BS ISO/IEC 9171-1 : 90 AMD 7796

1. Scope
2. Conformance
3. Normative references
4. Definitions
4.1 case
4.2 Clamping Zone
4.3 Control Track
4.4 cyclic redundancy check (CRC)
4.5 defect management
4.6 disk reference plane
4.7 entrance surface
4.8 error correction code (ECC)
4.9 format
4.10 groove
4.11 hub
4.12 interleaving
4.13 land and groove
4.14 mark
4.15 optical disk
4.16 optical disk cartridge (ODC)
4.17 recording layer
4.18 Reed-Solomon code
4.19 spindle
4.20 substrate
4.21 track
4.22 track pitch
5. General description
6. Environments
6.1 Testing environment
6.2 Operating environment
6.3 Storage enviornments
6.3.1 Short-term storage
6.3.2 Long-term storage
7. Safety requirements
8. Dimensional and mechanical characteristics of the
        case
8.1 General
8.2 Case drawings
8.3 Sides, reference axes and reference planes
8.3.1 Relationship of Sides A and B
8.3.2 Reference axes and case reference planes
8.4 Materials
8.5 Mass
8.6 Overall dimensions (figure 3)
8.7 Location hole (figure 3)
8.8 Alignment hole (figure 3)
8.9 Surfaces for reference planes P (figures 4 and 4a)
8.10 Insertion slots and detent features (figure 5)
8.11 Gripper slots (figure 6)
8.12 Write-inhibit holes (figure 7)
8.13 Media sensor holes (figure 8)
8.14 Head and motor window (figure 10)
8.15 Shutter (figure 11)
8.16 Slot for shutter opener (figure 11)
8.17 Shutter sensor notch (figure 9)
8.18 User label areas (figure 13)
9. Dimensional and Physical Characteristics of the Disk
9.1 Dimensions of the disk
9.1.1 Outer diameter
9.1.2 Thickness
9.1.3 Clamping zone (figure 1)
9.1.4 Clearance zone
9.2 Mass
9.3 Moment of inertia
9.4 Imbalance
9.5 Axial deflection
9.6 Axial acceleration
9.7 Dynamic radial runout
9.8 Radial acceleration
9.9 Tilt
10. Drop test
11. Interface between disk and drive
11.1 Clamping technique
11.2 Dimensions of the hub (figure 1)
11.2.1 Outer diameter of the hub
11.2.2 Height of the hub
11.2.3 Diameter of the centre hole
11.2.4 Height of the top of the centre hole at diameter D9
11.2.5 Centring length at diameter D9
11.2.6 Chamfer at inner diameter D9
11.2.7 Chamfer at outer diameter D8
11.2.8 Outer diameter of the magnetizable ring
11.2.9 Inner diameter of the magnetizable ring
11.2.10 Thickness of the magnetizable material
11.2.11 Position of the top of the magnetizable ring
        relative to the disk reference plane
11.3 Magnetizable material
11.4 Clamping force
11.5 Capture cylinder for the hub (figure 12)
11.6 Disk position in the operating condition (figure 12)
12. Characteristics of the substrate
12.1 Index of refraction
12.2 Thickness
12.3 Birefringence
13. Characteristics of the recording layer
13.1 Test conditions
13.1.1 General
13.1.2 Read conditions
13.1.3 Write conditions
13.2 Baseline reflectance
13.2.1 General
13.2.2 Actual value
13.2.3 Requirement
13.3 Definitions of signals
13.4 Prerecorded marks
13.5 User written data
13.5.1 Signal IL
13.5.2 Signal IH
13.5.3 Narrow-band signal-to-noise ratio (figure 15)
13.5.4 Cross-talk
Annex A - Office environment
Annex B - Transportation
Annex C - Measurement of birefringence
Annex D - Definition of write and erase pulse width

BS AMD 7796 RENUMBERS THIS STANDARD TO BS EN 29171 PT1 Describes the optical and recording characteristics for recording information once and for reading it many times, so as to provide physical interchangeability between data processing systems. Gives definitions of essential concepts, the environment in which the characteristics are to be tested, the environments in which the cartridge is to be operated and stored and the mechanical, physical and dimensional characteristics of the case and of the optical disk.