AIC7902 w/ seagate U320 drive issue on releng-4 (and current)

[Don Bowman]

> On Sat, 26 Jul 2003, Don Bowman wrote:
> 
> > Jul 26 19:27:20  /kernel: <<<<<<<<<<<<<<<< Dump Card State Ends
> > >>>>>>>>>>>>>>>>>>

FYI, i've solved this problem for me by moving to 
firmware version 5 on the ST318453LW (U320 15KRPM 18GB)
seagate drive.

If you are seeing the problem I mentioned with U320 
seagate drive and AIC7902 controller I highly recommend 
contacting seagate and requesting the latest rom.
Sadly the actual changes are 'proprietary' so I cannot
be sure this was the root cause of the problem. I'm
guessing there is an issue with large # of tags outstanding,
but its only a hunch.

I have code to program this ROM under FreeBSD i
will share with anyone who asks. I obtained this
from andre __AT__ albsmeier __DOT__ net, who had
posted information to this list in the past [thank
you!].

I cannot be 100% sure this fixes the problem, but it was
pretty easy to reproduce with 'dd if=/dev/da0 of=/dev/null bs=20k',
and now I cannot reproduce on the 15 systems I am trying.

--don