On Sun, May 29 2005, Jeff Garzik wrote:

Michael Thonke wrote:

quoted

Well the subjective feeling is great through! What I noticed is a
improvement on rsync (goes slighty faster drive to drive).
The noise decrease now it only make noise on very heavy IO reads and 
writes.

It might be as simple as...  NCQ means the drive is doing more work. 
More work means more noise.

You can argue both ways :-). Usually more noise means more seeks and
thus less work done.

-- 
Jens Axboe