storage devices in computer


Storage devices:

storage devices

Random Access Memory (RAM):

Random Access Memory (RAM) is  a storage devices. in the RAM can access the memory unit to transmit information from any desired random location, i.e., the word search process in memory is the same and requires the same AMT. Memory, so the name “Random Access”

DRAM (Dynamic RAM):

DRAM (Dynamic RAM) consists of transistors and capacitors that can store electrical charges. According to the switching action of the transistor, the capacitor contains neither electric charge (0) nor electric charge (1). DRAM storage density since the DRAM unit consists of a transistor and each capacitor, it allows a DRAM chip to compare a large number of units in the chip with SRAM. In general, DRAM chips are available in 128-bit or 256-bit or higher densities. The problem with the DRAM-Refresh capacitor is that it starts to lose charge for a period of time and can keep data for nearly 1 per thousand seconds. Therefore, the memory controller must flush the contents of memory up to thousands of times, which is called a color of memory.


Type of DRAM:

DRAM type:

The Edo RAM cell retains its valid data until it receives an additional signal. It has a dual pipe architecture that allows the memory controller to simultaneously read new data while releasing the old one.

Synchronous DRAM (SDRAM):

With the advent of high-speed processors, system designers quickly felt the need to redesign a basic memory interface to run the memory bus faster than a MHz. These improved memory chips are called SDRAMs.

Rambus DRAM (RDRAM):

The Rambus protocol creates an independent control and address bus, which is transmitted over the A16 bit width data bus. Dual Data Rate (DDR) SDRAM: Unlike SDRAM memory support for one operation at each clock, DDR SDRAM memory can do two operations per clock, Threby dual bandwidth memory on a single data rate SDRAM.

Static RAM: –

Static RAM eventually contains internal Flip-Flops that store binary information. The stored information is always valid as long as the power is applied to the device.

Read-Only Memory (ROM): –

read-only memory (ROM) is a unit of memory that performs only read operations; This means that the binary information store ROM is permanent during hardware production of the unit and can not be changed by writing different words in it (nonvolatile). ROM is limited to reading words that are permanently stored in the cell.

Programmable Read Only Memory (PROM):

Programmable Read Only Memory (PROM) is a ROM that can be programmed to record information using an installation called Programmer Prom.Once the chip is programmed, the recorded information can not be modified, that is to say that the promo ball becomes the same ROM. erasable memory read-only memory is another type of ROM that can be removed and the seal can be reprogrammed to record different information using the special Prom-program installation.

Electronic erasable ROM of the Prom (EEPROM):

The electronic erasable ROM of the Prom (EEPROM) can be programmed and can be erased by electrical signals. It does not need to be exposed to ultraviolet light to erase its contents as EROM memory, and provides an easy way to load stored temporary or permanent information in the form of ROM.

Cache memory:

Cache is the high-speed memory available on the CPU to speed up access to data and instructions stored in RAM. The memory cache (sometimes referred to as the cache bank or RAM cache) is part of the high-speed static RAM (SRAM) memory rather than a slower, less expensive dynamic RAM (DRAM) for the main memory. Memory. The memory cache is valid because most programs have access to the same data or instructions over and over again. Keeping this information as much as possible in an SRAM, the computer avoids accessing the slower DRAM.

Secondary memory peripherals:

A secondary memory device is a V that is used to permanently store large amounts of data because the storage capacity of the main memory is limited and not permanent. The following are the functional features available for these days. (i) magnetic media: – hard disk, floppy disk. (II) optical media: – optical disks, CD, gigabytes (KBS), megabytes (MBS), Gigabyte (GBS) and megabytes (TBS), as we do for main storage.


floppy disk:

The floppy disk is one of the portable storage devices that are still in use. Floppy disks allow people to transfer small files between computers and store data / information as backups. A floppy disk is made of an elastic substance called a polyester film. They have a magnetic surface that allows data to be recorded. A standard floppy disk can store up to 1.44 MB of data equivalent to 300A4 paper size. Graphics or images can however stoe in it as graphic or image.



Hard disk storage stores information that is constantly rotated on one or more announced platters (or disks). These rotating discs are coated with magnetic materials and are stacked in the space between them. The information is recorded on the surface of the rotating disk. By tape as a small magnetic spot. These skulls are mounted on incoming and outgoing weapons. The information is recorded in a striped manner. Each band of information on a given disk is called a track. The storage capacity of the hard drive is in GB today, and the most common is GB to GB.


Compressed disc (CD):

A CD-ROM is an optical medium. These disks are relative chips and have a storage capacity of up to MB. There are 3 main types of CDS. It is used only for storing information and not for storing data. The optical drive is reported at a speed of 48X to 75x.

CD-R (recordable disc): Data can only be recorded on the disc in one part of the disc, while the other part is recorded at a later date. This disc can not be deleted. CD-RW (The CD-ROM can be rewritten): A CD-RW is an erasable disc that can be written multiple times. It surpasses the difficulty of writing on a CD. CD-RW discs are more like floppy disks / disks because the data is erasable and substitutable.


A DVD DVD is a disk storage device that looks like a CD, but has 15 times more storage capacity than a CD and is 20 times faster than a CD-ROM to transfer data to your computer. DVDs also have three truths. DVD-ROM digital video disc-read-only memory. DVD-ROM is a large capacity disk that can store 4.7 GB to GB.

The huge capacity makes them attractive for storing large amounts of data. DVD-R (recordable DVD). DVD-r similar to CD-r allows users to write multiple times, but read multiple times.Most rewritable DVD players are writable. People can erase them and read them many times. Because of their huge capacity, they replace CD technology.


CD / DVD player:

Pen / thumb reader – flash memory:

Pen / inch flash drive has recently seen another storage device. Thumb drive / pen player and phone today using Flash. Rinsing is a “solid state” memory that does not have a mobile part different from a magnetic storage device. Nor does it use lasers-unlike optical drives.


Please enter your comment!
Please enter your name here