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10.20.2 Sanitize Device Feature
Sanitize Device Feature Set is a powerful data erase feature. Two data erase features are supported. One is an
Overwrite Ext command, and the other is Crypto Scramble Ext command. Crypto Scramble Ext command can be
supported with a data encryption model only.
Individual Sanitize Device commands are identified by the value specified in the FEATURE field.
The following commands are supported for this feature.
Command
COMMAND field value
FEATURE field value
SANITIZE STATUS EXT
(‘B4’h)
(‘0000’h)
(‘B4’h)
(‘0011’h)
CRYPTO SCRAMBLE EXT
(data encryption model only)
OVERWRITE EXT
(‘B4’h)
(‘0014’h)
SANITIZE FREEZE LOCK EXT
(‘B4’h)
(‘0020’h)
10.20.3 Sanitize Device state machine
Figure 12 describes the operation of the Sanitize Device state machine.
10.20.3.1 SD0: Sanitize Idle State
In SD0: Sanitize Idle state the Sanitize Device state machine is ready for a sanitize operation command or a SANITIZE
FREEZE LOCK EXT command.
This state is entered when the device processes a power-on reset while in the SD1: Sanitize Freeze Lock state or
the SD4: Sanitize Operation Succeeded state.
While in this state, Sanitize Device state machine does not change state if the device processes:
a) a hardware reset or power-on reset
b) a SANITIZE STATUS EXT command
Transition SD0:SD1: If the device processes a SANITIZE FREEZE LOCK EXT command, then the device
transitions to the SD1: Sanitize Frozen state.
Transition SD0:SD2: If the device successfully processes a supported sanitize operation command, then the
device transitions to the SD2: Sanitize Operation state.
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Hard Disk Drive Specification