Intel SDS2 User Manual download pdf (Page 28)

I/O Subsystem Intel® Server Board SDS2

Revision 1.2

Order Number: A85874-002

4.1.2.4 Zero Channel RAID (ZCR) Capable PCI Slot 6

The SDS2 Server Board supports zero-channel RAID controller on PCI Slot 6. This add-in card

leverages the on-board SCSI controller along with its own built-in intelligence to provide a

complete RAID controller subsystem on-board. If a specified zero-channel RAID card is

installed, then SCSI interrupts are routed to the RAID card instead of PCI interrupt controller and

the host-based I/O device is effectively hidden from the system. The SDS2 Server Board uses

an implementation commonly referred to as “RAIDIOS” to support this feature.

Note: Zero Channel Raid Cards (ZCR) cards are only supported on PCI slot 6.

Note: Intel zero channel raid cards SRCMR and SRCMRU are not supported on SDS2.

4.2 Ultra160 SCSI

The SDS2 Server Board provides an embedded dual-channel SCSI bus through the use of the

Adaptec*’s AIC-7899W SCSI controller. The AIC-7899W controller contains two independent

SCSI controllers that share a single 64-bit, 66-MHz PCI bus master interface as a multifunction

device, packaged in a 456-pin BGA. Internally, each controller is identical, capable of operations

using either 16-bit SE or LVD SCSI providing 40 MBps (Ultra-wide SE), 80 MBps (Ultra 2), or 160

MBps (Ultra160). Each controller has its own set of PCI configuration registers and SCSI I/O

registers. The SDS2 Server Board supports disabling of the on-board SCSI controller through

the BIOS setup menu.

The SDS2 Server Board provides active terminators, termination voltage, re-settable fuse, and

protection diode for both SCSI channels. The SCSI BIOS setup menu (CNTRL-A) provides the

ability to enable or disable the on-board terminators for both channels A and B.

4.3 Video Controller

The SDS2 Server Board provides an ATI* RAGE XL PCI graphics accelerator, along with video

SDRAM and support circuitry for an embedded SVGA video subsystem. The ATI* RAGE XL chip

contains a SVGA video controller, clock generator, 2D and 3D engine, and RAMDAC in a 272-pin

PBGA. Two 2 MB SDRAM chips provide 4 MB of video memory. The SVGA subsystem supports

a variety of modes, up to 1024 x 768 resolution in 8/16/24/32 bpp modes under 2D and up to 800

x 600 resolution in 8/16/24/32 bpp modes under 3D. It also supports both CRT and LCD

monitors at up to 100 Hz vertical refresh rate. The SDS2 Server Board provides a standard 15-

pin VGA connector.

4.3.1 Video Modes

The RAGE XL chip supports all standard IBM* VGA modes. The following table shows the 2D/3D

modes supported on the CRT. The table specifies the various display resolution, refresh rates

and color depths supported.

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Intel SDS2 User Manual Page 28