BSF

The BSF primary command moves the tape backwards a specified number of files.
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Syntax

        .-1---------.   
>>-BSF--+-+-------+-+------------------------------------------><
          '-files-'     

For example, the command BSF 3 moves the tape backward 3 files.

You can only use BSF with Tape Browse (option 4.1) and Tape Update (option 4.3).

Note: You can also use Backward Space File (option 4.15.1).