WEEK/TERM: THIRD TERM /WEEK 2
DATE: 16.05.2020
CLASS: Grade 4
SUBJECT: COMPUTER SCIENCE
TOPIC: STORAGE DEVICES
Reference:
Brief explanation
Alternatively referred to as digital storage, storage media, or storage medium, or storage device is any hardware capable of holding information either temporarily or permanently.
Types of storage devices are: primary storage devices and secondary storage devices.
1.) Primary storage devices:
A primary storage device is a medium that holds memory for short (temporarily) periods of time while a computer is running. Although it has a much lower access time and faster performance, it is also about two orders of magnitude costlier than secondary storage.
RAM (random access memory) and cache are both examples of a primary storage device. Primary storage’s key difference from the others is that it is directly accessible by the CPU, it is volatile, and it is non-removable.
2.) Secondary storage:
A secondary storage device refers to any non-volatile storage device that is internal or external to the computer. It can be any storage device beyond the primary storage that enables permanent data storage. A secondary storage device is also known as an auxiliary storage device or external storage.
Examples of permanent storage devices
- Hard Drive Disk
- Floppy Disk
- Tape
- Compact Disc (CD)
- DVD and Blu-ray Discs
- USB Flash Drive
- Secure Digital Card (SD Card)
- Cloud Storage
Exercises/Assignments
- What are storage devices?
- List the types of storage devices.
- List 7 examples of permanent storage devices.
- The ______________ stores data temporarily.