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Unformatted text preview: where it is stored o optical compact disks (CDs) around 250 Megabytes per CD random access, but the delay in reaching a given item of data may be 1 second or more Volumes • a volume is a single tape, CD, diskette or fixed disk, i.e. a physical unit of storage Files • a file is a logical collection of data - a table, document, program, map • many files can be stored on a single volume • files are given names o the rules for naming files vary among types of systems • the computer operating system keeps track of files stored in a volume by using a table called a directory o files are identified in the directory by name, size, date of creation and often type of contents • files are often organized into subdirectories so that the user can group files under specific topics...
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- Fall '08
- USB flash drive, Computer data storage, random access, Floppy disk