Auto-Logical Drive Transfer (ADT)

I/O data path protection to redundant controllers in a storage subsystem is accomplished with the Auto-Logical Drive Transfer (ADT) feature and a host multi-path driver.

ADT is a built-in feature of the controller firmware that manages individual logical drives on a storage subsystem. When it is enabled and used in conjunction with a host multi-path driver, it helps ensure that an I/O data path is available for the logical drives on the storage subsystem.

If there is a component failure or some other error occurs on the data path to the preferred controller, ADT and the multi-path driver automatically transfer the arrays and logical drives to the other "non-preferred" controller for processing. Once the I/O data path problem is corrected, the preferred controller will reestablish ownership of the arrays and logical drives.

For more information, see Learn About Failover Protection Settings on the Learn More tab.