On Wed, 27 Nov 2019, Arthur Krewat wrote: [...] > Very odd circumstance, but block size has a lot to do with trying to > read tapes. QIC-150, 8mm, 9-track, I've run into it a lot. Yep; you tended to use the biggest block size you could, in order to cut down on the number of inter-record gaps (and of course, efficiency). -- Dave