Specifications

Processor Presence and Population Check QSSC-S4R Technical Product Specification
262
regardless of the system power state The BMC allocates 65,519 bytes of non-volatile storage space for the SDR. See
Table 44 for SDR command support.
24.7.1 SDR Repository Erasure
SDR repository erasure is a background process. After initiating erasure with the Clear SDR Repository command,
additional Clear SDR Repository commands must be executed to get erasure status and determine when the SDR
repository erasure is completed. This may take several seconds. The SDR repository cannot be accessed or modified
until the erasure is completed.
24.7.2 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 or on a system boot, it scans the SDR
repository and configures the IPMB devices that have management controller records and the Init Required bit set in
their SDR repository. 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. For details on the initialization agent, refer to the Intelligent
Platform Management Interface Specification Second Generation v2.0.
24.8 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 FRU device ID mapping is defined in the table 7. The BMC controls the mapping of the FRU device ID to the
physical device.
24.8.1 BMC FRU Inventory Area Format
See the Platform Management FRU Information Storage Definition, Version 1.0.
The BMC provides only low-level access to the FRU inventory area storage. It doesnot validate or interpret the data
that is written. This includes the common header area. Applications cannot relocate or resize any FRU inventory areas.
Note: Fields in the internal use area are not for OEM use. Quanta reserves the right to relocate and redefine these
fields without prior notification. Definition of this area is part of the software design. The format in the internal use area
may vary with different BMC firmware revisions.
24.8.2 BMC FRU ID Mapping
Table 176. FRU Device ID Map
FRU Device ID
I
2
C Bus I
2
C Addr C
FRU Hardware
Device
R/W
FRU Size (in
Bytes)
00 1 AAh Baseboard RW 8192
01 1 ACh IO Riser Board RW 8192
02 1 A0h
Memory Riser
Board A
RW 256
03 1 A2h
Memory Riser
Board B
RW 256
04 1 A4h
Memory Riser
Board C
RW 256
05 1 A6h
Memory Riser
Board D
RW 256