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Computer Busses by William Buchanan

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7

SCSI

7.1 Introduction

SCSI has many advantages over IDE, these include:

 A single bus system for up to seven connected devices.

 It supports many different peripherals, such as hard disks, tape drives, CD-ROMs, and so on.

 It supports device priority where a higher SCSI-ID has priority over a lower SCSI-ID.

 It supports both high-quality connectors and cables, and low-quality connection and ribbon cable.

 It supports differential signals, which gives longer cable lengths.

 Extended support for commands and messaging.

 Devices do not need individual IRQ lines (as they do in IDE) as the controller communicates with the devices.

 It has great potential for faster transfer and enhanced peripheral support.

7.2 SCSI types

SCSI has an intelligent bus subsystem ...

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