> based on what ive seen, the barcode does matter a
> great deal.

Todays libraries are capable of holding many media types at one time. DLT,
LTO, LTO-2, 9X40, etc, etc. The library (StorageTek libraries as an example)
use the 7th digit of a volser as a media qualifier. This is a hardware
function of the library to prevent the wrong media  into a drive. A LTO tape
may go into a SuperDLT320, but it won't come out...

It is critical that the correct labels are ordered for media when using a
library. Older libraries could be "faked out" with barcode rules in
NetBackup but newer libraries will fail the mount.

Just my 2 cents...

Brian Stewart

Systems Specialist, Technical Support
VERITAS Certified Professional
SUN Certified Network Administrator
StorageTek Canada Inc.
brian_stewart AT storagetek DOT com
Phone (905) 212-4918
Fax (905) 602-6010