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

System Board Interconnects

5. System Board Interconnects
The system incorporates several design changes from the previous generation Intel 1U server
chassis, resulting in improved cable routing or eliminating several cable interconnects altogether.
System boards within the chassis include two types of mid-planes, a bridge board, a hard drive
backplane, three types of PCI riser boards, and three types of control panels. 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 system. Its design and use
along with that of the bridge board and hot-swap backplane, improve cable routing or eliminate
several cable interconnects within the system. The mid-plane serves as the primary interface
between the server board, backplane, and control panel. Two mid-planes are offered for this
system: a cabled passive point-to-point SATA/SAS, and an active SAS/SAS RAID.
The following diagram shows the location for each connector found on the passive mid-plane
board.
The system also supports an active SAS / SAS RAID mid-plane. This system board
incorporates an LSI* LSISAS1068 SAS controller onto the board. See Chapter 6 for details
describing SAS / SAS RAID support. The following diagram shows the location for each
connector found on this board.
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Figure 21. Passive Mid-Plane Board

Intel order number D31982-006
Intel® Server System SR1550AL
Revision – 1.3