Quantum DLT 4000 Product Manual page 55

4. You can use the drive's control panel at various times, not just after loading a
tape. Density selection is inactive until the write from BOT command is issued.
The controller remembers the density selection state until you do one of the
following:
Density Select Example
If you have loaded a tape with a prerecorded 2.6 GB density and you use the Density
Select button to select 10.0 GB density, the following should happen:
The 2.6 indicator remains lit—density has not changed yet and the steady light
indicates recorded tape density
The 10.0/15.0 indicator blinks—density change is pending
Density Override lights
When a write from BOT occurs, the following should happen:
The 2.6 indicator turns off
10.0/15.0 indicator is on steady
Density Override remains lit
Configuring and Operating the DLT4000 Basic Tape Drive
Change the density selection
Unload the tape
DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem 3-9