Travelstar 5K160 (PATA) Hard Disk Drive Specification
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12.8
Security Mode Feature Set
Security Mode Feature Set is a powerful security feature. With a device lock password, a user can prevent
unauthorized access to hard disk device even if the device is removed from the computer.
New commands are supported for this feature as below.
Security Set Password
('F1'h)
Security Unlock
('F2'h)
Security Erase Prepare
('F3'h)
Security Erase Unit
('F4'h)
Security Freeze Lock
('F5'h)
Security Disable Password
('F6'h)
12.8.1 Security mode
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.
12.8.2 Security Level
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 then only the Master Password with a Security Erase Unit
command can unlock the device. Then user data is erased.
12.8.3 Password
This function can have 2 types of passwords as described below.
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.
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
then the device is locked on next power on reset or hard reset.
The system manufacturer/dealer who intends to enable the device lock function for the end users, must set the
master password even if only single level password protection is required. Otherwise, if the User Password is
forgotten then no one can unlock the device which is locked with the User Password.
12.8.4 Master Password Revision Code
This Master Password Revision Code is set by Security Set Password command with the master password. And this
revision code field is returned in the Identify Device command word 92. The valid revision codes are 0001h to
FFFEh. The default value of Master Password Revision Code is FFFEh.
Value 0000h and FFFFh is reserved.
12.8.5 Operation example
12.8.5.1 Master Password setting
The system manufacturer/dealer can set a initial Master Password using the Security Set Password command,
without enabling the Device Lock Function.
