Like this CertiGuide? Get it in PDF format!
Click Here!
Use coupon code "SAVE50" to get it half price!

Custom Search







Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0100:  Hard Drives
      9  VI  Older Hard Drive Technologies and Interfaces

Previous Topic/Section
VI  Older Hard Drive Technologies and Interfaces
Previous Page
Pages in Current Topic/Section
1
Next Page
RLL
Next Topic/Section

FM and MFM

Frequency Modulation (FM) was used as an encoding scheme for the 8-inch floppy on the earliest hard drives and floppy drives. The challenge with FM was it needed to use space for a timing signal. Enter Modified Frequency Modulation (MFM) This encoding doubled the capacity for floppy drives creating what is commonly referred to as Double Density (DD) disks. MFM is still the standard used for floppy drives today.


Previous Topic/Section
VI  Older Hard Drive Technologies and Interfaces
Previous Page
Pages in Current Topic/Section
1
Next Page
RLL
Next Topic/Section

If you find CertiGuide.com useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider buying an inexpensive PDF equivalent of the CertiGuide to A+ (Core Hardware) from StudyExam4Less.com. (Use coupon code "SAVE50" to save a full 50% off the already low price!) Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

CertiGuide to A+ (Core Hardware) (http://www.CertiGuide.com/aplush/) on CertiGuide.com
Version 1.0 - Version Date: December 6, 2004

Adapted with permission from a work created by Tcat Houser.
CertiGuide.com Version Copyright 2004 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.