I just built a CentOS7 system on a Zotac NANO PC. I used a 320GB 2.5" HD I had sitting around and installed with Standard Partitions on XFS. The drive is spinning, nonstop. How can I monitor if there is actually disk i/o to warrant this constant spinning. So noatime for all partitions work with XFS? I did some browsing and the claim is XFS uses realtime which is better? than noatime? Perhaps it is just occasional writes to messages (at least 1 a minute) that determines to keep on spinning. But it is annoying.