Intel SHG2 - Manual (Page 14)

14 Intel Server Board SHG2 Product Guide
SCSI Controller
The embedded Adaptec AIC-7899W dual function SCSI controller provides Ultra160 (LVDS),
(Ultra 2), and Ultra wide (SE) SCSI interfaces as two independent PCI functions.
The Intel SHG2 baseboard provides active terminators, termination voltage, resetable fuse, and
protection diode for both SCSI channels.
Modular RAID Capable PCI-X Slot 6
The SHG2 server board supports a modular RAID controller, such as the Intel ® RAID Controller
SRCMR, on PCI-X Slot 6. An add-in card installed in this slot leverages the onboard SCSI
controller along with its own built-in intelligence to provide a complete RAID controller subsystem
onboard. If a specified modular RAID card is installed, then SCSI interrupts are routed to the
RAID card instead of the PCI-X interrupt controller effectively hiding the host-based I/O device
from the system. The SHG2 Server Board uses an implementation commonly referred to as
“RAIDIOS” to support this feature.
To use this feature, see “Enabling PCI-X on Slot 6 and Disabling On-board SCSI” on page 90.
For a complete list of qualified add-in cards, see:
http://support.intel.com/support/motherboards/server/SHG2
IDE Controller
The system includes a dual-channel enhanced IDE 32-bit interface controller for intelligent disk
drives with disk controller electronics onboard. The controller has two connectors, Primary and
Secondary, located on the system board, each of which supports a master and a slave device.
The device supports:
• PIO, ATA-100 Synchronous DMA, and bus master IDE transfer modes
• Ultra DMA 33/66/100 synchronous DMA transfers
• Master/slave IDE modes
• Up to four devices
USB Interface
The SHG2 Server Board provides three external USB connectors on the rear I/O panel. The
external connectors are defined by the USB Specification, Revision 1.1. One additional USB
connector is supported internally through a 10-pin header on the server board that can be cabled to
a front panel board. All four ports function identically and with the same bandwidth.