I have deployed a HCI environment several times now as I wanted to get some idea of disk performance with Gluster/ On a Dell R720 3 node cluster with H710 PERC controller and 8 x 2TB 7200 RPM SATA drives. My first test was with the 8 drives configured as H/W RAID 6 and I configured Gluster as RAID 6 - quite a lot of redundancy but that was just my first deployment Running IOMeter for 24 hours using all in one access specification I got 240 IOPs. Pretty good for SATA drives. I then broke the RAID and configured 8 virtual disks, one per physical and then deployed Gluster as JBOD - I am not sure how resilient that is, but I assume in a 3 node cluster failures to tolerate would be one. This gave me 267 IOPs. I don't know that much about the internals of Gluster, but when I first asked about this there didn't seem to be much knowledge of what configuration would be best for HCI. I plan to do more research and tests on this, but for what its worth for now, I am going down the JBOD route with no H/W RAID. Regards Bill