Types and Characteristics of SCSI Adapters

SCSI adapters stand for a Small Computer System Interface. It is used to connect a microcomputer to several peripheral devices using just one port.

Devices connected in this way are said to be “daisy-chained” together, and each device must have a unique identifier or priority number.

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Uses of SCSI Adapters

A SCSI adapter can be installed on an IBM-compatible computer as a single expansion board. SCSI is often used to connect hard disks, tape drives, CD-ROM drives, mass storage media, scanners, and printers.

Types and characteristics of SCSI Adapters

There are three different SCSI interface definitions:

SCSI-1
SCSI-2
and SCSI-3

SCSI – 1

The SCSI-1 is an 8-bit interface with a maximum data transfer rate of 5 MB per second.

SCSI -2

the SCSI-2 is 16-bit or 32-bit wide (called wide SCSI).

Wide-fast SCSI has a 16-bit data bus and a maximum data transfer rate of 20 MB per second. SCSI-2 is backward compatible with SCSI-1.

SCSI -3

The SCSI-3 definition increased the number of connected peripherals from 7 to 127, increased capable lent’s, and added support for a serial interface, and a fiber optic interface.

For SCSI-3 data rates in excess of 100 MB per second are possible.

Other Adapter

The other adapters used in microcomputers are

PCMCIA (personal computer Memory card interface Association) cards for notebook computers,
MPEG (Motion Picture Expert Group) cards for full-motion video playback,
Sound cards for audio applications,
Network adapters for networking applications,
Modern cards for telephone lines, etc.

Any of these cards can be plugged into the bus slot for a peripherals device.

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