Most likely, the 3-mode drive. 8x1024 sectors on each
track, giving a
capacity of about 1.23MB. Many PCs of the era could also handle the
drives, which would change spindle speed from 300 to 360 RPM. 3 mode
drives were manufactured right up until the end, but usually were
configured as 2-mode (720/1.44) unless jumpering changes were made to
the drive.
Chuck,
Yes, R. Stricklin (Bear) verified it as such. So have you ever seen a Tri
Density drive? Or was it just a paper announcement that never made it out of
the lab? I'd figure if anyone may have seen one it would be you ;)
-Ali