#PC to Exabyte?
There's a good public domain / freely distributable tape driver in the Unix
Forum here on CIS. There's also a 'tar' there if you need to make a 'tar'
tape. If you really want Abekas format, you might want to purchase commercial
software from a place like Elastic Reality. Several forum members here have
set up this PD tape driver, myself included, so feel free to ask questions.