IBM DTCA-24090 Hard Drive Specifications - Page 86

Security Mode Feature Set

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10.7 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 hard disk device even if the device is removed from the computer. New commands are supported for this feature as below. Security Set Password ('F1'h) Security Unlock ('F2'h) Security Erase Prepare ('F3'h) Security Erase Unit ('F4'h) Security Freeze Lock ('F5'h) Security Disable Password ('F6'h) 10.7.1 Security mode 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. 10.7.2 Security level 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 then only the Master Password with a Security Erase Unit command can unlock the device. Then user data is erased. 10.7.3 Password This function can have 2 types of passwords as described below. Master Password When the Master Password is set, the device does N O T enable the Device Lock Function, and the device can NOT be locked with the Master Password, but the Master Password can be used for unlocking the device locked. 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 next power on reset or hard reset. 78 OEM Specifications of DTCA-2xxxx 2.5 inch H D D

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10.7 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 hard disk device even if the device is removed from the computer.
New commands are supported for this feature as below.
Security Set Password
('F1'h)
Security Unlock
('F2'h)
Security Erase Prepare
('F3'h)
Security Erase Unit
('F4'h)
Security Freeze Lock
('F5'h)
Security Disable Password
('F6'h)
10.7.1
Security mode
Following security modes are provided.
Device Locked mode
The device disables media access commands after power on. Media access com-
mands 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.
10.7.2
Security level
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
then
only the Master
Password with a
Security
Erase
Unit
command
can
unlock the device.
Then user data is erased.
10.7.3
Password
This function can have 2 types of passwords as described below.
Master Password
When the Master Password is set, the device does NOT enable the Device Lock
Function, and the device can NOT be locked with the Master Password, but
the Master Password can be used for unlocking the device locked.
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 next power on reset or hard reset.
78
OEM Specifications of DTCA-2xxxx 2.5 inch HDD