Functional Architecture

Intel® Server Board SE7520JR2

3.4.6.1SATA RAID

The Intel® RAID Technology solution, available with the 82801ER ICH5 R (ICH5R), offers data striping for higher performance (RAID Level 0), alleviating disk bottlenecks by taking advantage of the dual independent SATA controllers integrated in the ICH5R. There is no loss of PCI resources (request/grant pair) or add-in card slot.

Intel RAID Technology functionality requires the following items:

•ICH5-R

•Intel RAID Technology Option ROM must be on the platform

•Intel® Application Accelerator RAID Edition drivers, most recent revision

•Two SATA hard disk drives

Intel RAID Technology is not available in the following configurations:

•The SATA controller in compatible mode

•Intel RAID Technology has been disabled

3.4.6.2Intel® RAID Technology Option ROM

The Intel RAID Technology for SATA Option ROM provides a pre-OS user interface for the Intel RAID Technology implementation and provides the ability for an Intel RAID Technology volume to be used as a boot disk as well as to detect any faults in the Intel RAID Technology volume(s) attached to the Intel RAID controller.

3.4.7Video Support

The Server Board SE7520JR2 provides an ATI* Rage XL PCI graphics accelerator, along with 8 MB of 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. One 2Mx32 SDRAM chip provides 8 MB of video memory.

The SVGA subsystem supports a variety of modes, up to 1600 x 1200 resolution in 8/16/24/32 bpp modes under 2D, and up to 1024 x 768 resolution in 8/16/24/32 bpp modes under 3D. It also supports both CRT and LCD monitors up to 100 Hz vertical refresh rate.

Video is accessed using a standard 15-pin VGA connector found on the back edge of the server board. Video signals are also made available through either of two control panel connectors allowing for an optional video connector to be present on the platform’s control panel. Video is routed to the rear video connector by default. Circuitry on the baseboard disables the rear video connector when a monitor is plugged in to the control panel video connector. “Hot plugging” the video while the system is still running, is supported.

On-board video can be disabled using the BIOS Setup Utility or when an add-in video card is installed. System BIOS also provides the option for dual video operation when an add-in video card is configured in the system.

3.4.7.1Video Modes

The Rage XL chip supports all standard IBM VGA modes. The following table shows the 2D/3D modes supported for both CRT and LCD.

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