Hitachi HTS541640J9SA00 manual Security Mode Feature Set, Security mode, Security Level, Password

Travelstar 5K160 (SATA) Hard Disk Drive Specification

12.8.6S.M.A.R.T operation with power management modes

The device saves attribute values automatically on every head unload timing except the emergency unload, even if the attribute auto save feature is not enabled. The head unload is done not only by Standby, Standby Immediate, or Sleep command, but also by the automatic power saving functions like ABLE-3 or Standby timer. So basically it is not necessary for a host system to enable the attribute auto save feature, when it utilizes the power management. If the attribute auto save feature is enabled, attribute values will be saved after 30minutes passed since the last saving, besides above condition.

12.9 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)

12.9.1Security 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
Device Unlocked mode	erase unit command.
	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
Device Frozen mode	security erase unit command.
	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.

12.9.2Security Level

Following security levels are provided.

High level security	When the device lock function is enabled and the User Password is
Maximum level security	forgotten the device can be unlocked via a Master Password.
	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.

12.9.3Password

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
User Password	locked.
	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. If Software Setting
	Preservation is disabled, the device is locked on COMRESET as well.

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