Technical Product Specification

Table Of Contents
Server Management Intel
®
Server Board S5400SF TPS
Revision 2.02
Intel order number: D92944-007
68
4.12 Sensor Data Record (SDR) Repository
The Integrated BMC implements the logical sensor data record (SDR) repository as specified in
the Intelligent Platform Management Interface Specification, Version 2.0. The SDR repository is
accessible via all communication transports. This way out-of-band interfaces can access SDR
repository information evn while the system is down.
The Integrated BMC allocates 65,536 bytes (64 KB) of non-volatile storage space for the SDR.
4.13 Field Replaceable Unit (FRU) Inventory Device
The Integrated BMC implements the interface for logical FRU inventory devices as specified in
the Intelligent Platform Management Interface Specification, Version 2.0. This functionality
provides commands used for accessing and managing the FRU inventory information. These
commands can be delivered via all interfaces.
The Integrated BMC provides FRU device command access to its own FRU device, and to the
FRU devices throughout the server. The FRU device ID mapping for a specific server board is
defined in the appendix. The Integrated BMC controls the mapping of the FRU device ID to the
physical device. In accordance with the IPMI Specification, FRU device 0 is always located on
the server board.
4.14 Non-maskable Interrupt (NMI)
On IA-32 systems, the Integrated BMC has specific monitoring and signal generation
functionality in regards to the NMI signal. When a diagnostic interrupt (also referred to as front
panel diagnostic interrupt or NMI/diagnostic interrupt) is generated by the Integrated BMC, the
actual signal that is pulsed is the NMI signal. A front panel diagnostic interrupt sensor is used to
log SEL events for assertion of the diagnostic interrupt.
4.15 General Sensor Behavior
4.15.1 Sensor Initialization
As part of the Integrated BMC initialization, upon application of standby power or Integrated
BMC reset, the Integrated BMC enables a subset of its sensors. This is done prior to loading
any SDRs. This allows some amount of sensor functionality even if there are no SDRs present.
Subsequent loading of SDRs may change the configuration of these sensors.
The sensors that are enabled independently of an SDR load include processor status sensors.
4.15.2 Sensor Re-arm
All sensors (manual and auto re-arm) that show an asserted event status generate a de-
assertion SEL event when the sensor is re-armed, provided that the associated SDR is
configured to enable a de-assertion event for that condition. This applies regardless of whether
the sensor is re-armed by an IPMI command, the Integrated BMC Initialization agent, or due to
sensor-specific re-arm trigger events (for instance, insertion of a hot-swap fan should re-arm an
associated manual re-arm fan tach sensor). This behavior applies regardless of whether the
sensor is a threshold/analog sensor or a discrete sensor.