Control column in Device Monitor

Netbackup 7.0.1

Windows Server 2008 R2

Within the Device Monitor is a column called Control and within that column I have 2 types of statuses, 1) RESTART 2) TLD. and when I click on the TLD I get a list of drives/tapes(?) that say the same thing. What do I need to do to get these drives ACTIVE so I can utilize all my tape drives.

Tell me what additional information you  require to assist you with my issues.

thanks!