There is a separate z/FS file system allocated on single volume (disk) for the Domino execution, data (excepting client mail databases), and the Domino Directory (Names.nsf).

There was a separate z/FS file system allocated on a single volume (disk) for the Domino execution, data (excepting client mail databases), and the Domino Directory (Names.nsf).

RAID-Z is not the only type of disk array available to ZFS. Mirrors are usually faster and less memory-consuming, but require equal Numbers of hard drives to use it.