A/UX® System Administrator's Reference Sections 1M, 7, and 8

diskformat(1M) diskformat(lM)
3
Writing to a floppy disk previously fonnatted under the
Macintosh Operating System, using utilities such as tar and
epio, destroys any previously recorded Macintosh data and programs.
Before a diskformat operation is started, the device is accessed
in exclusive-use mode. This prevents anyone from formatting
the media in a drive already being used, or prevents anyone
from using the device while it is formatting media.
The default formatting density chosen in the absence of the dens
and head options is determined by the floppy device driver based
on the floppy-device device file specified, the type of floppy drive,
and the media inserted. See f d(7) for details.
February, 1990
RevisionC