When a back end is exported to a domain as a single-slice disk, it appears in that domain as a regular disk with eight slices (s0 to s7). However, only the first slice (s0) is usable. This type of disk is visible with the format(1M) command, but the disk's partition table cannot be changed.
A single-slice disk is also visible from the OS installation software and can be selected as a disk onto which you can install the OS. In that case, if you install the OS using the UNIX File System (UFS), then only the root partition (/) must be defined, and this partition must use all the disk space.
Any back end can be exported as a single-slice disk except physical disks that can only be exported as full disks.