We just bought a Dell TL2000 Tape Library. I want to buy LTO 5 Ultrium tapes before installing the device. Is anyone can explain the difference between Unlabeled tapes and Labeled? The unit's been delivered with a bunch of Barcoded labels. I am right to believe that i can buy Unlabeled tapes and put a supplied label so the BackUp Exec will read the barcode to identify the media?