The host names and IP addresses for arrays are based on the arrays' positions in the cabinet:
The array in the lowest position in the base cabinet has the host name array00
, indicating that it is the array on the bottom of cabinet 0. The lowest array in the first expansion cabinet is array10, and the lowest array in the second expansion cabinet is array20.
Within each array, the bottom controller tray is the master and the top controller tray is the alternate master. For example, the controller tray in tray1 is the master, and the controller tray in tray2 is the alternate master. If the master controller tray fails, the alternate master controller tray uses the array's IP address.