Apple Macintosh PowerBook 150 - Manual (Page 138)

A dialog box appears in which you can specify the disk’s name and format.
2 Type a name for the disk.
3 Choose the disk format you want from the Format pop-up menu.
The list of available formats varies depending on your disk drive and the
capacity of the disk. Choose DOS if you plan to use the disk on both
Macintosh and DOS computers.
4 Click Erase (or Initialize).
If you’re initializing a disk, an alert box appears. Click the Continue button.
The Macintosh prepares the disk in the format you chose.
Usually it takes less than a minute to initialize or erase a floppy disk.
However, if portions of the disk have been damaged, the initialization process
may take several minutes.
If you changed the disk’s format, the disk’s icon will change when you
reinsert the disk.
130 Appendix B