Intel SRCSAS18E Benutzerhandbuch

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SAS is a serial, point-to-point, enterprise-level device interface that leverages the proven 

SCSI protocol set. SAS is a convergence of the advantages of SATA, SCSI, and FC, and is 

the future mainstay of the enterprise and high-end workstation storage markets. SAS 

offers a higher bandwidth per pin than parallel SCSI, and improves signal and data 

integrity. 

The SAS interface uses the proven SCSI command set to ensure reliable data transfers, 

while providing the connectivity and flexibility of point-to-point serial data transfers. The 

serial transmission of SCSI commands eliminates clock skew challenges. The SAS 

interface provides improved performance, simplified cabling, smaller connectors, lower 

pin count, and lower power requirements when compared to parallel SCSI. 

SAS controllers leverage a common electrical and physical connection interface that is 

compatible with Serial ATA technology. The SAS and SATA protocols use a thin, 7-wire 

connector instead of the 68-wire SCSI cable or 40-wire ATA cable. The SAS/SATA 

connector and cable are easier to manipulate, allow connections to smaller devices, and do 

not inhibit airflow. The point-to-point SATA architecture eliminates inherent difficulties 

created by the legacy ATA master-slave architecture, while maintaining compatibility with 

existing ATA firmware.

Flash ROM/

SAS/SATA Device

32-bit Memory

Address/Data

Bus

PSBRAM/

I

2

C

SAS/SATA Device

SAS/SATA Device

SAS/SATA Device

PCI Express Interface

NVSRAM

I

2

C

Interface

Port 0

Port 1

Port 2

Port 3

SAS/SATA Device

SAS/SATA Device

SAS/SATA Device

SAS/SATA Device

Port 4

Port 5

Port 6

Port 7

PCI Express*

RAID Controller