HGST Ultrastar 7K4000 (SAS) Hard Disk Drive Specification
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they are not mentioned in the table below.
Table 252: TCG Enterprise SSC Commands Behavior
Command Description unlocked Locked
Session Management There are two types of sessions:
1) Read-Only session
2) Read-Write session.
The SSC requires us to support Read-
Write sessions. Read-Only session is not
allowed. A session is always initiated by
the host.
See the “Write” parameter in the StartSes-
sion method description @ TCG Core
5.2.3.1, and see SSC requirement in SSC
6.2.1.2.
Properties
Returns session properties to host
.
N/A N/A
StartSession Start a session N/A N/A
SycSession Response to say session successfully started.
N/A N/A
CloseSession End (Close) a session N/A N/A
Command Description unlocked Locked
Discovery Allows the host to discover a TCG drive,
its properties, and table values.
Level 0 Discovery request sent by host as IF-RCV
command. Security Protocol = 0x01,
COMID=0x0001
N/A N/A
Level 1 Request basic TPER capabilities via prop-
erties using host messaging.
Uses properties
method
.
Uses properties
method.
Level 2
TCG methods retrieve table cell val-
ues.
See methods
below.
See methods below.
Command Description unlocked Locked
Cryptographic Tem-
plate
Random function is only function
required under SSC
Random This is the only required method in the
crypto template for SSC. It is a random
number generator in software.
N/A - Not related
to bands/data on
drive. Authentica-
tion required.
N/A - Not related to
bands/data on drive.
Authentication
required.
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