Digital Storage Digital Storage Ann Ware ~ warea@bkps.k12.ar.us.

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Presentation transcript:

Digital Storage Digital Storage Ann Ware ~ warea@bkps.k12.ar.us

Measuring Memory and Storage Digital Storage Measuring Memory and Storage Term Abbreviation Approximate Memory Size Kilobyte KB or K =1000 bytes (actual size is 1024 bytes) Megabyte MB =1 million bytes Gigabyte GB =1 billion bytes Terabyte TB =1 trillion bytes Ann Ware ~ warea@bkps.k12.ar.us

Methods of Storage Magnetic Flash Optical Digital Storage Ann Ware ~ warea@bkps.k12.ar.us

Magnetic Storage Storage device that codes data as microscopic magnetized needles on the disk's surface The hard disk is the most common magnetic storage device Storage capacity--terabytes

Flash Storage A type of constantly-powered memory that can be erased and reprogrammed in a single action or “flash.” Described as “solid-state” memory because there are no mechanical (moving) parts. Examples: flash drives, camera storage cards Some computers have a solid-state drive instead of the typical magnetic hard drive

Optical Storage Storage device that records data by burning microscopic holes in the surface of the disk with a laser Compact disks Digital video disks Blu-ray disks

Compact Disk Standard storage capacity: 650-700 MB Three types: Digital Storage Compact Disk Standard storage capacity: 650-700 MB Three types: CD-ROM—permanent storage (650MB) CD-R—recordable but cannot be erased (700MB) CD-RW—recordable but can be changed (700MB) Ann Ware ~ warea@bkps.k12.ar.us

Digital Storage Digital Video Disk Standard storage capacity--4.7GB; there are formats that will hold at least double that There are three basic types, although others are available: DVD-ROM—permanent storage, 17GB DVD±R—recordable, 4.7GB DVD±RW—recordable, but not erasable, 4.7GB Ann Ware ~ warea@bkps.k12.ar.us

Digital Storage Blu-ray Disk High capacity optical disk that has a storage capacity of 25GB. Has recordable and rewritable disks just like CDs and DVDs. Declining in popularity due to the increase in streaming video options Ann Ware ~ warea@bkps.k12.ar.us