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Home > Cables & Connectors > Internal Cables > The 3.5" Floppy Diskette Ribbon Cable
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The 3.5" floppy diskette ribbon cable is being considered obsolete. Most desktop computers built from year 2010 onwards do not support floppy drive technologies. However, computers built before this time are built with a floppy drive cable was predominately used in old 80386, 80486, and Pentium computers to provide storage for up to three floppy disk drives. This cable has four sets of connectors. Two connectors for controlling two seperate 5.25" disk drives and an additional two connectors for controlling two 3.5" disk drives.

Newer floppy cables are limited to controlling two floppy drives hence the cable will utilize two sets of connectors.

 
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Additional Resources
 
Cable Pin Assignments:
Cable pin assignment for

Internal PC Cables

External PC Cables

Internal PC Connectors

External PC Connectors
 
Ultra ATA (44 Pin)
Ultra ATA (44 Pin)

Ultra ATA (50 Pin)
Ultra ATA (50 Pin)
Small Computer Systems Interface
SCSI



Serial Advanced Technology Attachment
Serial ATA



ST506




Apple Power
Book Ata


Apple Power
Book SCSI


Novell Procomp External SCSI


Paravision SX-1 External IDE

 
Introduction
This illustration shows what a typical Floppy disk drive ribbon cable looks like.
Standard 40 pin floppy disk drive diskette ribbon cable.

This illustration shows an older generation floppy drive cable.

Connectors-Illustrated

The floppy drive data cable shown above allows a desktop computer to have two floppy drives connected to one controller. Because floppy drives do not have a master and slave configuration like hard drives do, the drives are defined by the cable select mode, which can be identified by looking for a twist in the cable. The end with the twist in the cable (which also has a red mark on pin 1) must be attached to the floppy drive; the other end connects to the floppy disk connector on the computer's motherboard. A standard floppy drive connector contains 34-pins or holes that connect up with the pins soldered into a 3.5" floppy drive.

When connected internally within the computer newer generation floppy drive cables provide a less cluttered design, resulting in improved airflow within the computer tower which helps lower the temperature of the system unit.

 
Specifications:
Creation Year:
Superseded By:
Cable Capacities:
Data Width:
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Cable Style:
Hotplugging Support?
External Interfaces:
Supported Devices:
Explanations Of Connectors:
# Purpose
1 IDC34F
IDC34F
This connector connects to a floppy disk drive 34 pin connection.
2 IDC34F
IDC34F
This connector connects to a second floppy disk drive 34 pin connection.
3 IDC34F
IDC34F
This connector connects to a computer motherboard.
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6
7
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Typical Lengths:
Typical lengths of dual floppy drive cables are 32 inches.
 
Advantages and Disadvantages:
Ideal for troubleshooting or rebuilding older systems lacking proper boot device. Old, outdated technology.
Small storage capacity.
Very slow when reading and writing data.

 

 
Cable Features:

 

 
Installation Guides
How To Install A 3.5 " Floppy Disk Drive
This document will provide an overview of how to install a 3.5" floppy diskette drive into a personal computer.
 
Troubleshooting Guides
What You Can Do When Your Floppy Drive Fails
This document provides an overview of what you can do when your floppy drive fails due to hardware error or an installation mishap. You will obtain an understanding of how to effectively troubleshoot the most common type of floppy drive errors.
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