You could build a server which could function as a NAS. But if you want to run a hypervisor (specifically VMWare) you won't get that from a commercial NAS except maybe from EMC/Dell since they own a stake in VMWare.
You could build a server which could function as a NAS. But if you want to run a hypervisor (specifically VMWare) you won't get that from a commercial NAS except maybe from EMC/Dell since they own a stake in VMWare.