Tivoli is going to deliver Check Sum support in a future release.  But, you
have no way to read the tape back to verify the tape is good based on my
understanding of the solution provided.  The checksum is verified during the
restore process or a copy from one storage pool to another.  So, if you
create a primary tape and then perform a backup command against the storage
pool it is in to create another copy I suspect the checksum will be checked.

If you use a high end drive there is parity and checksum already built in.