sd0 at scsibus0 target 1 lun 0: <SGI, IBM DORS-32160, WA6A> disk fixed
This is a problematic drive - see my changes for revision 1.15 of dev/ ic/wd33c93.c for more info. With that workaround it ran fine for me, but I don't recall if I ever used it in a system with multiple targets.
It could well be unrelated, but hopefully it's a starting point in where to look.
Steve