STORAGE DEVICE
NOTE:- any of the processing done done in the computer access data as likely as binary. yes,in processing of binary in any task they access the storage.
=>you know very well in thew computer or in phone why we need storage but instead of we want storage for processing we explained above all computer working storage measurly having two types.
First is primary storage device and second is secondary storage device.
PRIMARY STORAGE DEVICE
It is also known as internal memory it is a temporary memory.its functioning to the computer handle firstly all of the activity done in the computer internally. All the computer activity and also instead of CPU prefix the all of them firstly prefer two types primary memory they is also by they re also a loyal memory. they are very loyal towards computer for better functioning by the computer the all of the CPU. Task performing drivers installed by them by the ROM.
They are of two types
· RAM(RANDOM ACCESS MEMORY)
· ROM(READ ONLY MEMORY)
1. RANDOM ACCESS MEMORY, It is a volatile memory it can store the data automatically and the data is remain it when the computer is on as the electricity has gone or computer id turn off the data will erase autometically there are th4ree types.
· DRAM(DYNAMIC RANDOM ACCESS MEMORY)
· SRAM (SYSTEMETIC RANDOM ACCESS MEMORY)
· FRAM (FEROMEGNETIC RANDOM ACCESS MEMORY)
2. READ ONLY MEMORY , It s a permanent memory and also called non-volatile memory. It the rom data is stored permanently and the can not be erase the data when the flow of electricity in the computer system has gone.means when we turn off the computer the data stored in READ ONLY MEMORY. Has not be erased.
There are three types of READ ONLY MEMORY
· PROM (PROGRAMABLE READ ONLY MEMORY)
· EPROM(ERASABLE PROGRAMABLE READ ONLY MEMORY)
· EEPROM(ELECTRICALLY ERASABLE PROGRAMABLE READ ONLY MEMORY)
SECONDARY STORAGE DEVICE
These device are also known as the external storage device they can not be the more sustainable or responsible memory of the computer they only works with tropology of the computer they are not work when the primary memory do not obey the permission to run they are used for gain the storage capacity of the computer. They are of several types such as.
Hard disk:-it is a two nor more flexible disk where the data is stored the disk in which the head don’t move called fixed head on the movable head disk normally have on the read right head which is flowed on as own this are allows head to position on any track of the plotter a hard disk moved 3600 RPM movable.
Floppy disk:-it is a magnetic disk is CIRCULAR PLATE of plastic which is coated with megnetsible material for current is passed through the head which produced the magnetic field these magnetic disk divided in to the path. And these. Sectors are divided in to track where the data is stored.
iCD-ROM:-it stand for compectable disk READ ONLY MEMORY this answer proper data transfer CD-ROM to the main memory the carbonate which is coated with aluminium from a highly reflected circle.
Removable disk:-it is also known as transferable device that is use to transfer device that is use to transfer the data easily. From one place to another place or one computer to another it is handle to safe.
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