EIDE is an improved version of the IDE drive interface that provides faster data transfer rates compared to the original standard.
EIDE full form is “Enhanced Integrated Drive Electronics.”
Where the original IDE drive controllers support transfer rates up to about 8.3 Mbps, EIDE can easily support transfer data up to 16.6 Mbps, which is twice as fast.
This term EIDE may seem a bit ambiguous, as it technically refers to an ATA standard which is ATA-2 or Fast ATA. Therefore, these terms EIDE, ATA-2, and Fast ATA are often used on the basis of interest.
At the same time, to further increase this confusion, EIDE refer to ATA-3 standard too, which is very similar to ATA-2, but it also includes some additional features.
ATA-3 supports the same maximum data transfer rate as ATA-2, but it has SMART support and uses a 44 pin connector as well.
While EIDE has been used for many years as the most common drive controller, it has also been replaced by an updated version of ATA Standard that supports Ultra DMA.
This includes ATA-4 to ATA-7 standards, which provides data throughput rates ranging from 33 to 133 Mbps.
Most modern computers use a completely new standard called “Serial ATA,” or SATA. At the same time, it supports even faster transfer rates.