13.8.1 Security mode
The following security modes are provided:
Device Locked mode
The device disables media access commands after power on. Media
access commands are enabled by either a security unlock command or
a security erase unit command.
Device Unlocked mode
The device enables all commands. If a password is not set this mode is
entered after power on, otherwise it is entered by a security unlock or a
security erase unit command.
Device Frozen mode
The device enables all commands except those which can update the
device lock function, set/change password. The device enters this mode
via a Security Freeze Lock command. It cannot quit this mode until
power off.
13.8.2 Security level
The following security levels are provided:
High level security
When the device lock function is enabled and the User Password is
forgotten, the device can be unlocked via a Master Password.
Maximum level security
When the device lock function is enabled and the User Password is
forgotten, only the Master Password with a Security Erase Unit
command can unlock the device. User data is then erased.
13.8.3 Passwords
This function can have two kinds of passwords as described as follows:
Master Password
When the Master Password is set, the device does NOT enable the
Device Lock Function and the device can NOT be locked with the Master
Password, but the Master Password can be used for unlocking the
device locked.
Identify Device Information word 92 contains the value of the Master
Password Revision Code set when the Master Password was last
changed. Valid values are 0001h through FFFEh.
User Password
The User Password should be given or changed by a system user.
When the User Password is set, the device enables the Device Lock
Function and the device is then locked on next power on reset or hard
reset.
The system manufacturer or dealer who intends to enable the device lock function for end-users must set
the master password even if only single level password protection is required.
13.8.4 Operation example
13.8.4.1 Master Password setting
The system manufacturer or dealer can set a new Master Password from default Master Password using
the Security Set Password command without enabling the Device Lock Function.
The Master Password Revision Code is set to FFFEh as shipping default by the drive manufacturer.
Deskstar 60 GXP Hard disk drive specification
83
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