Hi, we have a STK9740 with 9840B FC drive...we had to up the code to 2.4.01 or 2.1.04... The small red/black cable on the tray had also to be swapped around for the 9740 to see the 9840B Fc drives. I am sure it is possible for the 9940B drives to work... to do with firmware levels... will find out more as well.
Translated from Spanish to English: please read below:
"The Solaris environment, consisting of two Sun Fire 25,000 with a total of 72 processors each running Solaris 9 and 10, and partitioned into 26 domains, employing Veritas NetBackup Enterprise Server 6.0 against a local StorageTek L180 library with four drives fiber LTO-Ultrium SCSI robotics and control with 100 GB and 100 tapes in the Windows environment, running Windows 2003 Server Enterprise Edition SP1, was used by his party Veritas NetBackup 5.0, with one backup server with two HBAs interconnected to a switch Brocade SilkWorm-3200 and from there to four LTO drives in a StorageTek L180 library with 70 tapes of 200 Gb Additionally, shared with the mainframe, the SSSS was also a remote StorageTek TimberWolf 9740 library with two native units 9940B FC and 100 tapes of 200 Gb partition controlled exploitation on z / OS.