CA BrightStor ARCserve Backup uses LTO4 tape library as the backup device ; FC (optical fiber) or SAS method, these two ways (FC or SAS way), does backup software need more corresponding module?

The connection mode of the tape library is not related to the software license, whether FC or SAS is the default support;
License is related to the number of drives in the library, more than one drive, you need to configure the Tape Library Option support;
Multiple servers are connected to the tape library through the SAN architecture and require Lan-free ? high-performance backups based on SAN, they also need to support SAN function options.
One server, one single drive library, the function module is unnecessary.