- The EIDE drive was first introduced by Western Digital and includes two parts to the concept, a software and a hardware aspect. The software component of the EIDE drive allows for enhancement of the BIOS specifications, allowing drives with capacities larger than the previously standard 504 MB allotment.
- The hardware component of the EIDE drive allows for the drive to be installed using either ATA-2 or ATA-PI principles. This allows for the EIDE drive to use the same connections as an ATA-2 or ATA-PI disk drive.
- There are a number of different types of EIDE drives on the market. There are high-performance EIDE drives that boast improved speeds and increased capacities. There are mainstream EIDE drives used in standard systems and there are value EIDE drives that are not as fast as high-performance or mainstream drives, but are cheaper in cost.
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