ad0: WRITE command timeout...

Nelis Lamprecht nlamprecht at gmail.com
Thu Nov 4 22:47:34 PST 2004


On Thu, 4 Nov 2004 16:55:30 +0100 (CET), Are Bryne
<are.bryne at communique.no> wrote:
> On Thu, 4 Nov 2004, Nelis Lamprecht wrote:
> 
> > On Thu, 4 Nov 2004 14:10:42 +0100 (CET), Are Bryne
> > <are.bryne at communique.no> wrote:
> [...]
> >> After upgrading a computer from FreeBSD 4.8-something to 4.10-RELEASE-p3,
> >> I'm getting lots of the following:
> >>
> >> ad0: WRITE command timeout tag=0 serv=0 - resetting
> >> ata0: resetting devices .. done
> 
> The disk in question is a
> FUJITSU MPC3043AT/6018 using ATA/ATAPI rev 3 according to atacontrol.
> It is master on its controller and uses UDMA33 transfers, and has an idle
> PIO4 cd-rom player as a slave.

The cdrom drive may be forcing your hard drive to use a much slower
UDMA. If I were you I would connect the cd-rom player on your
secondary channel or at the very least disconnect it and see if your
problem persists and you might even find you get better tranfer rates.

Nelis


More information about the freebsd-questions mailing list