Chapter 1

Overview

This chapter provides an overview of the MegaRAID® SCSI 320-2 controller. It contains the following sections:

•Section 1.1, “SCSI Channels”

•Section 1.2, “NVRAM and Flash ROM”

•Section 1.3, “SCSI Connectors”

•Section 1.4, “Single-Ended and Differential SCSI Buses”

•Section 1.5, “Maximum Cable Length for SCSI Standards”

•Section 1.6, “SCSI Bus Widths and Maximum Throughput”

•Section 1.7, “Documentation”

The MegaRAID SCSI 320-2 controller has two SCSI channels. Throughput on each SCSI channel can be as high as 320 Mbytes/s. MegaRAID supports a low-voltage differential SCSI bus or a single- ended SCSI bus.

The MegaRAID SCSI 320-2 is a high-performance intelligent PCI-to- SCSI host adapter with RAID control capabilities. The MegaRAID SCSI 320-2 requires no special motherboard PCI expansion slot. The card includes an Intel 80303 processor. MegaRAID provides reliability, high performance, and fault-tolerant disk subsystem management.

1.1SCSI Channels

The MegaRAID SCSI 320-2 has two Ultra320 SCSI channels. One LSI Logic dual SCSI controller supports both channels. Each SCSI channel supports up to fifteen SCSI devices.

MegaRAID SCSI 320-2 Hardware Guide

1-1

Copyright © 2002 by LSI Logic Corporation. All rights reserved.