Exemplary tape library architectures and methods for recording errors in a tape drive are described. One exemplar method may be implemented in a processor a tape drive controller. The method comprises receiving, in a tape drive controller, an external identifier associated with a tape cartridge, recording the external identifier in a memory location associated with the tape drive controller, and associating, in a subsequent error analysis routine, an error in the tape drive with the external identifier of the tape cartridge in the tape drive.