March 2000
Intermediate to advanced
632 pages
18h 6m
English
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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 ...