System Board Interconnects; Mid-Plane; Figure 21. Passive Mid-Plane Board - Intel SR1500 - AXXMINIDIMM DDR-2 RAID Controller Cache Memory Manual

4BSystem Board Interconnects
5.

System Board Interconnects

The chassis incorporates several design changes from the previous generation Intel 2U server
chassis, resulting in improved cable routing. System boards within the chassis include the mid-
plane, bridge board, hot-swap backplane, and control panel. This chapter describes the
interconnect features of each, and defines the pin-outs for each of their connectors. Functional
details of each system board are described in later chapters.
5.1

Mid-plane

The mid-plane is new to this generation of Intel high density server platforms. Its design and
use, along with that of the bridgeboard and hot-swap backplane, improve cable routing within
the system. The mid-plane is the key system board of the chassis. It serves as the primary
interface between the server board, hot-swap backplane, and control panel. Two mid-planes are
offered for this chassis: a passive SATA/SAS, and an active SAS/SAS RAID.
The passive midplane is a simple pass through from the backplane to the SATA connectors on
the baseboard or SAS/SATA connectors on an add-in card.
The following diagram shows the location for each connector found on the passive mid-plane
board.
A Power Connector
B Fan 6 Connector
C Fan 5 Connector
D SAS/SATA Connectors
E Bridge Board Connector
28
C
B
D
A
E
J

Figure 21. Passive Mid-plane Board

Intel order number D31980-009
Intel® Server System SR2500AL
F
G
H
I
AF000047
F Fan 4 Connector
G Fan 3 Connector
H Fan 1 Connector
I Fan 2 Connector
J Backplane Connector
Revision – 1.6