If VMware aims to transform storage presentation, and is working with major storage vendors to make it happen, HDS ought to be part of it. Their history, technology, and market position earn them a spot in the “VAAI Cabal” and their omission was a bombshell to industry-watchers like me.
The most exciting enhancements in VMware vSphere 4.1 is the addition of vStorage API for Array Integration (VAAI). This new API allows VMware ESX to offload storage processing functions to capable storage arrays, reducing the workload on the server hardware in introducing new and exciting possibilities for performance and efficiency. VAAI in ESX 4.1 includes three separate capabilities: block zeroing, full copy, and hardware assisted locking.