IBM NETVISTA X40 6643 - Manual (Page 36)

Write-protecting diskettes
It is possible to accidentally format a diskette or unintentionally write data to
it. Important information can be written over or lost. For this reason, it is a
good idea to write-protect important diskettes. You can read data from a
write-protected diskette, but you cannot erase or change the data.
Most 3.5-inch diskettes have a write-protect switch that can be used to prevent
data from being written to or erased from the diskette. If a 3.5-inch diskette
does not have a write-protect switch, it is permanently write-protected.
A write-protect switch is located on the back of 3.5-inch diskettes.
Write-protect
switch
v To allow writing to the diskette, slide the switch so that the write-protect
window is covered.
v To prevent writing to the diskette, slide the switch so that the write-protect
window is open.
20 User Guide