I always had weird luck with scsi termination on my A3K with the CSPPC board. In some drive configurations, it would not work if you terminated it. In others, it would not work unless it was terminated. Sometimes active termination was required, sometimes passive... I experimented until it worked and then left it like it was.
It may sound crazy, but it is true... I think it may have been an issue with using different scsi formats on the same chain. I had a mix of scsi1/2 and UW. It was only as fast as the slowest drive in the chain.
