dynamox
6 Gallium

Re: LUN with high response times ? How to fix?

i don't think your pool is that big, mine has a lot more drives. I personally concentrate on IOPS and response time ..not as much on utilization. As long as you have a least one I/O ..disk will report as being utialized. SAS tier ..are those 10k or 15k drives ?  Maybe they are being worked a little too hard and time to add more drives to the pool ?