Lenovo G555, G455 manual Explanation of hard disk capacity, Dear user

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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 40GB hard disk will appear as less than 40GB 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

In addition, if a portion of the hard disk space has been used for some specific purpose, then the capacity indicated by the operating system will be even less than X × 0.931 G.

II.A portion of the hard disk space is used for specific purposes

Lenovo computers may come with preinstalled OneKey Rescue System, so the hard disk has a special portion partitioned before delivery, which is used to store hard disk mirror and OneKey Rescue System program files. The size of the reserved space for this partition varies according to the model, operating system and software of the computer. For the sake of safety, this partition is not apparent, which is commonly referred to as a “hidden partition”.

In addition, after the hard disk is partitioned or formatted, the system will assign a certain amount of hard disk space for the system files.

For the above reasons, the available hard disk space indicated by the operating system is always less than the computer’s nominal hard disk capacity.

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Contents Lenovo G455/G555 First Edition January Copyright Lenovo Respective Users Explanation of hard disk capacity Dear userContents Important safety information „ Read this firstUnpack Working placeImportant safety information On usingService and upgrades Getting to know your computer „ Lenovo G555„ Lenovo G455 Getting to know your computerPower button Specific models onlyModels only Computer display TouchpadKensington slot Fan louversRJ-45 port VGA portRight-side view Optical driveSpeakers „ Lenovo G555 „ Lenovo G455Microphone jack Headphone jack Bottom view Battery latch manual Battery pack Memory/Wireless „ Connect to the power „ Configure the operating systemLearning the basics „ Read the manualsLearning the basics „ Shutting down your computerPutting your computer into sleep state Using AC adapter and battery „ Checking battery status„ Charging the battery „ Removing the battery pack„ Handling the battery Left click buttonG455 „ Numeric keypadG555 „ Function key combinations „ OneKey Rescue System button OneKey Rescue System button aSystem status indicators „ Using VeriFace „ Using passwords„ Attaching a security lock not supplied Utility„ Using memory cards not supplied „ Connecting a universal serial bus USB deviceInserting a memory card Removing a memory cardPairing with a Bluetooth enabled device Enabling Bluetooth communicationsTo send files from the computer to the paired device Using the computer network „ Software configurationWireless network technology connect without wiring „ Hardware connection„ Using Wi-Fi/WiMax specific models only Using the computer networkEnabling wireless connection Hardware connection Wi-Fi/WiMax networkOneKey Rescue System OneKey Rescue System„ Introduction Troubleshooting Frequently asked questionsWhat can I do if the backup process fails? TroubleshootingWhen do I need to restore the system to the factory status? Password problem Display problemsKeyboard problems Troubleshooting Sleep or hibernation problems Computer screen problemsTroubleshooting Sound problems Battery problemsHard disk drive problem Startup problemTroubleshooting Other problems Your computer does not respond„ To replace the battery Upgrading and replacing devicesUpgrading and replacing devices Handling a hard disk driveUpgrading and replacing devices 111 Upgrading and replacing devices Removing the optical drive Upgrading and replacing devices Appendix A. Getting help and service Getting help on the WebAppendix A. Getting help and service Getting help around the worldWarranty Service Telephone Numbers Appendix B. Use and care information „ Be careful about where and how you work„ Notice of static-electricity „ Be gentle with your computer „ Carry your computer properly„ For outdoor use „ Handle storage media and drives properly„ Take care in setting passwords „ Data safety„ Other important tips Accessibility and comfort „ Ergonomic information„ What if you are traveling? „ Questions about vision?„ General tips for maintenance „ Cleaning your computer keyboard „ Cleaning the cover of your computer„ Cleaning your computer display Appendix C. Lenovo limited warranty „ What this warranty covers„ How to obtain warranty service „ What your service provider will do to correct problems„ Replacement of a product or part Appendix C. Lenovo limited warranty„ Your additional responsibilities Information„ Use of personal information „ What this warranty does not cover„ Limitation of liability „ Other rights „ Dispute resolution„ European Economic Area EEA „ Lenovo Turkey address Lenovo Technology B.V. Turkiye Istanbul Subesi„ Types of warranty service Customer Replaceable Unit CRU Service On-site ServiceCourier or Depot Service Customer Carry-In or Mail-In ServiceAppendix C. Lenovo limited warranty Product Exchange Service Appendix D. Customer replaceable units CRUs Appendix E. Notices „ Export classification notice Appendix E. NoticesWindows Windows XPWindows Vista Wireless related information „ Wireless interoperability„ Safety information related to Mobile Broadband „ Usage environment and your healthElectronic emissions notices „ Federal Communications Commission FCC Statement„ Avis de conformité à la réglementation d’Industrie Canada „ Industry Canada Class B Emission Compliance Statement„ German Class B Compliance Statement „ European Union Compliance Statement Class B Compliance „ Japan Compliance Statement for Power line Harmonics „ Korea Class BWeee and recycling statements „ General recycling statementEU Weee statements „ Disposing of a Lenovo Computer ComponentsAppendix E. Notices Factory preinstalled Wireless LAN/WiMAX module Appendix F. Lenovo regulatory noticeLenovo regulatory notice „ Read first regulatory informationII. Preinstalled integrated Bluetooth module Appendix F. Lenovo regulatory noticeFactory preinstalled Wireless LAN modules II Preinstalled integrated Bluetooth module„ Canada Industry Canada IC IC Certification numberModules de réseaux local sans fil pré-installé à l’usine II Module Bluetooth intégré préinstalléIV Exposure of humans to RF fields RSS-102 Numéro d’homologation IC„ Electronic emission notices Federal Communications Commission FCC StatementTested To Comply With FCC Standards „ Europe EU Declaration of ConformityAppendix F. Lenovo regulatory notice Appendix F. Lenovo regulatory notice For model BCM94313HMG2L For model AR5B95 For model BCM943225HM For model BCM92046MDGEN Declaration of Conformity Restriction de bande de fréquence de l’Union Européenne EU Frequency band restriction Περιορισμός ζώνης συχνοτήτων ΕΕ Begränsning för EU-frekvensband Takmarkanir ESB á tíðnisviði Restrizzjoni fuq il-faxxa tal-frekwenza ta’ l-UE „ Notice for users in Ukraine „ Notice for users in Pakistan„ Notice for users in Morocco „ Notice for users in in Croatia For model BCM943225HMFor model BCM94313HMG2L For model AR5B93 For model AR5B95 For model BCM92046MDGEN „ Notice for users in Brazil BCM94313HMG2L„ Notice for users in Saudi Arabia For model AR5B95 For model AR5B93 For model BCM943225HM For model BCM92046MDGEN „ Notice for users in UAE „ Notice for users in India „ Notice for users in Indonesia„ Notice for users in Malaysia „ Notice for users in the Philippines„ Notice for users in Singapore For model BCM94313HMG2L For model AR5B95„ Notice for users in Thailand „ Notice for users in Taiwan100 BCM94313HMG2L, AR5B95, AR5B93, BCM943225HM, BCM92046MDGEN „ Notice for users in South Africa Appendix G. Features and specifications Trademarks Index 105106 Do not Return IT to the Store New World. New Thinking.TM