this is from the tsm 4.2 Technical Guide Redbook (SG24-6277-00); it should
be your case, if you have W2k TSM servers. otherwise refer to the library
sharing paragraph in the same redbook.problem is, this way you can't
Disaster Recovery; if you need two different physical environments, things
get much more complicated.


7.4 SCSI tape failover (W2K only)

Tivoli Storage Manager supports Microsoft Cluster Services (MSCS) in a
Microsoft
Datacenter Server operating environment. However, MSCS does not support the
failover of
tape devices. When correctly set up, TSM servers in a cluster can now
support SCSI tape
failover over a shared SCSI bus.
The server cluster uses and is limited to two computers. The computers must
be physically
connected to each other and must exclusively share a SCSI bus to which the
tape devices
are attached. When failover occurs, the remaining TSM server issues a SCSI
bus reset
during initialization, which allows the server to acquire the tape devices.
See Tivoli Storage
Manager for NT Administrator's Guide, GC35-0410-01.

and then it goes on.

Cordiali saluti
Gianluca Mariani
 Tech Support SSD
Via Sciangai 53, Roma
 phones : +39(0)659664598
                   +393351270554 (mobile)
gianluca_mariani AT it.ibm DOT com