About injecting and ejecting volumes
Media access port (MAP) functionality differs between robotic libraries. For many libraries, NetBackup opens and closes the MAP as needed. However, some libraries have the front-panel inject and the eject functions that conflict with NetBackup's use of the media access port. And for other libraries, NetBackup requires front-panel interaction by an operator to use the media access port.
Read the operator manual for the library to understand the media access port functionality. Some libraries may not be fully compatible with the inject and eject features of NetBackup unless properly handled. Other libraries may not be compatible at all.