On 11/3/24 18:44, Fred Cisin via cctalk wrote: > On Sun, 3 Nov 2024, Steve Lewis via cctalk wrote: >> Non-descript 5.25 DS/DD (they don't format as 1.2M disk using a 1.2 >> 5.25" >> drive, so I'm pretty sure they are actual 360KB disks). That said, I >> haven't really fully confirmed if it's a 1.2M drive. TEAC FD-55GFR >> 142-U, because I haven't actually come across any 1.2M formatted media. >> I've wondered if maybe one of the heads on the D: drive the Sharp >> PC-5000's >> dual disk drive might have some kind of issue (either the REad or Write >> head, not sure which) - just since it seemed more likely to end up with >> some bad sectors marked when using FORMAT.COM (whereas on other systems, >> the same disk would format fine with no bad sectors). > > Teac FD-55GFR is a 1.2M drive that can also be used as a 720K 5.25" drive. > (FD-55G is 1.2M; FD-55F is 720K)
Just be sure to set the drive jumpers so that the spindle speed is 300 RPM, not 360, which is the usual default for PC drives. --Chuck
