Apple Hard Disk 20, 40, 80SC – Macintosh

Description

20SC / 40SC / 80SC – M2604 / M2644 / M2688.

Apple’s first SCSI external hard drive, the Hard Disk SC series brought a major leap in performance and cross-platform flexibility to the Apple ecosystem. Released in September 1986 alongside the Apple IIGS, these drives connect via the standard SCSI interface rather than a proprietary port, a significant departure from the earlier Hard Disk 20. They delivered considerably faster data transfer rates than their predecessors, up to 1.25 megabytes per second, compared to the 62.5 KB/sec of the original Hard Disk 20.

All drives come with power cable, SCSI cable and SCSI Terminator. 

Select One:

A) SN: F641383M2603. 20SC in unmarked first generation case.  Has been block tested and comes with bootable System 4.2 preinstalled.   Case is in good condition but has severe discoloration on all sides (Drive is the top drive in the stack in the third image).

B) SN: F8261HKM260. 20SC.  Has been block tested and comes with bootable System 7.0.1 with a few apps preinstalled.   Case is in generally good condition, but has a few light pry marks around seam and has light to medium discoloration on all sides (Drive is the first and second image and the second from top drive in the stack in the third image).