Note

Some program diskettes, such as your MS-DOS diskettes, have no notch so they are permanently write-protected. This protects them from being accidentally erased or altered.

On a 3½-inch diskette, the write-protect device is a small switch on the lower-right comer on the back, shown below. To write-protect a 3½-inch diskette, slide the switch toward the edge of the diskette until it clicks into position, exposing a hole in the comer.

Write Protect

Figure 3-7. 3½” Diskette & Write-Protect SW

To remove the write protection, slide the switch toward the center of the diskette so the hole is covered.

Making Backup Copies

It is important to make copies of all your data and system diskettes. Copy all diskettes that contain programs, such as the original MS-DOS diskettes that come with your computer, and use only the copies. Store your original MS-DOS diskettes in a safe place away from your working copies. Backup your data diskettes regularly, whenever you revise them, to keep them up-todate, and store them away from your originals.

Using Your Computer 3-15