Default memory only allows for 1GB per VM If capacity is your priority, Qsan's XCubeNAS XN7016R could be your ideal NAS. This 3U rack appliance offers 16 hot-swap drive bays, any of which can be fitted with SSDs for caching or data tiering. They're not limited to SATA, either: high-performance SAS3 drives are supported both inside and out, with a pair of external SAS3 ports allowing you to connect up to eight external 24-bay shelves. Qsan's partnership with Western Digital means you can even connect four massive Ultrastar Data60 or Data102 SAS JBOD arrays for a ludicrous raw capacity of up to eight petabytes.