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

[Nate Lawson]

On Sun, 27 Jul 2003, Don Bowman wrote:
> 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.

For you and anyone else who experiences "SCB timed out errors", upgrading
drive firmware usually fixes this problem.  Also, you can limit the number
of tags in use by "camcontrol tags".

-Nate