Apple Macintosh 6500 - Manual (Page 132)

Your Macintosh can’t read a floppy disk.
If you see a message that a floppy disk is unreadable, try one of the following:
m If the disk has never been used, you may simply need to initialize it—that
is, prepare it for use. For instructions, see the “Disks” topic area of
Macintosh Guide (or Mac OS Guide), available in the Guide (h) menu.
m The disk may be damaged. See “Testing and Repairing a Damaged Disk”
later in this chapter for information on testing and repairing disks.
m The disk may have been formatted for use on another kind of computer.
You may be able to use an application that lets you work with such disks on
your Macintosh.
If you are trying unsuccessfully to use a DOS floppy disk, consider the
following:
m When formatting floppy disks on a DOS computer for use in a Macintosh,
you need to format standard double-sided disks as 720K disks and high-
density disks as 1440K disks. Double-sided disks formatted in 1440K
format and high-density disks formatted in 720K format may not work in
a Macintosh.
If you think your DOS floppy disk might have a format that doesn’t work
in a Macintosh, use a DOS computer to copy the contents of the disk onto
a properly formatted disk.
m Make sure the PC Exchange control panel is in the Control Panels folder
(available in the Apple [K] menu) and that it is turned on. To turn on PC
Exchange, open the Extensions Manager control panel and click the PC
Exchange item (under the Control Panels heading) to make a checkmark
appear. Then restart your computer.
132 Chapter 9