It has been suggested that old lower density floppies can be used on
later drives........dont do it!
It works just well enough to get you into trouble!
Reading is not the problem, it is writing. Drives with more cyliders
have thinner data tracks and on a lower format will leave more vacant
magnetic real-estate. This is a drama if there is data in this space
and you try to read the floppy on a lower density drive, or another
high density drive with slightly different alignment. I may be
talking BS here when it comes to 720Kb drives.... most of my bad
experience is with 360K disks in 1.2 Mb drives.
Kali--
http://www.nimnet.asn.au/~kali