This project was developed from scratch...
And as such has behavior that is not identical, or even close to the origional tcopy command.
The origional has now been posted at tcopy-linux project on sourceforge - I suggest using that project
The initial release of the Linux version of tcopy is now available for download. The tcopy command is an AIX utility to clone tapes. Many people in the seismic data processing industry found this to be an invaluable utility, both for cloning tapes, but also diagnosing problem tape.