On Sun, 1 Dec 2019, dwight via cctalk wrote:
Don't 8 inch drives have 77 tracks?
YES.
Although 8" "emulation" sometimes cheats and uses 80.
And some users with drives without a physical stop tried to squeeze a few
more tracks (and 41,42 on 360K)
The inability to read those "extra" tracks on a different drive didn't
show up until the disk was nearly full (inner tracks are normally last
allocated)
SA400 was 35 track (TRS80, and SA390 Apple)
Q: how many tracks are the HP formats?