Intel® 5000 Series Chipsets Server Board Family Datasheet System Management
Revision 1.1
Intel order number D38960-004
111
4.9 Sensor Data Record (SDR) Repository
The 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 while the system is down.
The BMC allocates 65,536 bytes (64 KB) of non-volatile storage space for the SDR.
4.9.1 Initialization Agent
The BMC implements the internal sensor initialization agent functionality specified in the
Intelligent Platform Management Interface Specification, Version 2.0. When the BMC initializes
upon a system boot, it scans the SDR repository and configures the IPMB devices that have
management controller records. This includes setting sensor thresholds, enabling or disabling
sensor event message scanning, and enabling or disabling sensor event messages.
The initialization process causes those IPMB micro-controllers to rearm their event generation.
In some cases, this causes a duplicate event to be sent to the BMC. The BMC’s mechanism to
detect and delete duplicate events should prevent any duplicate event messages from being
logged.
4.10 Field Replaceable Unit (FRU) Inventory Device
The 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 BMC provides FRU device command access to its own FRU device, and to the FRU
devices throughout the server. The 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.
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