tpcp [-b blocksize] in out
where "in" is the input, which may be either a disk file or a tape device. Similarly "out" may be either a file or a tape device.
If the input is a file and the output is a tape device, the "-b" flag should be used to set the block size of write operations.
Tape-to-tape copy: tpcp /dev/nrst0 /dev/nrst1 Tape-to-disk copy: tpcp /dev/nrst0 data.fits Disk-to-tape copy: tpcp -b 2880 data.fits /dev/nrst0