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Useful for Pre-service teacher training of University of Pune.
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Prof.S.G.Isave,Assistant Professor,Tilak College of Education,Pune-India
Storage Devices
Storage Devices
Primary Storage ROM ChipsRAM Chips
• Secondary Storage –• 1. Optical – • CD/DVD/BRD• 2. magnetic – • Pen Drive• Memory Card• Hard Disc
Primary Storage Devices
• ROM –• Read Only Memory.• Permanent memory.• Non-volatile memory.• Can’t be edited.• Stores important
program from system software, regarding functioning of computer. (Booting)
• RAM – • Random Access
Memory.• Volatile memory.• Temporary memory.• Holds data up to saving.• Bring required
programs when user opens a file.
Secondary Storage capacity
• Compact Disc – 700MB• Digital Versatile Disc – 4 to 8GB• Blue Ray Disc – 25 GB• Hard Disc – 5 to 500 GB• Pen Drive – 2 GB to 8GB +• Memory Card – 2GB to 8GB +
OPTICAL DEVICES- CD/DVD/BRD
Type Write Edit Re burn
R- Recordable Yes No Limited
RW- Rewritable. Yes Yes Yes
ROM – Read Only Memory.
No No No
MAGNETIC Devices
Type Write Edit Reuse
Hard disc Yes Yes Yes
Pen Drive Yes Yes Yes
Memory Card Yes Yes Yes
Use of Optical Devices
• CD/DVD/BRD (R) – To store data permanently.
• CD/DVD/BRD (RW) – to store data temporarily, to carry data.
• CD/DVD/BRD (ROM) – software, educational program, movies, drivers, games etc.
Use of Magnetic Devices
• Hard disc – Essential part of a computer.• Useful to store system, all application software,
drivers, data and information.
• Mass Storage Devices – • To carry data.• To store data temporarily.• Can carry all type of data i.e. software, music,
video file, presentation, images, photos
