>Do you mean SAN Library Sharing between multiple TSM Servers
>of SAN Library Sharing between other programs?

Per the Redpaper cited below:
"Sharing of the IBM 3494/3590 Tape Library does not require nor use the Tivoli
 Storage Manager 3.7 tape library sharing support." ...
"The 3494 does not require and is not supported by Tivoli Storage Manager 3.7
 library sharing because the 3494 has its own library manager and does not
 support SCSI commands for library control."

From my ADSM functional directory:

3494, partition/share                   TSM SAN tape library sharing support is
                                        only for libraries that use SCSI
                                        commands to control the library robotics
                                        and the tape management. This does *not*
                                        include the 3494, which uses network
                                        communication for control. Sharing of
                                        the 3494/3590s thus has to occur via
                                        conventional partitioning or dynamic
                                        drive sharing (which is via the
                                        Auto-Share feature introduced in 1999).
                                        There is no dynamic sharing of tape
                                        volumes: they have to be pre-assigned to
                                        their separate TSM servers via Category
                                        Codes.
                                        Ref: Redpaper "Tivoli Storage Manager:
                                        SAN Tape Library Sharing".
                                        Redbook "Guide to Sharing and
                                        Partitioning IBM Tape Library Data"
                                        (SG24-4409)

  Richard Sims, BU