What is EIDE?
| History of EIDE 1988 |
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Command set for E-IDE drives was defined by CAM (formed Oct. 1988). This supports drives over 528MB in size. Early controllers often imposed a limit of 2.1GB, then later ones 8.4GB. Newer controllers support much higher capacities. Drives greater in size than 2.1GB must be partitioned under DOS since the drive structure (laid down in MS-DOS 4) used by DOS and even Windows '95 prevents partitions bigger than 2.1GB. EIDE controllers also support the ATAPI interface that is used by most CD-ROM drives produced after it's introduction. Newer implementations to EIDE, designed for the PCI bus, can achieve data transfer at up to 16.67 MB/s. A later enhancement, called UDMA, allows transfer rates of up to 33.3 MB/s. |
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