Good point, thanks.
I conclude that for a multi-platform environment, TSM for SAN is required
for all systems that need LAN-free data movement.
Another vague issue for me is the shared resource. Evidently, tape libraries
could be shared SAN resources. How about disk-based ones? What I have found
is that disk-based resources could be shared using some products such as
GPFS (for AIX and linux), Tivoli SANergy or IBM Totalstorage SAN Filsysetem.
How TSM server defines storage pools on a shared disk or filesystem?

Thanks.