IBM IC35L040AVVN07-0 Hard Drive Specifications - Page 96

Security Mode Feature Set

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9.8 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 a hard disk drive even if the device is removed from the computer. The following commands are supported for this feature: Security Set Password Security Unlock Security Erase Prepare Security Erase Unit Security Freeze Lock Security Disable Password ('F1'h) ('F2'h) ('F3'h) ('F4'h) ('F5'h) ('F6'h) 9.8.1 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. 9.8.2 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. 9.8.3 Passwords This function can have the two kinds of passwords described below: Master Password When the Master Password is set, the device does NOT enable the Device Lock Function and the device cannot 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. Deskstar 120GXP hard disk drive specifications 82

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9.8 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 a hard disk drive even if the device is removed from the computer.
The following commands are supported for this feature:
('F6'h)
Security Disable Password
('F5'h)
Security Freeze Lock
('F4'h)
Security Erase Unit
('F3'h)
Security Erase Prepare
('F2'h)
Security Unlock
('F1'h)
Security Set Password
9.8.1 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 de-
vice lock function, set/change password. The device enters this mode via
a Security Freeze Lock command. It cannot quit this mode until power off.
9.8.2 Security level
The following security levels are provided:
High level security
When the device lock function is enabled and the User Password is for-
gotten, the device can be unlocked via a Master Password.
Maximum level security
When the device lock function is enabled and the User Password is for-
gotten, only the Master Password with a Security Erase Unit command
can unlock the device. User data is then erased.
9.8.3 Passwords
This function can have the two kinds of passwords described below:
Master Password
When the Master Password is set, the device does NOT enable the
Device Lock Function and the device cannot 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.
Deskstar 120GXP hard disk drive specifications
82