Date: Tue, 28 Dec 1999 21:55:41 +0100 (CET) From: Soren Schmidt <sos@freebsd.dk> To: dgilbert@velocet.ca (David Gilbert) Cc: freebsd-current@FreeBSD.ORG Subject: Re: How to de-select DMA to ad0? Message-ID: <199912282055.VAA49015@freebsd.dk> In-Reply-To: <14439.54923.884773.393442@trooper.velocet.net> from David Gilbert at "Dec 27, 1999 04:13:47 pm"
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It seems David Gilbert wrote: > 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. There is no way (yet) other than hacking the code, but I'm working on it... -Søren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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