By : Reem Hasayen. A storage device is a hardware device capable of storing information. There are two types of storage devices used in computers 1. Primary.

Slides:



Advertisements
Similar presentations
Components of a computer system
Advertisements

1 Introduction to Computers Prof. Sokol Computer and Information Science Brooklyn College.
SECTIONS 13.1 – 13.3 Sanuja Dabade & Eilbroun Benjamin CS 257 – Dr. TY Lin SECONDARY STORAGE MANAGEMENT.
Storage Devices and Media
Memory. When we receive some instruction or information we retain them in our memory. Similarly a computer stores the instructions for solving a problem,
Computers Are Your Future Eleventh Edition Chapter 2: Inside the System Unit Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall1.
Computer Fundamentals
The two types of storage: Primary Storage Secondary Storage
1 Lesson 1 Computers and Computer Systems Computer Literacy BASICS: A Comprehensive Guide to IC 3, 4 th Edition Morrison / Wells.
Storage.
Computer Hardware and Software Jinchang Wang. Hardware vs. Software Hardware is something tangible. Computer hardware includes electronic circuitry and.
Computing Hardware Starter.
 Design model for a computer  Named after John von Neuman  Instructions that tell the computer what to do are stored in memory  Stored program Memory.
1 Secondary Storage Management Submitted by: Sathya Anandan(ID:123)
MAC OS – Unit A Page: 10-11, Investigating Data Processing Understanding Memory.
CHAPTER 5. Next Exit Main Memory and Backing Storage Devices... Main Memory and Backing Storage Devices... Main memory temporarily stores programs and.
Storing Data: Electronic Filing Cabinets What You Will Learn Difference between memory and storage How storage media are categorized Measuring a storage.
Introduction to Computers
1 Introduction to Computers Prof. Sokol Computer and Information Science Brooklyn College.
WHAT IS COMPUTER STORAGE? Computer storage is the storing of data in an electromagnetic form to be accessed by a computer processor.
Computer Hardware Information Technology Week 5 and 6
GCSE Information Technology Storing data Data storage devices can be divided into 2 main categories: Backing storage is used to store programs and data.
Memory  Main memory consists of a number of storage locations, each of which is identified by a unique address  The ability of the CPU to identify each.
TheTeacher Computing Data Storage Computing. TheTeacher Computing Primary Storage One of the fundamental properties of a computer is that it can store.
Overview of Physical Storage Media
3 Computing System Fundamentals
2.1 Operating System Concepts Chapter 2: Computer-System Structures Computer System Operation Storage Structure Storage Hierarchy Hardware Protection General.
Module 1: Concepts of information Technology.  Central processing unit (CPU)  Hard disk  Common input and output devices  Types of memory Main Parts.
Components of a Computer System
1 Course Title: IT IN BUSINESS Course Instructor: ADEEL ANJUM Chapter No: 04 1 BY ADEEL ANJUM (MCS, CCNA,WEB DEVELOPER)
COMPUTER MEMORY & DATA STORAGE. ROM ROM is short for Read Only Memory. –I–It is permanent, long-term memory which cannot be erased or changed in any way;
Storage of Data Instructions and data are held in main memory which is divided into millions of addressable storage.
© GCSE Computing Computing Hardware Starter. Creating a spreadsheet to demonstrate the size of memory. 1 byte = 1 character or about 1 pixel of information.
Understanding Memory.
Computer Systems. Bits Computers represent information as patterns of bits A bit (binary digit) is either 0 or 1 –binary  “two states” true and false,
A memory is just like a human brain. It is used to store data and instructions. Computer memory is the storage space in computer where data is to be processed.
Memory and Storage Aldon Tom. What is Memory? Memory is a solid-state digital device that stores data values. Memory holds running programs and the data.
Storage devices 1. Storage Storage device : stores data and programs permanently its retained after the power is turned off. The most common type of storage.
Memory The term memory is referred to computer’s main memory, or RAM (Random Access Memory). RAM is the location where data and programs are stored (temporarily),
Getting Ready for OHS Open Heart Surgery!. What’s a PC? Personal Computer –These computers were originally designed by IBM in the 70s. Your computer at.
Levi Garner. Topics  Computer Storage Devices  Storage Media and Storage Devices  Memory and Storage.
Prospects of Software Industry in Bangladesh Natasha Ahmed – Maliha Tasnim – Anamika Almas Storage Devise Natasha Ahmed.
MEMORY is part of the Central Processing Unit, or CPU, where data and information are stored. There are two main types of memory in a computer – RAM.
1 Lesson 1 Computers and Computer Systems Computer Literacy BASICS: A Comprehensive Guide to IC 3, 3 rd Edition Morrison / Wells.
Computer Storage. What is Primary Storage? ● Primary storage is computer memory that is directly accessible to the CPU of a computer without the use of.
Computer System Structures Storage
STORAGE DEVICES Towards the end of this unit you will be able to identify the type of storage devices and their storage capacity.
Memory Miss Elliott.
Chapter 2: Computer-System Structures
Unit 1 PRIMARY STORAGE DEVICES LECTURE – 7
STORAGE DEVICES Towards the end of this unit you will be able to identify the type of storage devices and their storage capacity.
Storage devices of Computer Submitted By Pravesh Kumar UPS Beetia
Memory chips Memory chips have two main properties that determine their application, storage capacity (size) and access time(speed). A memory chip contains.
Introduction to Computers
COMPUTER MEMORY & DATA STORAGE
Introduction to Computers
COMPUTER MEMORY & DATA STORAGE
Chapter 7.
STORAGE DEVICES Towards the end of this unit you will be able to identify the type of storage devices and their storage capacity.
Secondary Storage Devices
Introduction to Computers
GCSE OCR 4 Storage Computer Science J276 Unit 1
GCSE OCR 3 Memory Computer Science J276 Unit 1
2.C Memory GCSE Computing Langley Park School for Boys.
Computer Hardware Ms. Wade.
Lesson 9 Types of Storage Devices.
COMPUTER FUNDAMENTALS i
AS Level ICT Selection and use of storage requirements, media, and devices: storage and storage capacity Unit 1 Topic a - Selection and use of storage.
Objectives Describe the difference between RAM and ROM
Explorer Inside the Computer
Presentation transcript:

