Excellent news.
There are three basic drive types, the 400k, the 800k and the 1440k drive.
The 400k drive needed a special motor signal to spin the disk at different speeds in order to put more sectors on the tracks depending on how close to the spindle or the edge the track was. This signal was generated by the computer in the same way as classic macs did the sound.
The 800k and 1440k drives did away with this motor signal requirement where the drive itself determine the motor speed depending on the track number, and in the case of 1440k, the type of disk.
Later Macintoshes stopped generating the motor signal, for example the Macintosh Classic uses the motor signal mechanism to drive the screen brightness instead. My external 800k drive still works on my Classic.