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Secondary Storage Device Sequential Access Device Direct Access Device Magnetic Disk Optical disk Magneto-optical Disk Floppy Disk Hard Disk Zip Disk CD-ROM WORM Disk Magnetic Tape
MAGNETIC TAPE:
MAGNETIC TAPE Magnetic tape is a medium for magnetic recording, made of a thin magnetic coating on along a narrow strips of plastic . In this audio , video and computer data are stored.
Working Of Magnetic Tape:
Working Of Magnetic Tape It is divided into vertical columns and horizontal rows. Data is stored in a string of columns with one data per frame. It uses two reels supply reel and take up reel. The tape moves from the supply reel to take up reel
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On a magnetic tape , data is recorded in the forms of blocks , where each block consists of a grouping of data (known as records) that are written or read in a continual manner.
Magnetic Disk:
Magnetic Disk High storage capacity. They are reliable. Data can be stored directly.
MAGNETIC DISK:
MAGNETIC DISK Bits of data (0’s and 1’s) are stored on a circular magnetic platters called disks. A disk rotates rapidly (and never stop) A disk head reads and writes bytes of the data as they pass under the head. Often , several platters are organised into a disk pack or disk drive.