Guide to SCSI Cables

SCSI Cable : What is it?

Scsi Cables

Small Computer System Interface (SCSI) cables transmit data between computers and different SCSI devices through a computer bus. They are made of several conductor wires forming a flat ribbon cable, device connectors, and sometimes a terminator. They are mostly used for hard disks and other storage devices, but they also work with printers, scanners, and most types of computer hardware.

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Types of SCSI Cables

Scsi CablesScsi Cables

Kinds of SCSI Cables include the following:

Internal SCSI cables

  • Internal SCSI cables are used for internal devices such as hard disks, CD drives, and floppy drives.
  • They have less rugged shielding and are usually thinner, because the computer case provides much of the protection.
  • Some cables use fully parallel wiring, while others combine parallel and twisted wires in one cable.

External SCSI cables

  • External cables are used for devices residing outside the computer and having their own power supply.
  • They are covered with a metallic shield to protect them from noise, interference, and outside damage.
  • The wires are arranged into twisted pairs to improve signal integrity.

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Choosing SCSI Cables (Buying tips)

Wire structure: Choose an SCSI cable with twisted-pair wiring to reduce interference from external sources or other devices inside the computer case. Make sure it is properly shielded with copper foil or aluminum.

Choose a 50-wire SCSI cable for floppy drives and small external storage devices. For large hard disks requiring a high transfer rate, choose a 68-wire cable.

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