Explanation of hard disk capacity
Dear user,
While using your computer, you may find that the nominal hard disk
capacity indicated is somewhat different from the disk capacity
displayed by the operating system. For example, a nominal 80GB hard
disk will appear as less than 80GB in the operating system. This
discrepancy is not an error in hard disk installation nor any other
problem, but a normal phenomenon of computers. This phenomenon is
primarily due to the following reasons:
I. Different standards used by the manufacturer and operating
system when calculating hard disk capacity
Hard disk manufacturers use a radix of 1000, i.e., 1G = 1,000MB, 1MB =
1,000KB, 1KB = 1,000 bytes. However, when identifying hard disk capacity,
operating systems use a radix of 1024, i.e., 1GB = 1,024MB, 1MB = 1,024KB,
1KB = 1,024 bytes. The standard adopted by your computer is that of the
hard disk manufacturers. Since the standards adopted by the hard disk
manufacturer and operating system are different, the hard disk capacity
displayed by the operating system will be different from the nominal hard
disk capacity.
For example, if the hard disk is nominally X G, even when it is completely
empty, the capacity displayed by the operating system will be:
X × 1000 × 1000 × 1000/ (1024 × 1024 × 1024)
≈
X × 0.931 G
Summary of Contents for IdeaPad U455
Page 1: ...U455 User Guide V1 0 cover_1 4 Lenovo IdeaPad U455 User Guide V1 0 ...
Page 6: ......
Page 20: ...6 Chapter 1 Getting to know your computer Bottom view b f a e d c ...
Page 39: ...Chapter 2 Learning the basics 25 Special keys and buttons a b c d ...
Page 126: ...112 Appendix E Notices Lenovo Product Service Information Japanese VCCI Class B Statement ...
Page 140: ......
Page 142: ...New World New Thinking TM www lenovo com Lenovo China 2009 P N 147003082 Printed in China ...
