what is secondary storage devices? explain two secondary storage devices.
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This differs from primary storage technology, such as an internal hard drive, which is constantly available. Examples of secondary storage devices include external hard drives, USB flash drives, and tape drives. These devices must be connected to a computer's external I/O ports in order to be accessed by the system.
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Typical secondary storage devices include magnetic tape drives, magnetic disk drives, compact optical disk drives, and archival storage devices such as disk jukeboxes. Figure 1.6. Memory hierarchy. Magnetic tape information storage provides a low-cost, high-density storage medium for low-access or slow-access data.
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