To ensure that VAAI is turned on and ESXi 5 host:
1) Login to vCenter
2) Browse to an ESXi host under ‘Hosts & Clusters’
3) Select the ‘Configuration’ tab
4) In the ‘Software’ section click ‘Advanced Settings’
5) Check the following settings and ensure they are set to 1
- DataMover.HardwareAcceleratedMove
- DataMover.HardwareAcceleratedLock
- VMFS3.HardwareAcceleratedLocking