B320i and VMWare ESXi

[renzme]

I have two HP ProLiant DL360e (G8) with B320i controller (512MB with battery). If i install Windows 2008R2 or Hyper-V everything working fine (normal hdd speed and iops). But when i install ESXi server (5.0, 5.1, 5.5, 6.0) the speed is very slow (only 70 iops) and any manipulation with ACU (enable Cash or disable and other) don't do anything.
Are there any considerations?

[renzme · Accepted solution]

Solved. The problem is in drivers (B320i) in new versions of custom HP VMware ESXi (Update 3). After installation VMware 5.1 U1 or 5.5 U1  speed immediately increased.