How is Storage Capacity measured in computer system?

The storage capacity of a computer system is measured in bytes,Kilobytes(KB),Megabytes(MB),
Gigabytes (GB),and Terabytes(TB).One byte is one character of Information,and is comprised
of eight bits(or eight digital 1″s or 0″s).All computers  require storage space and memory to run
programs files.


Meaning of “Storage” in computer system:

All computers require Storage Space and Memory to run program and store files.In a computer system, “storage” is the place where the data is held in an electromagnetic or optical form.The stored data is made available for subsequent  hold storage are collectively known as storage media.The hard disk is the most common type of storage devices in all computers .However ,most people use a combination of storage devices.

Different Types of Storage Devices:

There are mainly two types of storage devices: 1.Primary storage and 2.Secondary Storage.Primary storage holds data in memory (RAM) and secondary storage holds data on hard disk ,tapes,and other 
devices requiring input/output operations.Primary Storage is also called main storage,and secondary storage is also called auxiliary storage.Main storage is necessary to keep files internally on the computer , and auxiliary storage is necessary to back -up , transfer and archive data. In addition to RAM ,primary storage includes read only memory-ROM and L1 and L2 cache memory .In addition to hard disks, secondary storage includes floppy disks, magnetic tapes, optical discs ,pen drives,zip drives, media cards, and external hard disks.

How is the main memory connected to the CPU?

The main memory is connected to the CPU via memory buses-an address bus, a data bus and control  bus. A bus or data path is a group of electrical conductors suitable for carrying computer signals from one location to another.First,through an address bus, the CPU sends a number (called memory address) that indicates the desired location of data.Then, it reads and writes the data itself using data bus.Subsequently , it is passed to the control unit for necessary manipulation over a control bus.

What are Optical Storage devices?

The optical storage device involves the use of a 5″ disc, from which data is read by laser .There are three types of optical storage devices: Compact Disc( CD), Digital Versatile Disc (DVD),and Blu-Ray Disc(BD).Optical media can be read only ( such as commercial software ,music or movie disks), or writable.Writable compact disc can be either CD-R or CD-RW .


What is tertiary Storage?

Tertiary storage is a type of storage device ,primarily useful for storing extraordinary large data.Typical examples includes tape libraries and optical jukeboxes.The data shared here is organized in a catalog database.The computer needs to consult the database to determine which tape or disc contains the information.The entire process makes it much slower than secondary storage devices,and hence it is used for archiving rarely accessed information.

What is a server?

A server is also a computer that provides client stations which access to files and principles ,as shared resources to a computer network.There are many different types of servers.One of the most common type is a file server ,which is a storage device dedicated to storing files.Any user on the network can store files on the server.

How is storage capacity measured?

The storage capacity of a computer system is measured in bytes,Kilobytes(KB),Megabytes(MB),
Gigabytes (GB),and Terabytes(TB).One byte is one character of Information,and is comprised
of eight bits(or eight digital 1″s or 0″s).All computers  require storage space and memory to run
programs files.Technically, a kilobyte is 1024 bytes, a Megabyte is 1024 KB, a gigabyte is 1024 MB,and a terabyte is 1024 GB.However,some measures of hard disk capacity often take 1 MB to be 1,000,000 bytes (not 1,024,768) and so on.


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