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Configuration and Initialization Intel® Server Board SE7501WV2 TPS
Revision 1.0
Intel reference number C25653-001
48
• A scatter/gather mechanism that supports both DMA and PIO IDE drives
• Support for ATA proposal PIO Mode 0, 1, 2, 3, 4, DMA Mode 0, 1, 2, and Ultra DMA
Mode 0, 1, 2, 3, 4, 5
• An IDE drive transfer rate capable of up to 100 MB/sec per channel
• A host interface that complies with PCI Local Bus Specification, Revision 2.2
• 32-bit, 33-MHz bus speed and 132 MB/sec sustained transfer rate
The Promise* PDC20277 supports IDE RAID through dual ATA-100 Channels. In a RAID
configuration, multiple IDE hard drives are placed into one or more arrays of disks. Each array is
seen as an independent disk, though the array may include upwards of two, three, or four
drives. The IDE RAID can be configured as following:
• RAID 0 – striping one to four drives
• RAID 1 – mirroring two drives
• RAID 1 + spare drive (three drives)
• RAID 0 + one to four drives are required
RAID 0 configurations are used for high performance applications, as it doubles the sustained
transfer rate of its drives. RAID 1 configurations are primarily used for data protection to create
an identical drive backup to a secondary drive. Whenever a disk write is performed, the
controller sends data simultaneously to a second drive located on a different data channel. With
four drives attached to dual ATA-100 channels, two striped drive pairs can mirror each other
(RAID 0+1) for storage capacity and data redundancy.
4.9 Video Controller
The SE7501WV2 server board provides an ATI Rage XL PCI graphics accelerator, along with 8
MB of video DDR 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 a 100 Hz vertical refresh rate.
The SE7501WV2 server board provides a standard 15-pin VGA connector and supports
disabling of the on-board video through the BIOS setup menu or when a plug-in video card is
installed in any of the PCI slots.
4.9.1 Video 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.