Master Password Revision Code; Table 52: Initial Setting - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

User Password
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. Otherwise, the default master password which
is set by Hitachi Global Storage Technologies can unlock a device that is locked with a user password

11.9.4 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. Values 0000h and FFFFh are reserved.
11.9.4.1 Master Password setting
The system manufacturer or dealer can set an initial Master Password using the Security Set Password command,
without enabling the Device Lock Function.
11.9.4.2 User Password setting
When a User Password is set, the device will automatically enter lock mode the next time the device is powered on.

Table 52: Initial setting

Set Password with 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 the next power on reset or hard reset.
< Setting password >
POR
Normal operation
Power off
POR Device locked mode
Travelstar 4K120 Hard Disk Drive Specification
< No setting password >
POR
Normal operation
Power off
POR
Device unlocked mode
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