Tape Drive Compatibility

I'm in a quandry...  I have a tape device that comes up as a 9348.  I have
another tape device on the same 400 that is a IBM 7208-002.  I am want to
write a tape on the 9348 and read it on the 7208. (Don't ask why, its just a
test for a real move from one 400 to another).   I am INZTAPing the tape on
the 9348 as *FMT2GB.  When I try to DSPTAP on the 7208, all I get is a
message "cannot process volume".  I've made sure the physical tape is fine
and have written/read to each drive individually.  (SAVLIB'S, not compressed
or compacted, if that matters).

Am I missing something or is this just not possible.  Help???

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