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   ocr: Apple Hard Disk 40SC System Requirements Seet the Apple Hard Disk 20SCI for the Apple Hardi Disk 40SC: system requirements. Product Details SCSI expansion devices to: an. Apple lle or Apple SCSI expansion lets you connect IIGs, or as many: as: six toa asi many: ast three: additional SCSI Macintosh. Technical: Specifications Capacity Data capacity: 401 megabytes (formatted) Data surfaces: 3or4 Heads/Surtace: 1 Block: size: 512bytes Total disk blocks: 82,020 Blocks/Track: 28,33,0r35 Characteristics Average: seek time: 30milliseconds Rotationals speed: 3,600or 3,662r rpm Startup time: 20 seconds ...