Dell PowerEdge R320 User's Guide download pdf (Page 46)

PCI Riser Board

The PCI riser board supports the following features:

• One Server I/O Hub (SIOH) component of the E8870 chip set

• One P64H2 component

• Three non-hot-plug PCI slots

 One 64-bit, 133-MHz PCI-X, full length

 Two 64-bit, 100-MHz PCI-X, full-length

• One integrated D2D

• Server management logic

• I

C logic

 FRU device ID accessed through a private I

C bus

 Temperature sensor

SCSI Backplane Board

The SCSI backplane board communicates with the main board via a 68-pin SCSI cable and a flex

cable. It contains two industry-standard 80-pin Single Connector Attachment (SCA)-2 connectors

for hot-swap hard drives. Ultra320 or lower SCSI technology SCA type hard drives can be

installed in this carrier. The backplane board accepts hard drives up to 15,000 RPM.

The features supported by the SCSI backplane board include the following:

• Monitoring the SCSI bus for enclosure services messages and acting on them appropriately.

Examples of such messages include: activate a drive fault indicator, power down a drive that

has failed, and report SCSI backplane temperature.

• SAF-TE intelligent agent, which acts as proxy for “dumb” I

C devices during intrachassis

communications. “Dumb” I

C devices are those that have no bus mastering capability.

NOTE

Because all hard drives have different cooling, power and vibration

characteristics, Intel validates specific hard drive types in the system.

The SCSI backplane provides three main functions for the system:

• Passes the SCSI signals between the main board and the SCSI drives

• Provides hooks for enclosure management

• Provides an I

C server management interface

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Dell PowerEdge R320 User's Guide Page 46