By : Reem Hasayen

A storage device is a hardware device capable of storing information. There are two types of storage devices used in computers 1. Primary storage device such as RAM and Cache 2. Secondary storage device such as a computer hard disk drive

 Also known as internal memory and main memory.  primary storage is a storage location that holds memory for short periods of times while the computer is on. For example, computer RAM and Cache.

 RAM 1. Smaller amount (typically 128MB-1 GB) 2. Temporary storage of files and programs. 3. Contents disappear when you turn off power to the computer. 4. Consists of chips ( microprocessors)  Hard Drive 1. Much larger amount (typically 1 GB- 400 GB ) 2. Permanent storage of files and programs. 3. Contents remain when you turn off power to the computer. 4. Consists of hard disks ( platters)

 RAM 5. Contents are stored electronically in bits on the chips, in electronic offs and ones (0’s and 1’s), so RAM needs electrical power to hold information.  Hard Drive 5. Contents are stored magnetically, also in bits which are offs and ones or (0’s,1’s),so the hard drive does not need power to hold information.

 This type of memory has 4 fundamental features: 1. Speed. 2. Capacity. 3. Volatility. 4. Random.

 Information in RAM is stored based on electrical signals….so to change information simply requires sending different electrical signal to the chip. This happened very fast.  Using the hard drive need to move a physical object “ head” that is spinning to the right position, this is very slow

 This mean that data loaded into RAM is only stored temporarily until the PC is turned off

 Advantages : Fast  Disadvantages: 1. “Forgets” when you turn the computer off. 2. more expensive than the hard drive storage.

 This memory is an ultra fast memory that allow the CPU to perform certain operation in very brief period of time.  It takes information from RAM memory and send it directly to the CPU to be executed.

 The hard drive also called “Storage” or “ Disk Space” and its measured by (MB) or (GB)  Hard drive consist of a metal platter which spin very fast.  As it spins the hard drive head moves along the platter and can read and write information.

 Advantages: 1. relatively cheap. 2. can turn off the computer and reload the information later  Disadvantages: since it’s a mechanical device( spinning platter) it can be slow.

 Spindle Rotation Speed  Seek Time

 On each of the platters there is a thin layer of magnetic film.  Data storage on hard disks is very similar to that of a cassette tape.  Data is stored in many 1's and 0's. These binary digits are arranged in different ways to represent different characters.

 DNpQ