Fujitsu DynaMO 640FE Guide D'utilisation page 23

2) Insert the MO disk.
3) Type in the volume name for your MO disk.
4) Check Extended Format Type check box if necessary.
5) Check Physical Format check box if necessary. Physical formatting is
not mandatory and can take up to 15 minutes depending on media
capacity. Physical formatting is only required for older/heavily used or
corrupted disks.
6) Click Initialize button to begin initialization. The following
confirmation screen will appear.
7) Click OK to start initialize the MO disk.
The MO disk is ready to use. The MO icon will appear on the desktop.
1.20
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Important:
Formatting will delete all existing data on the MO disk.
Notice:
Although all the messages of the installer are displayed
in English, you can use the DynaMO in a non-English
environment without any problems.