Description: Disk II: Specifications (Discontinued)
Header: Disk II: Specifications (Discontinued)


 This article last reviewed: 16 August 1985

 I. Technical Specifications

     A. Format

          1. Sectoring: Soft (hard-sectored disks may be used)

          2. Recording Surfaces: 1

          3. Tracks per surface: 35

          4. Sectors per track: 16

          5. Bytes per sector: 256

     B. Capacity

          1. Formatted data capacity: 140K
               a. 16 sector
               b. Under: Pascal, DOS 3.3, and ProDOS

          2. Available data capacity:
               a. 16 sector
               b. 137K under Pascal
               c. 124K under DOS 3.3 and ProDOS

     C. Characteristics

          1. Head movement time:
               a. 25 milliseconds track to track
               b. 600 milliseconds across all tracks

          2. Head load time: 50 milliseconds

          3. Average rotational delay: 100 milliseconds

     D. Packaging

          1. Controller: Printed circuit board that plugs into one of the
             expansion slots.
               a. Drives per controller: 2

          2. Drive dimensions:
                           inches  centimeters
               a. Height:   3.25       8.3
               b. Width:    5.75      14.6
               d. Depth:    8.0       20.3
                           pounds  kilograms
               e. Weight:   3.0        1.36

          3. Power source for drives: Apple system power supply

 II. System Configuration

      A. Apple II, II Plus, IIe, or Enhanced IIe

           1. Recommended minimum memory: 32K

           2. Controller card
 Copyright 1988 Apple Computer, Inc.
 Keywords:  SPECSHT