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Peripheral and Hard Drive Sub-System Intel® Server System SR2500AL

Revision – 1.00

Intel order number D31980-004

5.4 Mid-plane Options

New to this generation of high density server platform is the concept of the mid-plane. The mid-

plane is the interconnect between the server board and both the hot-swap backplane and

control panel. It is also used to determine which hard drive technology is to be supported. Two

different Mid-plane options are available for this platform 1) a passive mid-plane capable of

supporting SATA ports from the server board or SAS using ports from an add-in card; 2) an

active SAS / SAS RAID mid-plane. This section will describe the hard drive interface support of

each of the mid-plane boards.

5.4.1 Passive Mid-plane

The passive mid-plane is used as an interconnect, routing drive control signals from either the

on-board SATA ports of the baseboard or SAS/SATA ports from an add-in card to the hot-swap

backplane. The hard drive controller signals are cabled to the mid-plane which then routes the

signals to the hot-swap backplane through two edge connectors that plug directly into it. See

Table 22. Mid-plane-to-Backplane Card Edge Connector #1 Pin-out and Table 23. Mid-plane-to-

Backplane Card Edge Connector #2 Pin-out.

AF000047

Figure 32. Passive Mid-plane Board

A Power Connector F Fan 4 Connector

B Fan 6 Connector G Fan 3 Connector

C Fan 5 Connector H Fan 1 Connector

D SAS/SATA Connectors I Fan 2 Connector

E Bridge Board Connector J Backplane Connector

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Intel SR2500 Scheda Tecnica Pagina 58