Please enable JavaScript.
Coggle requires JavaScript to display documents.
PRIMARY AND SECONDARY STORAGE DEVICE …
PRIMARY AND SECONDARY STORAGE DEVICE 
Primary Memory
Primary memory is computer memory that is accessed directly by the CPU. The primary memory stores instructions. It is important to understand primary memory generally holds currently executing processes
RAM
-
RAM is a form of computer memory that can be read and changed in any order, typically used to store working data and machine code.
DRAM
Stands for Dynamic RAM. It is a type of semiconductor memory that is typically used for the data or program code needed by a computer processor to function
SRAM
Stands for Static RAM. It provides faster access to data and is more expensive than DRAM. SRAM is used for a computer's cache memory and as part of the random access memory digital-to-analog converter on a video card.
-
ROM
PROM
stands for Programmable ROM can be programmed using a special hardware device called a PROM
programmer or PROM burner.
EPROM
Erasable Programmable ROM. EPROM can be erased and then programmed using special electrical signals or UV
rays.
EEPROM
EEPROM stands for electrically erasable programmable read-only memory and is a type of non-volatile memory used in computers, integrated in microcontrollers for smart cards and remote keyless systems, and other electronic devices to store relatively small amounts of data but allowing individual bytes to be erased and reprogrammed.
UVEPROM
Ultra-Violet Erasable Programmable Read Only Memory is a special type of Programmable Read-Only Memory that can be erased by exposing it to ultraviolet light and programmed again with new data.
-
Can only be read by the processor. Data to be stored into
ROM is written during the manufacturing phase itself.
They contain data that does not
need to be altered, like a booting sequence of a computer or algorithmic tables for
mathematical applications. ROM is slower and hence cheaper than RAM.
Secondary memory
Secondary memory refers to storage devices, such as hard drives and solid state drives. It may also refer to removable storage media, such as USB flash drives, CDs, and DVDs.
Fixed Device
A Fixed storage is an internal media device that is used by a computer system to store data, and usually these are referred to as the Fixed Disks drives or the Hard Drives.
CD/DVD Drive
A DVD is a type of optical media used for storing digital data. It is the same size as a CD, but has a larger storage capacity. Some DVDs are formatted specifically for video playback, while others may contain different types of data, such as software programs and computer files.
CD stands for Compact Disk. CDs are circular disks that use optical rays, usually
lasers, to read and write data.
-
Hard Disk Drive
The hard disk drive is made up of a series of circular disks called platters arranged
one over the other almost ½ inches apart around a spindle. A hard disk drive is a non-volatile computer storage device containing magnetic disks or platters rotating at high speeds.
Removable Device
Removable Device is any type of storage device that can be removed from a computer while the system is running.
Pen Drive
Pen Drive is a portable memory device
solid-state state memory rather than magnetic
fields or lasers to record data. It uses a
technology similar to RAM, except that it is nonvolatile
Blue Ray Disk
Blu Ray Disk (BD) is an optical storage media used to store high definition (HD) video and other multimedia filed. Blu ray disk has a shorter wavelength laser as compared to CD/DVD.
-
-
-
-
-
-
-
-