ocr: Macintosh Internal Hard Disk 40SC System Requirements Touseal Macintosh Internal Hard Disk 40SC, you must havez a Macintosh SE, MacintoshSE/30, Macintosh II, Macintosh IIcx, or Macintosh IIx personal computer. Technical Specifications Capacity Data capacity: 401 megabytes (formatted) Data surfaces: 3and4 Heads/ Surface: 1 Block. size: 512h bytes Total disk blocks: 82,020 Blocks/Track: 28,33,and35 Characteristics Average seek time: 30milliseconds Rotational speed: 3.600and3,662rpm Startup time: 20scconds Spin-down time: 20: seconds Interface Connects directly to the Macintosh SF, Macintosh SE/3 ...