A common utility to perform this copy task is the DD command with the BS=8000 option. This command will block the file while copying it from tape to disk. Later, you can process the transport file from disk.

To copy a file from tape to disk on UNIX: dd if=/dev/tape1 of=tran.dat bs=8000

To copy a file from disk to tape on UNIX: dd if=tran.dat of=/dev/tape1 bs=8000

Note: 'if=' means 'Input File='
'of=' means 'Output File='
'bs=' means 'Block Size='

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