Each item of data is overwritten by a random number, then by its complement, then by another
random number, and 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 method for overwriting is "Random Numbers", and the default number of overwrites is
3.
• NSA stands for "National Security Agency", U.S.A.
• DoD stands for "Department of Defense", U.S.A.
Using Auto Erase Memory
• When Auto Erase Memory is set to [On], temporary data that remained on the hard disk when
Auto Erase Memory was set to [Off] might not be overwritten.
• If the main power switch is turned off before Auto Erase Memory is completed, overwriting will stop
and data will be left on the hard disk.
• Do not stop the overwrite mid-process. Doing so will damage the hard disk.
• If the main power switch is turned off before Auto Erase Memory is completed, overwriting will
continue once the main power switch is turned back on.
• If an error occurs before overwriting is completed, turn off the main power. Turn it on, and then
repeat from Step 1.
• The machine will not enter Sleep mode until overwriting has been completed.
1.
Log in as the machine administrator from the control panel.
2.
Press [System Settings].
3.
Press [Administrator Tools].
4.
Press [ Next] twice.
4. Preventing Leakage of Information from Machines
64
Summary of Contents for PRO C9100
Page 2: ......
Page 8: ...List of Operation Privileges for Address Books 229 INDEX 231 6...
Page 24: ...1 Getting Started 22...
Page 72: ...4 Preventing Leakage of Information from Machines 70...
Page 116: ...5 Enhanced Network Security 114...
Page 176: ...6 Managing the Machine 174...
Page 188: ...7 Troubleshooting 186...
Page 235: ......
Page 236: ...EN GB EN US EN AU M238 1022 2014...