MAXDATA FUSION 6000 I, Системное руководство

Страница: 26 / 31

26
Description
ATA-100
The MAXDATA Fusion 6000 System board provides an embedded dual channel ATA-100
bus through the use of the Promise Technology PDC20267 ASIC. The PDC20267 ATA-100
controller contains two independent ATA-100 channels that share a single 32-bit, 33-MHz
PCI bus master interface as a multifunction device, packaged in a 128-pin PQFP.
The ATA-100 controller supports the following features:
• The scatter/gather mechanism supports both Direct Memory Access (DMA) and Pro-
grammable I/O (PIO) IDE drives and ATAPI devices.
• Support for ATA and ATAPI proposal PIO Mode 0, 1, 2, 3, 4, DMA Mode 0, 1, 2, and
Ultra DMA Mode 0, 1, 2, 3, 4, 5.
• The IDE drive transfer rate is capable of up to 100 MB/sec per channel.
• The host interface complies with PCI Local Bus Specification Revision 2.2.
• 32-bit, 33-MHz bus speed and 132 MB/sec sustained transfer rate.
The Promise PDC20267 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 follows:
• 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 primarily used for data protection. It creates
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.
Video Controller
The MAXDATA Fusion 6000 System board 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. Four 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.
The MAXDATA Fusion 6000 System 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 the AGP slot or any of the PCI slots.