Date: Wed, 23 Aug 2000 15:44:15 -0600 From: "Jamie Hermans" <freebsd@hermans.ab.ca> To: <freebsd-questions@freebsd.org> Subject: Auto DMA vs. Manual DMA Settings... FBSD 3.51 Message-ID: <002101c00d4b$48d04190$641ba8c0@hermans.ab.ca>
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Hiya... I am having an issue with the wd driver (from FBSD 3.51). Once a customer kernel (having the flags 0xa0ffa0ff for wd) is booted, I get screen-full's of this error message when there is any hard drive access: DMA failure, DMA status 5<active> I can "slow down" or degrade my DMA settings in the BIOS to avoid this message, but I'm sure I am taking a performance penalty in doing this. For more history, please refer to: http://www.freebsd.org/cgi/mid.cgi?db=mid&id=19991220124638.B37447@web.net ... where this was covered back in December 1999 - I had hoped that this would have been resolved by now. System hardware - Maxtor UDMA66 drive, motherboard only supports UDMA33 however, so that's not really an issue. My question ... can I use the ad driver from 4.x with 3.51-RELEASE? This problem doesn't occur under 4.0 or 4.1-RELEASE/STABLE. If this is possible ... how? Thanks for any thoughts (or even solutions) :) Regards ... Jamie To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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