Date: Mon, 27 Dec 1999 16:13:47 -0500 (EST) From: David Gilbert <dgilbert@velocet.ca> To: freebsd-current@freebsd.org Subject: How to de-select DMA to ad0? Message-ID: <14439.54923.884773.393442@trooper.velocet.net>
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I've had my share of problems with this drive's DMA abilities. I'm convinced that it has none... even though it probes as such. ad0: <NEC Coporation DSE2550A/5DE0314> ATA-0 disk at ata0 as master ad0: ... ad0: 16 secs/int, 1 depth queue, DMA now... when I boot -v, I don't have a chance to write down what it says, but it will hang every time with the following output: ad0: ad-timeout: lost disk contact ata0: resetting drives -- mask=03 status0=50 status1=50 .. And that's it. It never prints out "done" which I see in many of the list messages. Is there a way of disabling DMA on a specific drive? I read a bit of the source, but didn't find any obvious documentation on the issue. (This is all on a kernel compiled from a cvsup this afternoon) Dave. -- ============================================================================ |David Gilbert, Velocet Communications. | Two things can only be | |Mail: dgilbert@velocet.net | equal if and only if they | |http://www.velocet.net/~dgilbert | are precisely opposite. | =========================================================GLO================ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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