Erasing a tape (or "formatting", depending on why you talk to) can be done in-app, through the LTO menu.
LTFS requires a tape to be unmounted before erasing a tape, so first, eject a tape if it's already mounted. When done, the Erase option will be enabled:
Each LTFS-formatted tape requires a name, and may use an optional serial. A serial must be 6 characters. If you do not have a system in place to track tapes using the serial, we suggest using
YYMMDD as the timestamp to use as a simple mechanism to give you a bit of context on when a tape has been created.
All tapes Canister erases automatically get Discovery Channel compatibility.