Apple Hard Disk 20SC

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The Apple Hard Disk 20SC (not to be confused with the Apple Macintosh Hard Disk 20, the first hard drive manufactured by Apple exclusively for the original Macintosh floppy disk drive port interface) was Apple's first SCSI based hard drive for the Apple II family as well as the Macintosh and other third party computers using an industry standard SCSI interface.

Released in September 1986, it was the first to include Apple's SCSI interface. It was a welcome addition at considerably faster data transfer rates (up to 1.25 megabytes per second) over its much slower predecessors, the Hard Disk 20 (500 Kilobits per second) and ProFile (which could only be used with the Macintosh XL).

This example in our collection was kindly donated by Nick & Diana Reeves.

Date : September 1986

Manufacturer : Apple

This exhibit has a reference ID of CH11815. Please quote this reference ID in any communication with the Centre for Computing History.

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