Lesson Objectives:Research the need for for internal and removable storage anddescribe different technologies that can be used for data storage.Learning Outcomes:I will be able to select a storage device and media for a purposeand justify the choice.(Gold)I will be able to describe different technologies that can be usedfor data storage. (Silver)I will be able to explain the difference between internal andremovable storage. (Bronze)
Storage Device• Any device which is used to store data is called a STORAGE DEVICE• There are different types of STORAGE DEVICES and each with its purpose and use.• Data is input using an output devices.• The data is then processed by the CPU before being output through an output device.
Choosing the correct storage device and media.• Capacity-the amount of data to be stored.(file sizes)• Speed-how quick the user want to access data.• Portability-does the data needs to be moved from place to place (eg home, work, school)• Durability- how long the data can be stored and accessed from media without loss or being corrupted• Reliability-if the data can always be accessed in the format it was saved.
Internal Devices • These are the storage devices which are inside a computer case.Advantages:When computer is moved it will retain most of its maindata.Disadvantages:If the hard drive fails all the data and applications will belost.
External Drives • These are connected to the computers using a cable that is plugged into suitable interface. eg USBAdvantages:Data can easily be moved between location.They can allow safe backup of internally stored data.Disadvantages:Data transfer is slower.The occupy space.The life is small because of plugging and unplugging.
Types of Storage Media• There are three types of storage media and these are:• SOLID STATE• OPTICAL STATE• MAGNETIC STATE
Research about a storage device from the list.Present your findings about each Definition:device using the subheadings on the Type of storage:right. Data Access: Cost of Storage:• Hard Disk (magnetic) Capacity:• Magnetic Tape(magnetic) Speed: Portability:• CD(magnetic) Durability:• DVDs(magnetic) Reliability• Flash Memory(solid state)