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10.21.15 Error Codes
All error codes are compliant with the TCG Core specification and SIIS, except in the following case:
• The maximum sessions allowed at any single time is 1. When a session is active and a new session is
requested, the drive answers the host with SP_BUSY, instead of NO_SESSIONS_AVAILABLE.
10.21.16 Life Cycle Model
A Life Cycle model for TCG is able to combine TCG and BDE (with ATA security feature) features in a single code
and to switch back and forth between TCG and BDE modes. The Life Cycle model based on TCG Core specification
[1] and TCG Opal SSC specification [4] is applied to TCG Enterprise.
10.21.16.1
Switching between TCG Enterprise and ATA-Security
Modes (ATA-Security Mode, formerly known as BDE-
Mode)
Note: This section covers certain capabilities of the new generation of Western Digital Ultrastar Enhanced Drive
Security products that is not commonly needed for typical use-cases.
The new generation of Western Digital Ultrastar Enhanced Drive Security products support ATA-Security (on SATA
products) and TCG Enterprise SSC in a single drive, right out of the box. The drives support the ATA-Security and
TCG interactions in accordance with the SIIS specification.
The factory default state of the drive is in ATA-Security SEC-1 state (which is ATA-Security DISABLED state), in this
state, the drive can be either used/as an ATA-Security or TCG device.
Once a drive is personalized or configured for use in ATA-Security mode (e.g.: Set USER or MASTER PASSWORD
ENABLED (SEC-4) state or LOCKED (SEC-5) state, etc.), all TCG LockingSP/Band operations will be
blocked. Similarly, once a drive is personalized for use in TCG mode (e.g.: BANDMASTER / ERASEMASTER PIN
changed/personalized, BANDs created, etc.), all ATA-Security operations will be blocked.
While there are ways to put the drive in its factory default state, the below list mechanism could be used to quickly
put the drive in factory default state (from ATA-Security mode or TCG-mode).
10.21.16.1.1
TCG-Mode (TCG personalized state)
To revert the drive back to factory default state from TCG-mode, perform TCG Revert operation (see TCG commands section for details).
IMPORTANT NOTE: All the data on the drive will be lost.
10.21.16.1.2 ATA-Security Mode (ATA-Security personalized state)
To revert the drive back to factory default state from ATA-Security mode, perform SECURE ERASE UNIT command
or put the drive in SEC-1 state (using DISABLE PASSWORD command)
10.21.16.2 ATA Security Feature Management
Command execution for ATA security feature is corresponded to TCG Life Cycle model (active or inactive), and for
Trusted Receive command, Trusted Send command and those subcommands are depended on ATA security status.
When TCG Enterprise is activated, the ATA security feature set is the same as not supported. And when the ATA
security feature set is enabled, TCG Enterprise cannot be activated.
The values to set to Identify Device information are modified corresponding to ATA security status and TCG Life Cycle
model.
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Hard Disk Drive Specification