There are two passwords for the L1000, L1800, L3500 and L11000 tape libraries.
By default they are:

Operator Password: 1234

Service Password: 5678

If these passwords are changed and subsequently forgotten, the administrator 
will be unable to perform operator and service task on the tape library LED
control panel.       

To solve this problem, ATL has hard-coded a super-user password into the tape
library for just this reason. The following password over-rides the service and 
operator passwords:

Super-User Password: 711227

Use this password to gain access to the service and operator screens and change
the passwords back to the default settings or another password chosen by the 
administrator.