Hi,
For both the Broadcom vmhba and the datastore I get a status of Hardware Acceleration Unknown.
After the storage array upgrade, the hardware acceleration status in the vSphere Client changes to supported after a short delay,
In vSphere 4.1 does not immediately register the change. The vSphere Client temporarily displays Unknown as the status for Hardware Acceleration.
This article provides answers to frequently asked questions about vStorage APIs for Array Integration (VAAI).