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Understanding Secondary Storage for Data Backup and Retrieval

Secondary storage includes external and removable types, utilizing thin, rigid components to store, read, and transfer data. Various formats and capacities cater to different needs, emphasizing the importance of data backup. Explore EIDE, SATA, ATA, SCSI, and newer memory technologies for efficient data handling.

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Understanding Secondary Storage for Data Backup and Retrieval

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  1. Secondary Storage • Thin, rigid covered with a substance that allows data to be held in the form of • The more there are, the higher the • Store data in • Data read by • Formatting creates a that maps to • ride on .000001” cushion of air, and can crash! • Important data should always be backed up! • Cheap, but many moving parts

  2. Secondary Storage • Types: • External – a freestanding • Removable – inserted into a cartridge drive on the PC • Circuitry which allows the to communicate with the • EIDE – Enhanced Integrated Drive Electronics • Marketed as SATA, Fast ATA, Ultra ATA, ATA-2, ATA/100 • SCSI – Faster than EIDE controllers

  3. Storage • Data is written and read using • Data stored in the form of and • – Read Only Memory • - recording only once • – erasable, can record and erase data repeatedly • -style disk with extremely high capacity • Can store more and , and store in • Stores 4.7 or more GB • is used for recording only once • are reusable • can read , but not always vice versa • – next generation - 25 gigabytes

  4. Memory • memory with no • But the electronics can • Available as • Insert these into a of a camera, handheld PC, smartphone • A form that plugs into a • A finger-sized module of • Plugs into the of most PCs and Macintoshes

  5. The System Unit: The Basics

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