ZFS (zettabyte file system) is a file system developed by Sun Microsystems. To be released in update 2 of Solaris 10 it is the first 128-bit file system. Supported on both SPARC and PC (x86) platforms it is endian-neutral and is a journaled file system.

The storage capacity provided should outlast Moore’s Law for some time. To quote a Sun developer, "Populating 128-bit file systems would exceed the quantum limits of earth-based storage. You couldn't fill a 128-bit storage pool without boiling the oceans."