Re: LUN with high response times ? How to fix?
SAS are 15K rpm, and yes they are very busy - more than I expected.
We are reaching physical limit of disks for the VNX, I could maybe get another 2 RAID groups in there but we are due for a refresh next year so there may be some reluctance to spend $$s in the short term.
Would changing the autotiering policy to Highest first, then auto make a difference ?