IBM DJSA-210 Hard Drive Specifications - Page 96

Security Mode, 8.3 Password, 8.4 Master Password Revision Code, 8.5 Operation example

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11.8.1 Security Mode Following security modes are provided. Device Locked Mode Device Unlocked Mode Device Frozen 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. 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. 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. 11.8.2 Security level Following security levels are provided. High level security Maximum level security When the device lock function is enabled and the User Password is 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. 11.8.3 Password This function can have two types of passwords as described below. Master Password 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. The system manufacturer/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 IBM can unlock a device that is locked with a user password. 11.8.4 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. 11.8.5 Operation example 11.8.5.1 Master Password setting The system manufacturer/dealer can set a new Master Password from default Master Password using the Security Set Password command, without enabling the Device Lock Function. Travelstar 32GH/30GT/20GN hard disk drive specifications 82

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11.8.1 Security Mode
Following security modes are provided.
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.
Device Frozen 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 Unlocked 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 Locked Mode
11.8.2 Security level
Following security levels are provided.
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.
Maximum level security
When the device lock function is enabled and the User Password is forgotten
the device can be unlocked via a Master Password.
High level security
11.8.3 Password
This function can have two types of passwords as described below.
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.
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.
Master Password
The system manufacturer/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 IBM can unlock a device that is locked with a user password.
11.8.4 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.
11.8.5 Operation example
11.8.5.1 Master Password setting
The system manufacturer/dealer can set a new Master Password from default Master Password using the
Security Set Password command, without enabling the Device Lock Function.
Travelstar 32GH/30GT/20GN hard disk drive specifications
82