Justin Piszcz wrote:
Checking the benchmarks on various hardware websites, anandtech, hothardware and others, they generally all come to the same conclusion if there is only 1 thread using I/O (single user system) then NCQ off is the best.
Are they testing using Linux? I/O performance is highly dependent on workload and scheduling, so result on windows wouldn't be very useful. Posting some links here would be nice.
I see 30-50MB/s faster speeds with NCQ turned off on two different SW RAID5s.
You're testing raptors, right? If the performance drop is that drastic and consistent over different workloads, we'll have to disable NCQ for raptors. I'm not sure about other drives. Care to perform tests over more popular ones (e.g. recent seagates or 7200rpm wds)?
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