1. Storage

2. Storage Technology
Electronic devices that store, retrieve, and save instructions and data.
Today’s microcomputers or PCs include several types of storage devices.
Capacity and speed are important considerations when selecting a new storage device for a PC.

3. Storage Technology Magnetic storage devices
store data by magnetizing particles on a disk or tape. They have a limited life-span of 1 to 5 years, depending on the device.
Magnetic storage is non-volatile
Ex: Hard drive
Optical storage devices store data as light and dark spots on the disk surface. stores information in deformities on the surface of a circular disc and reads this information by illuminating the surface with a laser diode and observing the reflection
Optical disc storage is non-volatile
Ex: CD CDROM. DVD

4. Storage Technology
Semiconductor :- uses semiconductor-based integrated circuits to store information. A semiconductor memory chip may contain millions of tiny transistors or capacitors. Both volatile and non-volatile forms of semiconductor memory exist
RAM For volatile
non-volatile semiconductor memory known as flash memory

5. Storage Devices Computer storage devices :
 The storage devices are one of the most important components of the computer system, these devices that are used in the computers to store the data. computer has many types of data storage devices. Some of them can be classified as the removable(flash Memory, external hard, Floppy Disk) data Storage Devices and the others as the non-removable (RAM, Internal Hard)data Storage Devices.
The data Storage Devices also come in many sizes and shapes.

6. Cont. Device storage either volatile memory or non-volatile memory,
volatile memory is the kind of the memory that is erasable and the non volatile memory is the one where in the contents cannot be erased.
Example :
Primary memory such as RAM , Cache (Volatile)
Secondary Memory such as Hard Disk, Flash memory (Non-volatile)
Therefore non volatile much:-
Cheaper
Slower

7. Storage Technology
Electronic devices that store, retrieve, and save instructions and data.
Today’s microcomputers or PCs include several types of storage devices.
Capacity and speed are important considerations when selecting a new storage device for a PC.

8. Storage Technology Magnetic storage devices
store data by magnetizing particles on a disk or tape. They have a limited life-span of 1 to 5 years, depending on the device.
Magnetic storage is non-volatile
Ex: Hard drive
Optical storage devices store data as light and dark spots on the disk surface. stores information in deformities on the surface of a circular disc and reads this information by illuminating the surface with a laser diode and observing the reflection
Optical disc storage is non-volatile
Ex: CD CDROM. DVD

9. Storage Technology
Semiconductor :- uses semiconductor-based integrated circuits to store information. A semiconductor memory chip may contain millions of tiny transistors or capacitors. Both volatile and non-volatile forms of semiconductor memory exist
RAM For volatile
non-volatile semiconductor memory known as flash memory

10. Storage Devices Hard Disk Drives
Capacity is measured in gigabytes (GB or billions of bytes).
Typically permanently installed.
Used to store operating system, application software, utilities and data.
Magnetic storage device.

11. Storage Devices CD-ROM Drives
Typically installed on all new computer systems. (Were add-on device until the mid 1990’s).
Capacity is 600 to 750 megabytes (MB or millions of bytes).
Most mass-produced commercial software is packaged on a CD.

12. RAM (Random Access Memory)
“Waiting room” for computer’s CPU.
Holds instructions for processing data, processed data, and raw data.
Ram is measured by:
Capacity (in Megabytes or Gigabytes)
Speed (in Nanoseconds)

14. Magnetic tape

15. Semiconductor

16. Optical disk