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Chapter 7

Chapter 7 - VIII Power a Molex = 5.25 inch floppy b Mini...

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Chapter 7 Floppy Drives I. Why Floppies a. Hold 1.44 MB of data II. Understanding Floppy Drive Types a. Diskettes come in two different sizes and types b. Floppies used in many different devices i. Apple ii. UNIX iii. PC iv. Mainframe c. 3.5 inch floppy III. Types of Diskettes a. Double Side and double density b. Double sided and high density c. Double sided, extra high density d. Only double sided high density are available today IV. Drive size a. First PC floppies used 5.25 inch format i. Called diskettes b. In 1986 3.5 inch drives appeared V. Installing Floppy Drive
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a. All windows systems reserve drive A and B for floppies b. Connect via a 34pin ribbon connector c. 7 wire twist only on ribbon cables for two floppy drives i. Helps electronically differentiate between drives A and B VI. Inserting ribbon cables a. Floppy cables have a notch in the middle i. Controller Slot has an notch to match the one on the floppy cable VII. Connectors a. 5.25 inch floppy cables and 3.5 inch floppy cables
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Unformatted text preview: VIII. Power a. Molex = 5.25 inch floppy b. Mini Molex =3.5 inch floppy IX. CMOS a. After floppy installed next step is configuring the CMOS b. 3 options can be found i. Swap floppy device 1. Change A and B drives without swapping cables ii. Disabling boot sequence 1. Tells PC not to check for floppy during POST iii. Boot sequence 1. Changes default boot sequence X. Care and feeding of Floppies a. Very susceptible to damage i. Due to a single door blocking entrance XI. Repairing floppy drives a. Blame floppy disk i. Check for data errors b. Blame floppy controller i. Check the cable c. Replace floppy drive XII. Maybe it’s the cable a. 34 th wire on the floppy is called the drive charge signal i. Wire is active when floppy is inserted or removed b. Connectivity plays a big role in floppy drive failure XIII. Fixing Floppy Drives a. To fix they require an oscilloscope which is about $300 b. Not worth fixing...
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Chapter 7 - VIII Power a Molex = 5.25 inch floppy b Mini...

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