What is Enhanced-IDE (EIDE) and Fast-ATA?

Enhanced IDE (EIDE) was a marketing program first initiated by Western Digital. EIDE has two sides: 1) Software - an Enhanced BIOS Specification that surpasses the 504 MB hard drive capacity limitation valid at that time 2) Hardware - hard drives that conform to the ATA-2 and ATA-PI Standards. Fast-ATA, EIDE's counterpart, was a separate marketing program that was introduced by Seagate and Quantum. This program leaned conservatively toward the ATA-2 specification.

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