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External hard drive
Hard disk drive is to read and write data in the hard disk (data) machine, read and write data to be stored on hard disk. In accordance with different hard disk drive interface is divided into IDE (Integrated Drive Electronics), SCSI (Small Computer internal hard disk System Interface) external hard drive two. IDE hard disk specification is ATA, ATA has several versions, such as ATA-1, ATA-2, ATA-3, Ultra-ATA, ATA/66 and so on, each version in accordance with different transmission rates for the respective. SCSI hard drive refers to the need to go through SCSI interface to an external hard drive
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