Intel SDS2 Ultra160 Scsi, Video Controller, Video Modes, Zero Channel RAID ZCR Capable PCI Slot

I/O Subsystem Intel® Server Board SDS2

4.1.2.4Zero 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.

4.2Ultra160 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.

4.3Video 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.

4.3.1Video 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.

14	Revision 1.2
Order Number:	A85874-002