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Storage devices - Coggle Diagram
Storage devices
Primary storage devices (It is also known as internal memory and main memory. This is a section of the CPU that holds program instructions, input data, and intermediate results)
RAM (It stands for Random Access Memory, It is used to store information that is used immediately or we can say that it is a temporary memory)
SRAM ((It stands for Static Random Access Memory. It consists of circuits that retain stored information as long as the power is supply is on. It is also known as volatile memory, It is used to build Cache memory)
DRAM (It stands for Dynamic Random Access Memory, It is used to stores binary bits in the form of electrieal charges that are applied to capacitors. The access time of DRAM is slower as compare to SRAM but it is cheaper than SRAM and has a high packaging density)
SDRAM (It stands for Synchronous Dynamic Random Access Memory. It is faster than DRAM. It is widely used in computers and others. After SDRAM was introduced. the upgraded version of double data rate RAM, i.e., DDRI. DDR2, DDR3. and DDR4 was entered into the market and widely used in home/office desktops and laptops)
ROM (It stands for Read-Only Memory, The data written or stored in these devices are non-volatile, i.e, once the data is stored in the memory cannot be modified or deleted)
PROM (is Programmable Read-Only Memary. These are ROMS ihat can be programmed. A special PROM programmer is employed to enter the program on the PROM)
EPROM (Another sort of memory is that the Erasable Programmable Read-Only Memory. It is possible to erase the info which has been previously stored on an EPROM and write new daia onto the chip)
Magnetic storage devices
Hard Disk (It is a storage device (HDD) that stores and retrieves data using magnetic storage. It is a non-volatile storage device that can be modified or deleted n number of times without any problem)
Magnetic Card (It is a card in which data is stored by modifying or rearranging the magnetism of tiny iron-hased magnetic particles present on the band of the card. It is also known as a swipe card)
Tape Cassette (It is also known as a music cassette: It is reetangular flat container in which the data is stored in an analog magnetie tape)
SuperDisk (It is also called LS-240 and LS-120. It is introduced by Imation corporation and it is popular with OEM computers)
Floppy Disk (It is also known as a floppy diskette. It is generally used on a personal computer to store data extemally. A Floppy disk is made up of a plastic cartridge and secures with a protective case)
Flash memory Devices (It is a cheaper and portable storage device. It is the most commonly used device to store data because is more reliable and efficient as compare to other storage devices)
Pen drive (It is also known as a USB flash drive that includes flash memory with an integrated USB interface)
SSD (It stands Solid State Drive, a mass storage device like HDDS. It is more durable because it does not contain optical disks inside like hard disks)
SD Card (It is known as a Secure Digital Card. It is generally used with electronic devices like phones, digital cameras. etc. to store larger data)
Memory Card (It is generally used in digital cameras. printers. gane consoles, etc, It is also used to store large amounts of data and is available in different sizes)
Multimedia Card (It is also known as MMC. It is an integrated circuit that is generally used in-car radios, digital cameras, etc. It is an exteral store data/information)
Optical Storage Devices
CD (It is known as Compact Disc. It contains tracks and sectors on its surface to store data. It is made up of polycarbonate plastic and is circular in shape. CD can store data up to 700MB)
CD-R (It stands for Compact Dise read-only. In this type of CD. once the data is written can be erased)
CD-RW (It stands for Compact Dise read Write. In this type of CD, you can casily write or erase data multiple times)
DVD (It is known as Digital Versatile Dlsc, DVDS are cireular flat optical discs used to store data. It comes in two different sizes one is 4.7GB single-lay er discs and another one is 8.5GB double-layer dises)
DVD-R (It stands for Digital Versatile Disc read-only. In this type o DVD, once the data is written can not be erased. It is read-only. It is generally used to write movies, etc)
DVD-RW (It stands for Digital Versatile Disc read Write. In this type of DVD. you can easily write or erase data multiple times)
Blu-ray Disc (It is just like CD and DVD but the storage capacity of blu ray is up to 25GB. To run a Blu-ray disc y ou need a separate Blu-ray reader. This Blu-ray technology is used to read a disc from a blue-violet laser due to which the information is stored in greater density with a longer wavelength)
Cloud and Vitrual Storage (Nowadays, secondary memory has been upurided to virtual or cloud stonige devices. We can store our files and oiher stuit in the cloud and the data is stored for as long as we pay for the cloud storage. There are many companies that provide cloud services largely Google. Amazon. Microsoft, etc. We can pay the rent for the umount of space we need and we get multiple benefits out of it)