Next Previous Contents

---

The Linux Ultra-DMA Mini-Howto

Brion Vibber, brion@pobox.com

v3.01, 6 December 2001

---

This document is intended to explain how to use Ultra-DMA aka Ultra-ATA aka Ultra33 and Ultra66 hard drives and interfaces with Linux. The most recent version of this mini-Howto can be obtained in HTML format at http://pobox.com/~brion/linux/Ultra-DMA.html .

---

1. Introduction and Disclaimer

• 1.1 Disclaimer
• 1.2 Credits
• 1.3 Document History
• 1.4 Copying

2. What is Ultra-DMA and why do I want it?

• 2.1 IDE, EIDE, & ATAPI
• 2.2 Bus Master DMA
• 2.3 Ultra-DMA aka Ultra-ATA aka Ultra33 aka...
• 2.4 Just how ``Ultra'' is it anyway?
• 2.5 How does UDMA compare to SCSI?

3. Using your UDMA hard drive with an EIDE interface

4. Using your hard drives with a UDMA interface

5. Offboard PCI UDMA interfaces

• 5.1 Promise Ultra33
• 5.2 Promise Ultra66
• 5.3 Artop ATP850UF
• 5.4 Adding device files

6. Onboard UDMA interfaces

• 6.1 Intel FX, HX, VX, TX, LX, and BX
• 6.2 The VIA VP2 and Related Chipsets
• 6.3 TX Pro and other ``Pro'' boards
• 6.4 HPT 366

7. Unified IDE Patches

8. Activating and Deactivating UDMA

• 8.1 Using kernel boot parameters
• 8.2 Using hdparm

9. Problems

• 9.1 The UDMA Blacklist
• 9.2 Are you overclocking?
• 9.3 Is your BIOS current?
• 9.4 If you still can't get it to work!

10. If you have some information about UDMA stuff that's not in this mini-howto...

---

Next Previous Contents