Write Protection; Cleaning The Mo Disk; Cleaning Your Drive - Fujitsu DynaMO 640 FE Benutzerhandbuch

3.3 Write Protection

Enabling the write protection on the MO disk prevents the data from being
accidentally lost or altered.
The write protect switch located on the bottom of the MO disk. See figure
below. Move the write protect switch up for "write enable" or down for "write
protect".

3.4 Cleaning the MO Disk

From time to time, dust may build up on the surface of the disk and cleaning of
the disk may be necessary.
It is recommended to clean MO disks every three months so that you can use
your DynaMO at a stable performance for at least five years in normal office
environments. Use the officially offered MO disk cleaning kit (part number
CA90003-0702) or any MO disk cleaning kit on the market for the cleaning.

3.5 Cleaning Your Drive

The cleaning of the head may be required every three months so that you can
use the DynaMO at a stable performance for at least five years in normal office
environments.
To clean the objective lens, insert the optional head cleaner (part number
CA90002-C980). Cleaning will take place automatically, and the head cleaner
will be ejected after 15-30 seconds.
Please contact your place of purchase for information on the MO lens cleaning
kit.
Write enable
Write protect
1.17