Several sites are reporting on ZFS support that is now built into the latest build of Mac OS X (Leopard) which was seeded last week. The ZFS team at Sun was contacted by Apple in April about porting ZFS to Mac OS X. Arstechnica previously discussed advantages of ZFS as a file system. These include - Efficient storage and handling of very small files. - Logical volume management through a pooled storage model. - Improved data integrity using checksums on all data. - Snapshots Mac4Ever first posted a screenshot of the ZFS formatting option now in Leopard: More information on ZFS is available at the ZFS homepage and Wikipedia.