Konica Minolta bizhub C250P - Manual (Page 66)

Administrator Operations 2
C250P 2-49
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Chapter 2
2.8 Overwrite All Function
When access to the Admin. Setting mode by the Administrator of the ma-
chine via the control panel is authenticated, the machine enables setting of
the operation of the Overwrite All function.
When the machine is to be discarded, or use of a leased machine is termi-
nated at the end of the leasing contract, the Overwrite All 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 da-
ta. For details of items that are cleared by the Overwrite All function, see
“Types of Data Cleared by Overwrite All Data Function” on page 1-12.
The HDD Overwrite Method offers the choice of eight different modes,
“Mode 1” through “Mode 8.” Overwrite All takes about less than one hour in
“Mode 1” at the minimum and about 9 hours in “Mode 8” at the maximum.
Mode Description
Mode 1 Overwrites once with 0x00.
Mode 2 Overwrites with random numbers → random numbers → 0x00.
Mode 3 Overwrites with 0x00 → 0xff → random numbers → verifies.
Mode 4 Overwrites with random numbers → 0x00 → 0xff.
Mode 5 Overwrites with 0x00 → 0xff → 0x00 → 0xff.
Mode 6 Overwrites with 0x00 → 0xff → 0x00 → 0xff → 0x00 → 0xff → random
numbers.
Mode 7 Overwrites with 0x00 → 0xff → 0x00 → 0xff → 0x00 → 0xff → 0xaa.
Mode 8 Overwrites with 0x00 → 0xff → 0x00 → 0xff → 0x00 → 0xff → 0xaa → ver-
ifies.
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