Erasing Hdd Securely; Erasing Sram Securely; Clearing Service Tech Password - Toshiba e-STUDIO477S Service Manual

[F] Erasing HDD securely (Erase HDD Securely)
This function is used when installing Data Overwrite Enabler (GP-1070) or before discarding the HDD.
It overwrites all the used areas on the HDD with the selected data, and makes it unusable.
After selecting this function, specify the level below to be overwritten.This setting is the overwriting
method complying with DoD 5220.22-M.
1. LOW (Normally use this setting.)
This is the standard overwriting method.
"00-FF-Random-Verify" Once
2. MEDIUM
This overwriting method is more secure than LOW. The erasing time is between LOW and HIGH.
"00-FF-Random" three times repeatedly -Verify
3. HIGH
This is the most secure overwriting method. It takes the longest time to erase data.
"00-FF-Random" five times repeatedly -Verify
4. SIMPLE
This is the simple overwriting method. It takes the shortest time to erase data.
Overwrite the Random data once
Key in the level number to display "<" next to it.
(At this time, if "0" is entered, the screen returns to the initial one of the Assist Mode.)
Press the [START] button to display the reconfirmation screen, and then press the [START] button
again to start overwriting.
Notes:
When this operation has been done, do not perform SRAM data formatting (Clear SRAM) before
the normal start-up.
[G] Erasing SRAM securely (Erase SRAM Securely)
This function is used before discarding the SRAM board (for the SYS board).
It overwrites all the used areas on the SRAM board with the selected data, and makes it unusable.
Immediately after selecting this function, the processing starts and is completed.
[H] Clearing service tech password (Clear Service Tech)
This function is needed after the HDD is replaced.
When the HDD is replaced, the service tech password stored in the new one is set as a blank.
Therefore, its password is copied to the SRAM board so that both passwords become the same with
this function. The setting is enabled when the equipment is started up in the normal mode after
performing this function.
e-STUDIO477S/527S/477SL
SELF-DIAGNOSTIC MODE
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