Hitachi HTS541040G9AT00 Specifications - Page 170

The Revision Code field is set with Master password. If Identifier is User, the Revision Code is

Page 170 highlights

Security Level A zero indicates a High level, a one indicates a Maximum level. If the host sets the High level and the password is forgotten then the Master Password can be used to unlock the device. If the host sets the Maximum level and the user password is forgotten, only a Security Erase Prepare/Security Unit command can unlock the device and all data will be lost. Password The 32 bytes are always significant in the text of the password. Master Password Revision Code The Revision Code field is set with Master password. If Identifier is User, the Revision Code is not set. The Revision Code field is returned in Identify Device word 92. The valid Revision Codes are 0000h to FFFDh. The Default Master Password Revision Code is FFFEh. The code FFFFh is reserved. The setting of the Identifier and Security level bits interact as follows: Identifier = User / Security level = High The password supplied with the command will be saved as the new user password. The security mode feature (lock function) will be enabled from the next power on. The drive may then be unlocked by either the user password or the previously set master password. Identifier = Master / Security level = High This combination will set a master password but will NOT enable the security mode feature (lock function). Identifier = User / Security level = Maximum The password supplied with the command will be saved as the new user password. The security mode feature (lock function) will be enabled from the next power on. The drive may then be unlocked by only the user password. The master password previously set is still stored in the drive but may NOT be used to unlock the device. Identifier = Master / Security level = Maximum This combination will set a master password but will NOT enable the security mode feature (lock function). Travelstar 5K100 Hard Disk Drive Specification 156

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Travelstar 5K100 Hard Disk Drive Specification
156
Security Level
A zero indicates a High level, a one indicates a Maximum level. If the host sets the High level and the password is
forgotten then the Master Password can be used to unlock the device. If the host sets the Maximum level and the
user password is forgotten, only a Security Erase Prepare/Security Unit command can unlock the device and all
data will be lost.
Password
The 32 bytes are always significant in the text of the password.
Master Password Revision Code
The Revision Code field is set with Master password. If Identifier is User, the Revision Code is not set. The Revi-
sion Code field is returned in Identify Device word 92. The valid Revision Codes are 0000h to FFFDh. The Default
Master Password Revision Code is FFFEh. The code FFFFh is reserved.
The setting of the Identifier and Security level bits interact as follows:
Identifier = User / Security level = High
The password supplied with the command will be saved as the new user password. The security mode feature
(lock function) will be enabled from the next power on. The drive may then be unlocked by either the user
password or the previously set master password.
Identifier = Master / Security level = High
This combination will set a master password but will NOT enable the security mode feature (lock function).
Identifier = User / Security level = Maximum
The password supplied with the command will be saved as the new user password. The security mode feature
(lock function) will be enabled from the next power on. The drive may then be unlocked by only the user pass-
word. The master password previously set is still stored in the drive but may NOT be used to unlock the
device.
Identifier = Master / Security level = Maximum
This combination will set a master password but will NOT enable the security mode feature (lock function).