Lenovo IdeaCentre B520 Lenovo IdeaCentre B5 Series User Guide - Page 42

Special considerations for troubleshooting Windows, Further Technical Explanation - recovery

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Problem: The capacity of the hard disk, as indicated by the system, is less than the nominal capacity. Troubleshooting and problem resolution: For computers equipped with the OneKey Recovery feature, the system recovery feature needs to occupy some hard disk space. This may account for the apparent hard disk capacity deficit. Further Technical Explanation: The nominal capacity of the hard disk is expressed in the decimal system, 1000 bytes. But the actual hard disk capacity is expressed in the binary system as 1024 bytes (For example, the nominal capacity 1G is 1000M, while the actual capacity 1G is 1024M). The capacity of the hard disk shown in Windows can be calculated according to the calculations in the following example: The nominal capacity of the hard disk is 40G, while its actual capacity should be: 40 x 1000 x 1000 x 1000/(1024 x 1024 x 1024) = 37G. If the Service partition of 3G - 3 x 1000 x 1000 x 1000/(1024 x 1024 x 1024) = 2.79G is subtracted, the capacity of the hard disk shown in the system can be obtained. The capacity of the hard disk as calculated using this method may be slightly different from the actual capacity due to the rounding of totals. 5.5 Special considerations for troubleshooting Windows Record the following information that may later be useful in troubleshooting system problems: 1. The serial number of the software. The serial number was shipped with the computer and was provided separately by the manufacturer. The Help Center is unable to retrieve this number. 2. The drivers for this computer model only support the Windows 7 system. 3. When you use the Windows Media Center to watch TV, be particularly attentive to the following: • In the following two situations, you must re-save a channel list: a. When you change your TV signal from digital to analog, your saved channel list for digital TV is deleted. When you want to watch digital TV again, you must create and save a new channel list. b. When you change your TV signal from analog to digital, your saved channel list for analog TV is deleted. When you want to watch analog TV again, you must create and save a new channel list. User Guide 37

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37
User Guide
Problem:
The capacity of the hard disk, as indicated by the system, is less than
the nominal capacity.
Troubleshooting and problem resolution:
For computers equipped with the
OneKey Recovery feature, the system recovery feature needs to occupy some
hard disk space. This may account for the apparent hard disk capacity deficit.
Further Technical Explanation:
The nominal capacity of the hard disk is
expressed in the decimal system, 1000 bytes. But the actual hard disk capacity is
expressed in the binary system as 1024 bytes (For example, the nominal capacity
1G is 1000M, while the actual capacity 1G is 1024M).
The capacity of the hard disk shown in Windows can be calculated according to
the calculations in the following example:
The nominal capacity of the hard disk is 40G, while its actual capacity should
be: 40 x 1000 x 1000 x 1000/(1024 x 1024 x 1024) = 37G.
If the Service partition of 3G - 3 x 1000 x 1000 x 1000/(1024 x 1024 x
1024) = 2.79G is subtracted, the capacity of the hard disk shown in the
system can be obtained.
The capacity of the hard disk as calculated using this method may be slightly
different from the actual capacity due to the rounding of totals.
5.5 Special considerations for troubleshooting Windows
Record the following information that may later be useful in troubleshooting system
problems:
1. The serial number of the software. The serial number was shipped with the
computer and was provided separately by the manufacturer. The Help Center is
unable to retrieve this number.
2. The drivers for this computer model only support the Windows 7 system.
3. When you use the Windows Media Center to watch TV, be particularly attentive
to the following:
•
In the following two situations, you must re-save a channel list:
a. When you change your TV signal from digital to analog, your saved
channel list for digital TV is deleted. When you want to watch digital TV
again, you must create and save a new channel list.
b. When you change your TV signal from analog to digital, your saved
channel list for analog TV is deleted. When you want to watch analog TV
again, you must create and save a new channel list.