Integrated Trusted Platform Module (Tpm); Light Path Diagnostics - IBM System x3850 X5 Implementation Manual

Using all of the features of UEFI requires an UEFI-aware operating system and adapters.
UEFI is fully backward-compatible with BIOS.
For more information about UEFI, see the IBM white paper, Introducing UEFI-Compliant
Firmware on IBM System x and BladeCenter Servers, which is available at the following
website:
http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5083207
For UEFI menu setup, see 6.9, "UEFI settings" on page 259.

3.13.5 Integrated Trusted Platform Module (TPM)

The Trusted Platform Module (TPM) in the x3850 X5 is compliant with TPM 1.2. This
integrated security chip performs cryptographic functions and stores private and public
secure keys. It provides the hardware support for the Trusted Computing Group (TCG)
specification.
Full disk encryption applications, such as the BitLocker Drive Encryption feature of Microsoft
Windows Server 2008, can use this technology. The operating system uses it to protect the
keys that encrypt the computer's operating system volume and provide integrity
authentication for a trusted boot pathway (such as BIOS, boot sector, and others). A number
of vendor full-disk encryption products also support the TPM chip.
The x3850 X5 uses the light path diagnostics panel's Remind button for the TPM Physical
Presence function.
For details about this technology, see the Trusted Computing Group (TCG) TPM Main
Specification at the following website:
http://www.trustedcomputinggroup.org/resources/tpm_main_specification
For more information about BitLocker and how TPM 1.2 fits into data security in a Windows
environment, go to the following website:
http://technet.microsoft.com/en-us/windows/aa905062.aspx

3.13.6 Light path diagnostics

Light path diagnostics is a system of LEDs on various external and internal components of
the server. When an error occurs, LEDs are lit throughout the server. By viewing the LEDs in
a particular order, you can often identify the source of the error.
The server is designed so that LEDs remain lit when the server is connected to an ac power
source but is not turned on, if the power supply is operating correctly. This feature helps you
to isolate the problem when the operating system is shut down.
Chapter 3. IBM System x3850 X5 and x3950 X5
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