What is Storage A look at Storage We know computers can store large amounts of data We measure the storage capacity of different storage media by using certain units of measurements For example when we talk about how much gasoline a fuel tank can hold we say a specific amount of ID: 542242
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Slide1
Units of Storage
What is StorageSlide2
A look at Storage
We know computers can store large amounts of data. We measure the storage capacity of different storage media by using certain
units of measurements
.
For example when we talk about how much gasoline a fuel tank can hold we say a specific amount of
litres
.
Likewise, when we talk about how much data can be stored on a storage media (flash drive for example) we usually use the term
byte
.Slide3
Types of Units of StorageSlide4
Answer these questions in your book
What is a bit?
What is a byte?
What is a character?
What is a word?
What is the word length?
Page 31. Log on to IT for CSECSlide5
Class Activity
Draw table 3.1 (Units of Storage) on page 31
Slide6
Bill Nye (BITS)Slide7
Copy this table
UNIT
ABBREVIATION
APPROXIMATE VALUE
ACTUAL VALUE
Bit
b
Byte
B
Kilobyte
KB
1 000 bytes
1024
bytes
Megabyte
MB
1 million bytes
1024 KB
Gigabyte
GB
1 billion bytes
1024 MB
Terabyte
TB
1 trillion bytes
1024 GBSlide8
Quick Question….
Can you manipulate the units of storage?
Answer these questions:
Convert 1.2MB to KB
Express 2 TB as MBSlide9
Solutions
Convert 1.2MB to KB
Sol:
1 MB = 1024 KB
1.2 MB = 1.2 X 1024 KB
=1228.8 KB
So 1.2 MB = 1228.8 KBSlide10
Express 2 TB as MB
Sol:
1 TB = 1024 GB and 1 GB = 1024 MB
2 TB = 2 X 1024 GB = 2048 GB
2048 GB = 2048 X 1024 MB = 2097152 MB
So 2 TB = 2 097 152 MBSlide11
Video- The digital computerSlide12
Class Activity
Using the table in your textbook, write down the 8-bit equivalent for the letters of your name.
Example- SAM
S - 01010011
A - 01000001
M – 01010011
Then complete the following sentence in your book. Hi. My name is < bit combination> and I am <bit combination> years old.Slide13
Home Work
1.What is a
bistable
device?
2.Check
your
cell phone and write down:
a) TOTAL storage capacity
b) TOTAL space utilized
c) Available space
d) Size of Pictures folder
e) Size of Audio folderSlide14
Soon we will
be looking at
different storage media and compare their storage capacity
USB flash drives hard drives
Memory cards floppy disk
etc……..Slide15
Past Paper Question
Jan 2011 Q2 (b)
John has an external hard drive with a capacity of 1 terabyte (TB) and Mary has a USB flash drive with a capacity of 16 gigabytes (GB). Calculate how many flash drives of information, similar to Mary’s, can be accommodated on John’s external hard drive.
(2 marks)