HP 20-Feb manual Write-Protecting DLT Cartridges, From the cartridge

Do NOT Use Cartridges with:

■Tape or leaders that have been touched with bare fingers (may transfer oils to the tape head).

■Labels used on the top, bottom, sides, or back of the cartridge. Use the label slot only.

Caution Always discard damaged tape cartridges. If a defective tape cartridge is loaded into a tape drive, it may in turn damage the drive, potentially requiring drive replacement.

Write-Protecting DLT Cartridges

Each cartridge has a sliding write-protect switch. Using the write-protect switch ensures data safety for files that have been previously written to tape, preventing additional files from being written to that tape.

To change the write-protect setting, move the write-protect switch (Figure 35):

■Left to prevent data from being written to the cartridge. The orange indicator on the cartridge can be seen when the write-protect switch is in the “ON” position.

■Right to allow data to be written to the cartridge. The orange indicator on the cartridge cannot be seen when the write-protect switch is in the “OFF” position.

Note	With the write-protect switch in either position, data can be read
	from the cartridge.

76 Using Tapes Chapter 2