The documentation says 9, but the logical format only shows 128 byte sectors from 1-64, not 1-72. Did it have 9 sectors and the 9th was just not read/written from?
logical format 40 tracks, 1 side, 64 sectors, 128 bytes per sector (40*1*64*128 = 327680 bytes = 320K)
TF-20/TF-15 40 tracks, 2 sides, 16 sectors, 256 bytes per sector (40*2*16*256 = 327680 bytes = 320K)
PF-10 40 tracks, 2 sides, 8 sectors, 512 bytes per sector (40*2*8*512 = 327680 bytes = 320K) <--- what I think it should be
PF-10 40 tracks, 2 sides, 9 sectors, 512 bytes per sector (40*2*9*512 = 368640 bytes = 360K) <--- what the PF-10 manual says
The logical format is what the computer uses to talk to the drive with over the serial protocol...
logical format 40 tracks, 1 side, 64 sectors, 128 bytes per sector (40*1*64*128 = 327680 bytes = 320K)
TF-20/TF-15 40 tracks, 2 sides, 16 sectors, 256 bytes per sector (40*2*16*256 = 327680 bytes = 320K)
PF-10 40 tracks, 2 sides, 8 sectors, 512 bytes per sector (40*2*8*512 = 327680 bytes = 320K) <--- what I think it should be
PF-10 40 tracks, 2 sides, 9 sectors, 512 bytes per sector (40*2*9*512 = 368640 bytes = 360K) <--- what the PF-10 manual says
The logical format is what the computer uses to talk to the drive with over the serial protocol...