Running a Dell R710 with the H700 RAID controller. I have 2 SAS disks connected in RAID 0, and I installed Windows Server 2016 directly on bare metal.
My disk read performance as measured by Crystal Disk Mark was almost 400 mb/s.
Fast forward to ESXi 6.0 installed on bare metal, and Windows Server 2016 running in a VM. No other settings changed. Crystal Disk Mark now indicates a read of 220-250 mb/s. The VM was thick-provisioned with eager zeroing.
What could be wrong with this VM to obtain such poor performance?
Thank you for any help!