"One of the key features of Solaris 10 is its Zettabyte File System (ZFS) that provides more storage flexibility and scalability to Unix. For the past four years, however, ZFS was not integrated into the deepest parts of the Solaris operating system -- a shortcoming that denied administrators access to its advanced administration and recovery features.
"That changed today, with the release of Solaris 10 update 10/08, which extends ZFS into the Solaris root. The update also provides better integration support for Sun's legacy Solaris 8 customers."