Install the primary and the secondary servers in the same directory path, but on separate disks. The primary companion can be either a newly installed Adaptive Server, or it can be upgraded from an earlier version of Adaptive Server with existing databases, users, and so on.
The secondary companion must be a newly installed Adaptive Server and cannot have any user logins or user databases. To ensure that all user logins and database names are unique within the cluster. After you have completed the configuration, you can add user logins and databases to the secondary companion.
See the installation documentation for your platform for information about installing and configuring Adaptive Server.
