When configuring Xsan, If you create users and groups individually on each SAN computer without using a directory service (like Open Directory), what must you do?

If you create users and groups individually on each SAN computer, be sure that each user or group name is assigned the same numeric user ID (UID) or group ID (GID) on all SAN computers. One way to do this is to create an identical list of users and groups in the same order on each computer following a fresh install of the operating system.