X ero x 4 5 95 Co pi e r/P ri n te r S y s t em Ad m i ni s t rat i on G ui d e 8-718 . S e t upsNOTE 1: The data on the hard disk is erased by overwriting it onetime. However, overwriting the data three times ensures that thedata cannot be recovered. The three times overwrite processdoes take a longer amount of time to perform than the one timeoverwrite process.NOTE 2: During the overwriting process, normal operations mayrun slower than normally.For information about how to check the status during theoverwriting process, refer to the section entitled "Overwriting theHard Disk" in Chapter 10 of the User Guide.Data Encryption (optional)KEY POINT: This is an optional accessory and may be purchasedat an additional cost to the customer. For more information,contact the Customer Support Center.If you want the recorded data on the hard disk encrypted, selectOn as the default setting for this feature. By switching on the dataencryption, all data written to the hard disk is automaticallyencrypted. Encryption prevents unauthorized access to the storeddata. When encryption is on, an encryption key must be set.KEY POINT 1: Do not forget the encryption key! The data cannotbe restored if you forget the encryption key.KEY POINT 2: A service representative can block changes to thesettings of this feature. For more information about settings, referto Service Representative Operation Limit page 73.If the optional Data Encryption feature is available for yourmachine, use the following procedure for creating an encryptionkey.1. Select Data Encryption.2. Select On.