Ricoh Aficio MP C3000 Security Guide - Page 119

Preventing Information Leaks Deleting Data on the Hard Disk A Hard Disk The machine's hard disk lets you store data under the copy, printer, fax, scanner, and document server functions, as well as the address book and counters stored under each user code. B Data Not Overwritten in the Hard Disk The machine's memory lets you store fax numbers and data transmitted us- ing the fax function, and network TWAIN scanner. Even if you delete the data 3 on the hard disk, this data remains intact. Overwriting the Data on the Hard Disk To use this function, the optional DataOverwriteSecurity unit must be installed. To prevent data on the hard disk being leaked before disposing of the machine, you can overwrite all data stored on the hard disk. You can also automatically overwrite temporarily-stored data. Note ❒ Depending on the hard disk capacity and the method of erasing the data, this action may take a few hours. Once you start the Erase All Memory function, no other machine operation is possible until the function completes or you quit the function. ❖ Auto Erase Memory Setting To erase selected data on the hard disk, specify [Auto Erase Memory Setting]. ❖ Erase All Memory To erase all the data on the hard disk, using [Erase All Memory]. ❖ Methods of Erasing the Data You can select the method of erasing the data from the following: The default is "NSA". NSA *1 DoD *2 Random Numbers Overwrites the data on the hard disk twice with random numbers and once with zeros. Overwrites the data with a number, its complement, and random numbers, and then checks the result. Overwrites the data with random numbers the specified number of times. You can specify between 1 and 9 as the number of times the data is overwritten with random numbers. The default is 3 times. *1 National Security Agency *2 Department of Defense 110