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Error Codes
All error codes are compliant with the TCG Core specification and SIIF, 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.
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.
Switching Between TCG Enterprise and BDE Modes
The switching feature is managed by the Life Cycle model.
TCG / BDE combined code switches back and forth between TCG Enterprise mode and BDE mode by invoking
TCG Method (Activate / Revert). Switching from BDE mode to TCG Enterprise mode is executed by “Activate
method with SID”. And switching from TCG Enterprise mode to BDE mode is executed by “Revert method with
SID”. AdminSP is working even if the drive is under BDE mode, and LockingSP is enabled when the drive is under
TCG mode.
Activate method
BDE TCG Enterprise
Revert method
BDE TCG Enterprise
Host can execute Activate and Revert methods like other TCG methods.
Both Activate and Revert methods initialize TCG setting.
When the TCG / BDE combined drive is switched to another mode, it regenerates Encryption Key. That is,
encrypted user data becomes to garbage data.
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.
Customer Specific Requirements
This specification does not cover customer-specific requirements. Customer-specific requirements are submitted
by the customer to WDC in the form of a customer-specification document.
Switching Between TCG Enterprise and ISE Model
The SED model includes TCG/ISE switchable model.
A Life Cycle model for TCG is able to combine TCG and ISE (with ATA security feature) features in a single code
and to switch back and forth between TCG and ISE modes. The Life Cycle model based on TCG Core specification
[1] and TCG Opal SSC specification [4] is applied to TCG Enterprise.
The switching feature is managed by the Life Cycle model.
TCG / ISE combined code switches back and forth between TCG Enterprise mode and ISE mode by TCG
operation. Ship ISE mode as default. Switching from ISE mode to TCG Enterprise mode is executed by
“Authenticate BandMasterN or EraseMaster”. And switching from TCG Enterprise mode to ISE mode is executed by
“Revert method with PSID”. AdminSP is working even if the drive is under ISE mode, and LockingSP is enabled
when the drive is under TCG mode.
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Western Digital Ultrastar DC HC310 SATA Product Manual