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Abstract

An automated cartridge library has a calibration cartridge which includes a radiation (e.g., optical) source, as well as a frame which accommodates a cartridge-receiving unit and a calibration cartridge storage location. The cartridge-receiving unit can be one or both of a media cartridge storage location (e.g., a cell in a cartridge magazine) and a drive which performs at least one of recording and reproducing operations with respect to media in a media cartridge loaded into the drive. A transport device of the library transports the calibration cartridge between the calibration cartridge storage location and the cartridge-receiving unit. The transport device has a radiation detector which can be aligned with the radiation source of the calibration cartridge when the calibration cartridge is in the cartridge-receiving unit. In operation of the library, the radiation source included in the calibration cartridge is activated. The transport device transports the calibration cartridge from the calibration cartridge storage location to the cartridge-receiving unit. Upon insertion of the calibration cartridge into the calibration cartridge storage location, the transport device is positioned so that the radiation detector carried by the transport device is aligned with radiation emitted from the radiation source of the calibration cartridge. A calibration reference value for the cartridge-receiving unit is determined when the radiation detector is aligned with the radiation source included in the calibration cartridge. The calibration reference value can be, for example, a spatial coordinate of the library.

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