Linux and FreeBSD label hard drives and partitions after two differents schemes. This section explains the main differences between the two schemes. In fact the FreeBSD labelling scheme is an adaption of the traditional BSD labelling style ported to live within the PC's fdisk partitions. Thus it is very similar to other BSD-based Unix systems such as NetBSD, OpenBSD, Ultrix, Digital Unix, SunOS, and Solaris.