1. A method for positioning a robotic mechanism with respect to a storage magazine to install a data cartridge in or remove the data cartridge from a destination slot of a plurality of slots of the storage magazine, the method comprising: scanning across the storage magazine using an optical scanner to acquire scan data; processing the scan data to identify a targeting feature and a target location corresponding to the identified targeting feature, wherein each of the plurality of slots is defined by a structural opening having at least a first side shaped for lead-in and a second side opposite the first side and shaped for either lead-in or targeting, the identified targeting feature being a second side of one of the plurality of slots shaped for targeting; determining a slot location of the destination slot according to the target location; determining whether the second side of the destination slot is shaped for targeting; positioning the robotic mechanism according to the slot location; and positionally biasing the robotic mechanism toward the first side of the destination slot when the second side of the destination slot is shaped for targeting.