Date: Thu, 4 Jan 2001 20:27:33 -0800 (PST) From: Rich Wales <richw@webcom.com> To: freebsd-stable@freebsd.org Subject: Re: ad0: WRITE command timeout tag=0 serv=0 - resetting Message-ID: <20010105041405.89714.richw@wyattearp.stanford.edu>
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Max Khon wrote:
> > ad0: WRITE command timeout tag=0 serv=0 - resetting
> > ata0: resetting devices .. done
> > ad0: WRITE command timeout tag=0 serv=0 - resetting
> > ata0: resetting devices .. done
Mads Hugo Pedersen replied:
> I had a similar problem with an old chipset which did not
> support dma, so the controller (ata0) made a fallback to
> pio. I edited /etc/sysctl.conf and added this line:
> hw.atamodes=pio,pio,pio,pio
I had the same problem with an old motherboard which claimed to support
DMA (but didn't). Setting PIO in /etc/sysctl.conf wasn't good enough,
because the timeouts started happening while mounting file systems,
which happens before /etc/sysctl.conf is processed.
I ended up adding a "sysctl" command to /etc/rc.conf in order to get it
done soon enough. I had to use the program's full path (/sbin/sysctl),
and I should probably also add ">/dev/null 2>&1" to the command so the
output will be discarded.
Rich Wales richw@webcom.com http://www.webcom.com/richw/
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