HP Surestore Tape Library Model 2/15 User Manual page 69

WARNING
Do not attempt to disable the interlocks. If the library is operating
with fewer than three magazines inserted and the door open, the user
can be exposed to Class II laser light emitted from the bar code
reader.
8. Shut and lock the access door using the key lock. Make sure the door is
NOTE The library Inventory Check test runs when the access door is completely
closed so that an inventory of tape bar code labels and storage slot locations
can be stored into library memory. This process takes about one minute.
shut completely.
Library Operation
Removing Tape Cartridges from the Library
4-19