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ASUS PCI-DA2100 Application Note
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Chapter 1 Introduction of ASUS-DA2100 PCI-SCSI Controller
1.1 Product Description
The ASUS PCI-DA2100 is a PCI-to-SCSI RAID controller. Specifically designed to
provide RAID 0,1,3,5 capability to any host system equipped with PCI Local Bus
interface. All the RAID functions of ASUS PCI-DA2100 are performed by 486 CPU
coupled with high speed DRAM and firmware in Flash Memory. In effect, it endows
the host system with the high performance and fault tolerant disk storage operation
of RAID technology. It is also an idea solution for weaving several hard disks into
one contiguous volume.
1.2 Features
£ »Support RAID levels:
RAID Levels
Method Descriptions
Non-RAID
Disk Spanning
RAID 0
Striping
RAID 1
Mirroring
RAID 3
Block Striping with Dedicated Parity
RAID 5
Multi Block Striping with Distributed Parity
£ »Failure management capability:
Automatic bad sector reassignment
Hot-swapping
Spare drive operation (Global Spare and Local Spare)
Background rebuilding
£ »PCI Rev. 2.1 compliance
£ »Up to 15 SCSI IDs per channel
£ »Up to 8 logical drives, each with independent RAID modes.
£ »Dynamic mapping of LUMs to logical drives. Two or more LUNs can be mapped to
the same logical drive for redundant host operation.
£ »Allow adjustment of delay prior to first disk access during controller initial to
enhance compatibility with slow-initial drives.
£ »All channels are Ultra Wide SCSI-2 and can be configured as either or drive interface
£ »Compatibility and automatic matching of any SCSI HDDs complying with SCSI-1,
SCSI-2 or Wide SCSI, Ultra Wide SCSI specification.
£ »Fully Ultra Wide SCSI-2 implementation including Tagged Command Queuing and
Multi-Threaded I/O.
£ »Uses 486 CPU with all executable firmware downloaded into high-speed DRAM.
£ »EDO DRAM support for enhanced performance.