From owner-freebsd-current  Wed Dec  8  8:47: 4 1999
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From: Soren Schmidt <sos@freebsd.dk>
Message-Id: <199912081646.RAA62277@freebsd.dk>
Subject: Re: ATA driver as the default
In-Reply-To: <384E8633.BD23E6CC@dead-end.net> from "D. Rock" at "Dec 8, 1999 05:24:19 pm"
To: rock@dead-end.net (D. Rock)
Date: Wed, 8 Dec 1999 17:46:42 +0100 (CET)
Cc: ambrisko@whistle.com (Doug Ambrisko), current@FreeBSD.ORG
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It seems D. Rock wrote:
> I don't think I have the same problem. My drive definitely doesn't spin
> down. It sometimes occurs during heavy usage, so the drive should still
> be very alive. With PIO mode I also don't have any timeout problems.
> I also had the same DMA problems with the old wd driver and under Windows.
> The problem is, that the new driver doesn't allow to selectively turn
> off DMA for problematic devices.
> 
> I now had commented out the DMA activation code in ata-disk.c (DMA
> is still activited on the CD-ROM drive though) and I will see how the
> system behaves.

I'm working on a way to select DMA or not on each device via a
sysctl, that should fix your problem...

-Søren


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