Adaptec 7220ss User Guide

You should understand how the controllers act in different active-
active scenarios.

■

—When both controllers boot at the same time, they 

exchange information related to their current configuration and 
the ownership of resources. The time and date of the B controller 
is synchronized with that of the A controller.

■

—When a controller adds an array, that controller is 

owner of the array, as well as any dedicated spare disk drives. 
Arrays and dedicated spares are not visible to the other 
controller when both controllers are online.

■

—A controller may only delete arrays that it owns.

■

—Pool spares are visible to both 

controllers when both controllers are online. 

■

—When a failover occurs, the surviving controller will 

display FAILED OVER on Adaptec Disk Array Administrator, 
in the area between the board temperature and date. At this 
point, the arrays, dedicated spares, and pool spares of the failed 
controller belong to the surviving controller. Resources from the 
failed controller are tagged with (FO).

■

—When a failback occurs, the controller coming online 

regains control of its arrays, dedicated spares, and pool spares 
from the other controller.

To change the operating mode:

From the System Menu, select Configuration Menu and press 
Enter

.

The Configuration menu appears. 

Select Option Configuration and press Enter.

The Option Configuration menu appears.

Select Operating Mode and press Enter.

The Operating Mode menu appears.