To mark a
file or
disk so that its contents cannot be modified or
deleted. When you want to make sure that neither you nor another
user can destroy
data, you can write-protect it. Many
operating systems include a
command to write-protect files. You can also write-protect 5¼-inch
floppy disks by covering the
write-protect notch with tape. 3½-inch floppy diskettes have a small
switch that you can set to turn on write-protection.
Write-protected files and media can only be read; you cannot write to them, edit them, append data to them, or delete them.