Konica Minolta bizhub C650 bizhub C650 Security Operations User Manual - Page 86
Overwrite All Data Function
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Administrator Operations Chapter 2 Administrator Operations 2 2.12 Overwrite All Data Function When access to the Administrator Settings by the Administrator of the machine via the control panel is authenticated, the machine enables setting of the operation of the Overwrite All Data function. When the machine is to be discarded, or use of a leased machine is terminated at the end of the leasing contract, the Overwrite All Data function overwrites and erases all data stored in all spaces of the HDD. The function also resets all passwords saved in the NVRAM to factory settings, preventing leak of data. For details of items that are cleared by the Overwrite All Data function, see "Types of Data Cleared by Overwrite All Data Function" on page 1-10. The HDD Overwrite Method offers the choice of eight different modes, [Mode 1] through [Mode 8]. Overwrite All Data takes about less than one hour in [Mode 1] at the minimum and about 9 hours in [Mode 8] at the maximum. 2.12.1 Mode Mode 1 Mode 2 Mode 3 Mode 4 Mode 5 Mode 6 Mode 7 Mode 8 Description Overwrites once with 0x00. Overwrites with random numbers → random numbers → 0x00. Overwrites with 0x00 → 0xff → random numbers → verifies. Overwrites with random numbers → 0x00 → 0xff. Overwrites with 0x00 → 0xff → 0x00 → 0xff. Overwrites with 0x00 → 0xff → 0x00 → 0xff → 0x00 → 0xff → random numbers. Overwrites with 0x00 → 0xff → 0x00 → 0xff → 0x00 → 0xff → 0xaa. Overwrites with 0x00 → 0xff → 0x00 → 0xff → 0x00 → 0xff → 0xaa → verifies. Setting the Overwrite All Data function 2 Note When the main power switch is turned off, then on again, wait at least 10 seconds to turn it on after turning it off. if there is no wait period between turning the main power switch off, then on again, the machine may not function properly. Here is the sequence, through which the main power switch and sub power switch are turned on and off: Turn off the sub power switch → Turn off the main power switch → Turn on the main power switch → Turn on the sub power switch Do not leave the machine with the setting screen of Administrator Settings left shown on the display. If it is absolutely necessary to leave the machine, be sure first to log off from the Administrator Settings. C650 2-71