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IDE
 "IDE" (acronym for "Integrated Drive Electronics") is the term for a common type of hard drive in which the majority of the controller is integrated in the drive itself.
This makes connecting this type of hard drive to a computer relatively easy and economical.
Since two controllers would be active when two IDE hard drives are used, one of the drives must be configured as the so-called master and the other as the slave. The controller on the slave device is turned off and it is controlled by the master drive.
IDE hard drives are somewhat less expensive than SCSI hard drives yet offer similar performance.
That is why they have become the most widespread type of hard drive. The original IDE specification was expanded in 1993 to the not totally standard Enhanced IDE specification which permits the operation of additional devices such as streamers and CD-ROM drives as well as hard drives with capacities greater than 528 MB.
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