Before installing software, make sure the cartridge is write-protected. Two icons
on the switch indicate the write-protect status. An orange rectangle is visible
when the switch is in the write-protect position. If you do not see an orange
rectangle, slide the switch toward the label slot.
After you insert a write-protected cartridge into the drive, the orange indicator
light comes on. Your system recognizes the tape as being write-protected under
any one of these conditions.
• The write-protect switch on the cartridge is set to the write-protect position.
• An operating system command write-protected the tape.
• A tape recorded on a TK50 drive is inserted into the drive.
Removing write-protection depends on how the tape was recorded and how it is
write-protected.
• You cannot write-enable a tape recorded on a TK50 drive by moving the
write-protect switch on the cartridge or by using software commands.
• The TK70 drive recognizes a tape recorded on a TK50 drive as write-
protected.
To remove write-protection on tapes recorded on a TK70 drive:
• If the cartridge is write-protected by the write-protect switch on the cartridge
and not by a software command, moving the switch to the write-enabled
position causes the orange light to go out at the end of the executing
command.
• If the cartridge is write-protected by a software command and not by the
write-protect switch, removing the operating system restriction causes the
orange light to go out.
• If the cartridge is write-protected by the switch on the cartridge and a
software command, you must change the switch setting and remove the
operating system restriction.
When you use a CompacTape II cartridge to make a backup copy of files:
• Make sure the orange write-protect light on the TK70 drive is off.
• If the light is not off, check for any of the write-protect conditions listed above.
• Change the switch setting and/or operating system restriction as necessary.
Do not begin your operation until the orange light goes off.
3–28 Operating the System Options
