When a backend is exported to a domain as a full disk, it appears in that domain as a regular disk with 8 slices (s0 to s7). Such a disk is visible with the format(1M) command. The disk's partition table can be changed using either the fmthard(1M) or format(1M) command.
A full disk is also visible to the OS installation software and can be selected as a disk onto which the OS can be installed.
Any backend can be exported as a full disk except physical disk slices that can only be exported as single slice disks.