Erasing A Prewritten Lto Tape; Figure 14- Setting The Write-Protect Switch - Dell PowerVault 136T LTO Handbook

12 Erasing a prewritten LTO Tape

Notice: Write-protection will not prevent a cartridge from being erased by bulk-erasure or
degaussing. Do not bulk erase Ultrium format cartridges. This will destroy pre-recorded servo
information and render the cartridge unusable.
The erase feature in backup software is the preferred method for erasing an LTO tape. To prevent erasing a tape
set the write protect switch.

Figure 14- Setting the Write-Protect Switch

Dell LTO Media Handbook Page 23