 Slide 4.1: Secondary storage devices Slide 4.2: A brief history of hard disks Slide 4.3: A hard disk structure Slide 4.4: A disk access Slide 4.5: The cost of disk accesses Slide 4.6: Floppy disks Slide 4.7: Magnetic tapes Slide 4.8: Magnetic tapes (cont.) Slide 4.9: Magnetic tapes (cont.) Slide 4.10: The cost of magnetic-tape accesses Slide 4.11: CDs (Compact Discs) Slide 4.12: DVDs (Digital Versatile Discs) Slide 4.13: Flash memory Slide 4.14: Conclusions |