Overwriting Data on the Hard Disk

You can prevent data leakage by automatically overwriting temporarily saved data (Auto Erase Memory) or overwriting all the data stored on the hard disk (Erase All Memory).

For details, see the manual supplied with the Data overwrite security unit.

Auto Erase Memory Setting

To erase data on the hard disk by job type, specify [Memory Erase].

Erase All Memory

To erase all the data on the hard disk at once, specify [Erase All Mem.].

Methods of Erasing the Data

You can select the method of erasing the data from the following:

The default is "NSA".

NSA

(National Security Agency)

Overwrites the data on the hard disk twice with random numbers and once with zeros.

DoD

(Department of Defense)

Overwrites the data with a number, its complement, and random numbers, and then checks the result.

Random

Overwrites the data with random 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.

Depending on the amount of data and the erasure method, full erasure might take several hours.
Once in progress, the Erase All Memory function can be paused, but not stopped. No other operations are possible until all data is erased.
Even if there is still hold print, stored print, confidential print, or test print data remaining on the hard disk, the "No Remaining Data" overwrite icon will be lit after erasure is completed.