B bare metal Non-VMware virtualized operating system and applications that run on systems. block (block device, block storage) Storage design that allows direct data access at a LUN level from a host. In a block access design, the host provides all access and sharing facilities for the LUN. This design differs from file access, where the storage system maintains the file system and all lock management for the hosts that are accessing the data. Typical block protocols are FC, FCoE, and iSCSI.