Dirty
This icon is lit when there is temporary data to be overwritten, and
blinks during overwriting.
Clear This icon is lit when there is no temporary data to be overwritten.
• The Data Overwrite icon will indicate "Clear" when there is a Sample Print/Locked Print/Hold Print/
Stored Print job.
• If the Data Overwrite icon is not displayed, first check if Auto Erase Memory has been set to Off. If
the icon is not displayed even though Auto Erase Memory is On, contact your service representative.
Methods of Overwriting
You can select a method of overwriting from the following:
• NSA*1
Temporary data is overwritten twice with random numbers and once with zeros.
• DoD*2
Temporary data is overwritten with a fixed value, the fixed value's complement, and random numbers.
It is then verified.
• Random Numbers
Temporary data is overwritten multiple times with random numbers. The number of overwrites can be
selected from 1 to 9. The default is 3 times.
*1
National Security Agency, U.S.A.
*2
Department of Defense, U.S.A.
• Default: Random Numbers
Using Auto Erase Memory
This can be specified by the machine administrator.
For details about logging on and logging off with administrator authentication, see "Logging on Using
Administrator Authentication", "Logging off Using Administrator Authentication".
5. Protecting Information Transmitted Through the Network or Stored on the Hard Disk from Leaks
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