Specifications

QSSC-S4R Technical Product Specification Main Board Server Management
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3.2.3 Hardware Monitoring Block Diagram
Figure 12. Hardware Monitoring Block Diagram
3.2.4 Sensor Data Record SDR (SDR) Repository
The BMC implements a logical Sensor Data Record (SDR) repository device. The SDR repository is accessible via all
communication transports, even while the system is powered off.
3.2.5 Field Replaceable Unit (FRU) Inventory Devices
The BMC implements the interface for logical FRU inventory devices. This functionality provides commands used for
accessing and managing FRU inventory information. These commands can be delivered via all interfaces. The BMC
provides FRU command access to its own FRU device, as well as to the FRU devices throughout the system. The FRU
device ID mappings and SMBus addresses are shown in Table 8. The BMC controls the mapping of the FRU device ID
to the physical device. Per the IPMI specification, FRU device 0 is always located on the main board. All Intel-designed
server boards maintain onboard non-volatile storage to hold the FRU data.
Table 8. FRU Device Location and Size
FRU Device
ID
I
2
C Bus I
2
C Addr 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 A1 RW 256
03 1 A2h Memory Riser Board A2 RW 256
04 1 A4h Memory Riser Board B1 RW 256
05 1 A6h Memory Riser Board B2 RW 256
06 1 A0h Memory Riser Board C1 RW 256
07 1 A2h Memory Riser Board C2 RW 256
08 1 A4h Memory Riser Board D1 RW 256
09 1 A6h Memory Riser Board D2 RW 256
0A 4 AAh Power Distribution Board RW 256
0B 4 A0h Power Supply 1 RO 256
0C 4 A2h Power Supply 2 RO 256
0D 4 A4h Power Supply 3 RO 256