> What's "od="? Fat fingers. of=, or course. > Not awfully surprizing given your setup. Ah, good.
> Keep in mind mpt uese a rather inefficient communication protocol and does > tagged queuing. You mean the protocol the main CPU uses to communicate with an MPT adapter is inefficient? Or do you mean SAS is inefficient? > The former means the overhead for each command is not so good, but the > latter means it can keep lots of commands in the air at the same time. I'm sorry, I'm unable to conclude why this explains my results. > Now you're just complicating things 8^). Sometimes, probably. > Let's see, RAID 1 is striping. Sorry, RAID 1 is mirroring. So, everything needs to be sent to two discs in parallel. I can't believe the CPU-HBA communication being a bottleneck?