Edit Devices, ContinuedHard diskHard disk drives are generally part of the system unit. These sealed units aredrivesinside the unit as stacks or tiers of rigid metal platters that are not removable.Some of the advantages of hard disk drives are their increased speed ofexecution and memory capacity. Hard disk storage capacities range from 50MB to 2 GB. Also, there is no need for you to open, close, file, or find adiskette manually and no initialization or rebooting, as there is with a floppydisk.RemovableData that is sensitive information and requires protection, such as classifiedhard diskmaterial or advancement examinations and results, belongs on a removabledrivesdisk drive. Programs which are large and memory intensive also belong on aremovable hard drive. Removable hard disk drives are just like built-in harddisk drives except for their portability. You can physically remove aremovable hard disk drive from the system unit for safekeeping in a securearea, such as a safe.Figure 3-8 shows a removable hard disk drive.Figure 3-8. —A removable hard drive.Continued on next page3-17
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