Writing files from Unix to 3480 Tape

I am trying to learn what command I would need to enter to tell my very old tape writer to write a large > 210 MB file from a UNIX box to 3480 tapes. I can get a single tape to write < 210 MB but if the file is large I am not aware of what command to enter to tell it to split the input file across multiple volumes.

Any help would be greatly appreciated.
Thanks