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Wednesday, October 24, 2018

10 examples of storage devices

10 examples of storage devices  


Computer Storage Devices
         






Today we will discuss some primary and secondary storage devices which can store data either temporarily or permanently.

1. RAM (Random Access Memory)

Random access memory is one of the most important memory not only in computer, another electronic device just like tablets, smartphones also required. RAM is a volatile Memory, it can store data until the computer is turned off. RAM provides space to your computer to read and write data by the help of CPU (central processing unit).When you are using MS Word, Excel, Power Point, notepad, paint or playing any game that mean that time you are using Primary memory(RAM).Some time we have seen that the task processing time is very slow when we use so many application at the same time in your computer, that means every application are working on RAM, but you can reduce the processing time by the help of increasing the RAM size.

There is two type of RAM......
1. SRAM (Static Random-Access Memory)
2. DRAM (Dynamic Random-Access Memory)
Random Access Memory
Random Access Memory
2. ROM (Read Only Memory)

Read Only Memory is the full form of ROM. Unlike RAM (Random Access Memory), ROM is a non-volatile memory, you can only read but you can't write anything on this memory. RAM is a Volatile memory that's why RAM can't store data permanently but ROM is different than RAM, ROM can store data permanently. This chip is very essential for boot-up, it performs major input/output tasks and holds programs. ROM not only used inside of computer, there are so many other electronic devices are available in market where ROM is used.
    Now we will discuss the various types of ROM....
1.Programmable Read Only Memory (PROM)
2.Erasable and Programmable Read Only Memory (EPROM)
3.Electrically Erasable and Programmable Read Only Memory (EEPROM)
4.Masked ROM (MROM)
Read Only Memory
                        Read Only Memory
 3. USB Flash Drive

A USB Flash Drive is a small, ultra-portable storage device which is used to store data and transfer information. Flash drives are also called as pen-drives, jump-drives, and thumb-drives. Basically, every USB flash drive are re-writable and removable. Actually, USB Flash Drive is robust because there are no moving parts. At the time of First stage the size of USB Flash Drive was just like 8 MB and now the size of USB Flash Drive is just like 2 GB to 1 TB.

Usb Flash Drive
USB Flash Drive

4. Memory Cards

A Memory Card is a small storage device just like 16 MB to 64 GB and this storage device is used for storing media and data files. Memory card is Non-Volatile, permanent storage device which is used inside of Phone, Camera, and many other electronic devices. There are so many types of memory card in market, and it's totally depended on size.
Memory Card
Memory Card

5. CD (Compact Disk)

The CD was created by Pilips factory in Germany on august,1982. Compact Disk is the full form of CD, it’s looks like a flat, round and the measures of standard CD is 120 millimeters and across 1.2 mm thick. The size of Compact Disk is 650 Megabytes to 700 Megabytes. A compact Disk is a portable storage medium that can store audio, video, picture, and also Data.
  Compact Disk
                          Compact Disk

6. DVD (Digital Video Disk)

DVD (Digital Video Disk) is an optical disk format invented and developed in 1995.The Capacity of CD is 4.7 GB and the Weight is 16 grams. The Compact Disk can store any kind of digital media just like video, audio, picture, game, software, data. Actually, DVD is just like a ROM because data can only be read and not written. DVD can be single side or double side both, the size of single side DVD is 4.7 GB and the size of double side DVD is 9.4 GB.
Digital Video Disk
Digital Video Disk

7. HDD (Hard Disk Drive) 

IBM company’s engineer created the first Hard Disk Drive in 1953.The size of Hard Disk was just like two refrigerators. A Hard Disk Drive is a non-volatile secondary storage device, here data can store permanently. unlike RAM, it is non-volatile means data is retained when the computer is turned off. A Hard Disk Drive is actually a set of stacked disks. The first production IBM hard Disk was 305 disk storage which was shipped in 1957.
Hard Disk Drive
Hard Disk Drive

8. Punch Card

Punch card is a piece of stiff paper, which is used to hold digital data. Punch cards also known as Hollerith cards, At the time of 1900 that time Punch cards were the primary device of storing and retrieving the data. Still now some voting machine also uses punched cards to record votes.
Punch Card
Punch Card


9.  Cloud Storage

Cloud Storage is a one type of service in which data is maintained, managed and stored on remote servers accessed from the internet. Cloud Storage services allows the people to store any type of data by online, so that people can access their data from any location via the Internet. Actually, this is the payable service. and it's totally maintained, operated and managed by a cloud storage service provider. 
Cloud Storage
Cloud Storage

10. Magnetic tape

Magnetic tape was invented by Fritz Pfleumer in 1928.It can only store sound recording, this is one of the oldest technologies for electronic data storage. Magnetic tape is very high capacity, low cost and also long durability, but now the use of Magnetic tape is very low because so many other devices are available except Magnetic tape.
Magnetic tape
Magnetic tape



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