Dell PowerVault 132T LTO Handbook page 17

Figure 1-23. Type IV Media Engagement
Cartridge Damage Examples
Figure 1-24. DLT Cartridge — Leader missing (swallowed cartridge leader or broken tape)
Figure 1-25. DLT Cartridge — Broken leader loop (not always this obvious)
Figure 1-26. Media wrapped too loosely (improper tension)
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Dell PowerVault DLT, VS, and SDLT Media Handbook Version 2.0