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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
2
C logic
FRU device ID accessed through a private I
2
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
2
C devices during intrachassis
communications. “Dumb” I
2
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
2
C server management interface
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