On Tue, Dec 21, 2004 at 10:26:09AM -0800, Brian Buhrow wrote:
> 	ABout four years ago, I built a NetBSD box with 16 IDE disks raided
> together using Promise EIDE controllers.  When the raid ran at full tilt, I
> saturated the PCI bus, causing strange hangs and error messages of the type
> you're seeing.  To fix the problem, I ran the disks in UDMA mode 1, rather
> than UDMA mode 4 at the time.  It looks like all of your disks are running
> in UDMA mode 5, which is pretty fast, considering how many disks you have
> going at once.  I might suggest compiling a special kernel and turning down
> the maximum speed to UDMA mode 4, or, even 3 or 2.  Experiment with
> successively slower speeds until the bogus interrupts go away.  Although
> the disks will run slower individually, you  probably won't notice any real
> performance loss from the "daily use" perspective.  Plus, any performance
> hit you take will be more than compensated by the increased reliability
> you'll get from the box.  Your users will be much happier when you don't
> have to keep rebooting the box and calibrating the parity on the raid.

Hi, I downgrades the UDMA to mode 4 and testd it, it worked fine until now.
Thanks for the suggestion!
Welcome the 2.0 release. :)
I will start to mirror NetBSD. ;)

-rxg