Library Power On Self Test and Initialization
After powering up or resetting the tape library, or opening, closing, and locking the front door of the tape library, the library automatically executes POST and the initialization routine, which includes some robotic motion.
If POST or initialization fails, the library displays the appropriate library error code and shuts down power (24 V) to the robotic shuttle drive motors.
Power shutdown to the robotic shuttle can be noted by the 24 V light turning off.
The 24 V light is on the controller at the back of the library (see Figure 3).