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SUBJECT : INFORMATION TECHNOLOGY
TEACHER : SIR ZEESHAN ABBAS
Group Presentation:- Members:-
ANIS-UR-REHMAN SHAH (1421-315229) NOUMAN ZIAFAT (1421-315225) NOUMAN AKBAR (1421-315238) UMER MAQBOOL (1421-315226) TAMRAIZ SADIQUE ( 1421-315 ABDUL MANAN (1421-315
CHAPTER : 07
"Storage and Communication Hardware"
Presentation Contents:-
Hard & Floppy Disks
Disk Storage Removable &
Fixed Disks Disk Controller Optical disk
storage Recordable disk Ram Drives
Data Transmission Modes
Read Only Disks Mass storage Erasable Disks Tape Cartridges Flash Memory
Data Transmission Modes
Transmission is a process of sending and propagating. There are three ways, modes for transmitting data from one point to another. These are simplex, Half-duplex and full-duplex.
Transmission modes
• Simplex signal transmitted in one direction e.g. Television. • half duplex both stations transmit, but only one at a
time e.g. police radio.• Full duplex
simultaneous transmission e.g. telephone.
Hard and Floppy Disks
Hard disks: Hard disk provides users with
fast access to stores data. Storage capacities can exceed to 1 billion bytes (gigabyte). Hard dish comes in variety of sizes.
Hard and Floppy Disks
Floppy Disks: Floppy disks, or diskettes,
are round, flat, flexible pieces of plastic used primarily for data storage and back up in personal computer system.
Disk Storage
Disk Storage: Disk drives store data on
disks in concentric circles called disk tracks.
Removable & Fixed Disks
Removable Disks: Disks packs can be
inserted into a disk drive for temporary use.
Removable & Fixed Disks
Fixed Disks: Fixed disks are built inside
the computer case and sealed from the outside environment to protect the disk.
Disk Controller
Disk Controller: A hard disk controller
(HDC) is an electrical component within a computer hard disk that enables the processor or CPU to access, read, write, delete and modify data to and from the hard disk.
Optical disk storage
Optical disk storage:Optical storage
techniques used by computers are basically the same as those used to record music on compact disks. Optical disks differ from magnetic-disk storage. A laser beam is used to write and read data.
Recordable disk
CD-R discs are blank CDs that can record data written by a CD burner. The word "recordable" is used because CD-Rs are often used to record audio, which can be played back by most CD players. However, many other kinds of data can also be written to a CD-R
RAM Drives
Flash Memory
Tape Cartridges
Erasable Disk