Command failures and timeouts are costly. You want your library to run smoothly and efficiently. To ensure continued processing, the UltraScalable Tape Library offers an optional control path failover feature that enables the host device driver to resend the command to an alternate control path for the same logical library. With control path failover installed, the alternate control path can include another HBA, SAN, or library control path drive. The device driver initiates error recovery and continues the operation on the alternate control path without interrupting the application. Only AIX hosts that run the IBM Atape device driver are currently supported for this feature; DLT control ports are not supported.