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  VII  IDE

Previous Topic/Section
IDE (PIO Mode 3)
Previous Page
Pages in Current Topic/Section
1
Next Page
40 Pins / 80 Wires
Next Topic/Section

Ultra DMA

By using Direct Memory Access (DMA), the processor is not tied up. The original DMA specification moved data at 16.6 MB per second. Ultra DMA (the 2 is implied) doubled this to 33 MB/sec. Mode 3 didn't really live long, however Ultra DMA 4 or UDMA 4 is frequently called Ultra ATA/66, named from the transfer rate of 66.7 MB/sec. As of this writing, Ultra ATA/133 is shipping. The fact that it may or may not become 'official' with ATA/ATAPI-6 won't matter to most of us.


Previous Topic/Section
IDE (PIO Mode 3)
Previous Page
Pages in Current Topic/Section
1
Next Page
40 Pins / 80 Wires
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.