Noel Chiappa wrote: > > 9-track tapes on the PDP-10 used one of the following encodings: > > What about 7-track, any idea? I would assume 6 x 6-bit tape frames per > 36-bit word, but that's just a guess.
A reasonable guess, and one I'd make too. But I don't know either. Supposedly, many ITS backups were made to 7-track tapes. That became a problem when the old tape drives started to fail, and available new tape drives were only 9-track.
