Functional Architecture; Sas Buses; Sas Backplane; Full-Duplex Serial Mode Operation - Intel S7000FC4UR Technical Product Specification

SAS Backplane

7.2.1.6 System Fan Control
The two fan assemblies are controlled by system fan control.
7.2.1.7 Power Functions
The last main functions for the system provided by the SAS backplane are as follows:
Power connector for tape and DVD/CD Drive
Power
7.3

Functional Architecture

This section provides a more detailed architectural description of the SAS backplane's
functional blocks.
7.3.1

SAS Buses

The SAS buses are directly connected to the server board via the SAS RAID controller card that
is plugged into a PCI-Express* slot on the server board. As a result, the SAS RAID controller
provides all SAS functionality and interfacing to the SAS backplane.
7.3.2 SAS Backplane
The SAS backplane routes data to/from each of the eight internal SAS drives from/to the SAS
controller on the adapter card. Data movement between the SAS drives on the SAS backplane
and the SAS controller is achieved through two high-speed SAS cables. These cables connect
the PCI-Express* card to the SAS backplane.
There are a total of eight separate SAS buses or lanes. These buses are contained within the
two high-speed cables. A Molex* SFF 8086 mini connector (or Molex* SFF 8484 x SFF 8086*)
is used to terminate each end of the cable assembly to the SAS adapter card and the SAS
backplane.
7.3.3

Full-duplex Serial Mode Operation

Each SAS lane operates in full-duplex serial mode. In addition, each lane contains dedicated
transmit and receive differential pairs. The combination creates a total of four differential pairs
on each of the two cables that routes data directly to the eight SAS drives that are attached to
its ports.
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Intel® Server System S7000FC4UR
Revision 1.0