How to: Format a 5.25 inch high-density (1.2 MB) diskette in DOS.
Solution:
Format the disk from the DOS prompt:
1) Click the 'Start' button to display the 'Start' menu.
2) Select 'Programs' and select 'MS-DOS Prompt'. (The 'MS-DOS Prompt' window appears.)
3) Type the following at the DOS prompt and press ENTER:
FORMAT <drive>: /F: 1.2
(where <drive> is the letter assigned to the appropriate floppy drive).
4) (Optional) Type a label for the diskette and press ENTER.
5) (Optional) Type Y and press ENTER to format another diskette.
6) Type N and press ENTER to return to the DOS prompt.
7) Type the following and press ENTER:
EXIT
