J21101 Intro to Computers Care for computers and Secondary Storage Media

1. Ajarn Jojo Carrillo
How to Take Care of Computers,
Peripherals and Storage Devices

2. Different Storage Media and
Devices
Media Devices
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3. Floppy Disk
 a disk of thin and flexible magnetic
storage medium usually plastic
 sealed in a rectangular plastic with
fabric that removes dust particles
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4. Compact Disc (CD-R CD-ROM)
 The compact disc, or CD for short, is an
optical disc used to store data
 CD-ROM (Read-Only Memory) is made from
a 1.2 mm thick disc of polycarbonate plastic,
with a thin layer of aluminum to make a
reflective surface
 CD-R (Recordable) also known as Write-
Once made of polycarbonate plastic coated
with a very thin layer of dye. And is coated a
thin, reflecting layer of silver, a silver alloy,
or gold
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5. 5
http://www.youtube.com/watch?v=ESpL4a08kVE

6. Thumb Drive or Flash Drive
 They are smaller, faster, have
thousands of times more capacity
than the floppy disk and CD
 more durable and reliable because
they have no moving parts
 A flash drive consists of a small
printed circuit board carrying the
circuit elements and a USB connector
protected inside a plastic, metal, or
rubberized case which can be carried
in a pocket or on a key chain
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7. Hard Disk Drive
 A hard disk drive (HDD) is a data storage device using
rapidly rotating discs (platters) coated with magnetic
material
 The coating consists of various metallic (mostly non-
magnetic) alloys
 Newer internal and external hard drives have memory
chips than rotating platters
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8. Comparison of Storage Capacity
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Storage Media/Device Capacity
Floppy Disk 100 Kb - 1.44 Mb
CD-R (DVD-R) 720 Mb (4 Gb)
Flash Drive 16 Gb
Hard Drive 1 Tb
Name Number of Bytes Amount of Text
Kilobyte (KB) 210 or 1,024 1/2 page
Megabyte (MB) 220 or 1,048,576 500 pages or 1 thick book
Gigabyte (GB) 230 or 1,073,741,824
500,000 pages or 1,000 thick
books
Terabyte (TB) 240 or 1,099,511,627,776 1 million thick books
Source: http://www.wisegeek.org/how-much-text-is-in-a-kilobyte-or-

9. How to take care of storage
media
1. Do not touch the media
inside.
2. Keep away from magnets.
3. Do not put heavy objects on
the media.
4. Protect from heat, dust,
water and other things that
can damage the media.
5. Do not bend or stack to avoid
scratching the surface.
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10. Taking care of your
computer and peripherals
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11. Activity
 What parts of a person functions in a similar way to the
parts of a computer?
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MOUSE
CPU
KEYBOAR
D
MONITO
R

12. Why do we take care of
computers?
 Why do you take care of your body?
 If a computer is well taken care of, it will serve us better for
a longer period of time.
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13. Clean inside and out
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14. Computers in the school and at
home
 What do you do when the computer at school is faulty?
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15. Rules in the computer laboratory
 Do not bring food and other drinks in the computer
laboratory.
 (add some more rules)
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16. Appendix
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 Pearson, Longman (2011 Rp). “Computer Applications:
Secondary 1” (32-38). Singapore: Pearson Education South
Asia Pte Ltd.