07 External Memory - MetaLab

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Continue..• CD-ROM appropriate for large amount of data• It is removable• Disadvantages:▫ Read only-cannot be updated▫ The access time is longer compared to magneticdisk drive
Other Optical Storage• CD-Recordable (CD-R)▫ Write once read only memory (WORM)▫ Compatible with CD-ROM drives• CD-RW▫ Erasable▫ Getting cheaper▫ Mostly CD-ROM drive compatible▫ Can be rewritten and can used as secondarystorage similar to magnetic disk
Page 1 and 2: William StallingsComputer Organizat
Page 3 and 4: Magnetic Disk• Disk - a circular
Page 5 and 6: Inductive Write MR Read
Page 7 and 8: Disk Data Layout
Page 9 and 10: Disk Layout Methods Diagram
Page 11 and 12: Multiple zone recording (MZR)• To
Page 13 and 14: Removable or Not• Removable disk
Page 15 and 16: Multiple Platters
Page 17 and 18: Classification of disk based on hea
Page 19 and 20: Disk performance parameters• The
Page 21 and 22: Optical Storage CD-ROM• Originall
Page 23: Continue..• Data on CD/CD-Rom is
Page 27 and 28: DVD - technology• Multi-layer•
Page 29 and 30: Magnetic Tape• Tape system use th

07 External Memory - MetaLab

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