ATA DMA timeouts [NOT FIXED] (forget my last mail)

[Brian Fundakowski Feldman]

On Fri, Jun 24, 2005 at 11:58:56PM +0100, Tony Byrne wrote:
> Hello Martin,
> 
> M> believe it or not. After sending the last mail and closing
> M> firefox, the system has been hanging for a few seconds and
> M> spit this out:
> 
> M> ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=226025086
> 
> Yeah, I updated and rebuilt on seeing your email, but found it did
> little.  I has TIMEOUTs again within 10 minutes of rebooting.
> 
> M> Sorry for causing noise. :(
> M> I'm going to test a kernel every week and report, when the
> M> problems are gone.
> 
> I'd certainly be interested in hearing about your results, but from
> the general lack of discussion of the problem on this list, I'm
> guessing we may be on our own. I'm not sure anyone is actually working
> on a "fix", because I'm not sure the problem is recognized.
> 
> I have two separate Intel IHC5 based boxes affected by DMA TIMEOUTS,
> both with SATA drives and I'd like to get to the bottom of this.

The best thing to do is narrow down what kernel changes caused this
(build kernels from various cvs update dates to zero in on the cause).

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green at FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\