1. Copyright © 2007 Heathkit Company, Inc. All Rights Reserved PC Fundamentals Presentation 17 – The CD-ROM Drive

2. 2 Objectives At the end of this presentation, you will be able to:

3. 3 Explain why the CD-ROM drive is indispensable to the personal computer. Compare and contrast the CD-ROM with the floppy disk. State the storage capacity of a CD. Explain how data bits are stored on a CD- ROM. Explain how data is written to a CD-ROM. Explain the difference between the CD-R and the CD-RW CDs.

4. 4 The CD-ROM = 450 Floppy Disks Storage 650 MB

5. 5 Floppy Disk Magnetic Tracks are concentric CD-ROM Laser Reading One spiral track

6. 6 Floppy Disk Magnetic Tracks are separate circles Track 0 at the outer edge CD-ROM Laser Reading One Spiral Track From Inside to Outside End Beginning Track 79 Track 0

7. 7 16,000 laps per inch 16,000 laps per inch 135 tracks per inch 135 tracks per inch

8. 8 Magnetic Disk Angular rate is constant Shorter track on inside means tighter packed data CD-ROM Disk Linear rate is constant Shorter track on inside means higher rotational speed there.

9. 9 Track 0 Track 1

10. 10 In addition to data, each sector also contains Error Detection Codes (EDC) and Error Correcting Codes (ECC). In addition to data, each sector also contains Error Detection Codes (EDC) and Error Correcting Codes (ECC). Sector

11. 11 Never wipe in line with the Sector! OK

12. 12 Top or Label Side Clear Protective Coating Reflective Metal Layer Reflective Metal Layer

13. 13 Data, in the form of PITS and LANDS Beam is reflected Beam is absorbed

14. 14 Recordable Media Gold Layer

15. 15 Recordable Media CD-R is Write Once Read Many (WORM) RD-RW is Read/Write, or Re-writeable Photo-sensitive Dye Layer Photo-sensitive Dye Layer

16. 16 Four Basic CD-ROM Interfaces SCSI (Small Computer Systems Interface) EIDE (Extended Integrated Drive Electronics) SATA Other Interfaces

17. 17 Access Speeds Single-speed (1x) 150 KB/s Quad-speed (4x) 600 KB/s Eight-speed (8x) 1.2 MB/s Ten-speed (10x) 1.5 MB/s Sixteen-speed (16x) 2.4 MB/s Twenty-speed (20x) 3 MB/s Twenty Four-speed (24x)3.6 MB/s Fifty Two-speed (52x) 7.8 MB/s

18. 18 Installing a CD-ROM Drive 1. Install or select the hardware interface. 2. Install the physical drive. 3. Install the device driver. 4. Link the device driver name to the operating system

19. 19 Primary EIDE Channel Primary EIDE Channel Secondary EIDE Channel Secondary EIDE Channel

20. 20 CD-ROM Drive Locations

21. 21 Metal knockout Plastic snap out

22. 22 Power to CD-ROM Drive Power to CD-ROM Drive 22

23. 23 Control to CD-ROM Drive Control to CD-ROM Drive 23

24. 24 Connect the CD-ROM drive to the sound card

25. 25

26. Copyright © 2007 Heathkit Company, Inc. All Rights Reserved PC Fundamentals End