On the following pages:
What is EIDE?
EIDE is the current standard for inexpensive, high performance hard disks used in PCs.
EIDE stands for Enhanced IDE and it is registered name own by harddisk manufacture Western Digital. They also own the name "IDE".
Other companies like Seagate, IBM, Quantum and Maxtor Uses the term ATA, which stands for Advanced Technology Attachment. But it is all the same. However there are many differant protocols behind the terms.
You can think of EIDE as a bus - which is a host controller - which controls it, and you can connect up to four units. Here you see the controller and its two channels:
ImprovementsThe EIDE standard is a great improvement over the old IDE. Here are some examples:
The most important feature is the interface directly on the PCI bus. This has given EIDE transfer speeds and disk capacities, which far exceed older controller principles. Concurrently, there is a continual development of the protocols, which are needed for the connection between the units and the EIDE bus.
Four units controlled by the motherboardThe EIDE interface is not designed for hard disks only. There are four channels, which can be connected to four independent units:
EIDE is thus designed as an inexpensive all-round interface, which can be connected to all kinds of storage media.
Auto detectThe BIOS on the system board has a neat auto detect feature, which often allows EIDE units to be connected directly and work immediately. The PC start up program automatically finds the necessary information about the drive via the auto detect function.
Sometimes you have to assist the hard disk installation by activating the auto detect in the CMOS Setup program, but often it runs by itself. You definitely do not have to key in information about cylinders, etc., as you had to with earlier IDE units.
Read more the boot process and system bus in Module 2b
Read about file systems in module 6a
Read about I/O buses in module 2c
Read about the motherboard chip set in module 2d
Read about RAM in module 2e
Read Module 5c about SCSI, USB etc.
Click for Module 7d about digital music, MP3s
Copyright (c) 1996-2005 by Michael B. Karbo. www.karbosguide.com.