Password; Master Password Revision Code - Hitachi 7K100 - Travelstar - Hard Drive Specifications

11.9.3 Password

This function can have two types of passwords as described below.
Master Password
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, if the User Password is forgotten, no
one can unlock a device that is locked with the 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. 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.
Set Password with User 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 locked device.
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 7K100 Hard Disk Drive Specification
< No setting password >
Normal operation
POR
Figure 2: Initial setting
75
POR
Power off
Device unlocked mode