Another (posible) data point.

 	I've been seeing very similar issues on two of my boxes (0xe),
 	and switched one of then to a GENERIC 3 kernel from NetBSD.org,
 	but it happened again (after about four days). If this is the
 	same issue then it rules out PF for me (my only common factor).

 	I'm going to dig out a SATA card and swap out every piece of
 	hardware apart from the disks next, just to make absolutely
 	certain I have a software issue and not a rogue datapoint.

-- 
 			   David Brownlee -- abs@absd.org