Quantum ATL M-Series - Manual (Page 183)

Appendix C DLTtape Cartridge Maintenance
Visual Inspection of DLTtape Cartridges
ATL M-Series User’s Guide 165
The switch should snap back and forth, and the orange tab
should be visible when the switch is in the write-protected
position.
Figure 59 Write
Protect Switch
Write-protect
switch