The contemporary computer to receive the old SGI's files needs to have
a file system which is compatible with the SGI's file system, and the
TSM client needs to be programmed to handle that, where you would use
the Virtualnodename option in conjunction with the old SGI's client
password to access its data.  The first command you should then
perform is 'dsmc query filespace' to verify what's there, and then
drill into it with 'dsmc query backup'.  Whereas SGI has been
discontinued as a supported platform in the latest TSM clients, you
may need to use an older client level, like 5.1.

   Richard Sims    http://people.bu.edu/rbs/