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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
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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
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
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
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
