The formalstandardof IDE whichis (ANSI)byin 1989. As for first ATA standard, as for maximum data rate being 3.3MB/ second, as for maximumcapacityof 1 hard disk to 528MB.Somewhat improvement is added in comparison with IDE. After that,the standard of ATA-4 and the like which standardized ATA-3, ATA and ATAPI which did
the improvement and fault control functional addition of and the reliability whichstandardizeEIDE is decided.
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