>> assumes you're going for 1.4, attempts
it, and fails.  You can choose /f:720
 >> with later versions of DOS; use "/t:80 /n:9" for 3.x.
 >/F:2 would also work for some versions.
 >With XP, /T:80/N:9 seems to be the only way that still works! 
On Wed, 19 Jan
2005, Dwight K. Elvey wrote:
  Hi Fred
  Are you using a fresh disk or one that has already been
 formatted once before? I've seen it do this as well
 but never explored it much to see if a blank disk would
 still work. 
blank, new, used,...
In XP, it gave an "unrecognized switch/option" type message for
ALL of the possible ways to format a 720K EXCEPT "/T:80 /N:9"
When formatting from the "desktop", the only choice for disk type was 1.4