, but it doesn't matter > as I use the promise ultra/66 controller. I don't think I'd notice the > performance increase much, but if this is a bug, I wouldn't mind getting it > fixed if anyone has some free time to help me. DMA is disabled by default for ATAPI devices like CD-ROM drives because many report that the support it but just crash your system if you actually try to use it. If you really want that virtualy useless speedup you can enable the option ATA_ENABLE_ATAPI_DMA in your kernel config. -- 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-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20001218154939.A15680>