Lenovo 57323748, B550 manual Explanation of hard disk capacity

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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 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 for 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 B550 First Edition January Copyright Lenovo Dear user Explanation of hard disk capacity Contents Important safety information Important safety information„ Read this first UnpackImportant safety information Correct usage proceduresService and upgrades Getting to know your computer Getting to know your computer Power button System statusSelect models only TouchpadGetting to know your computer Fan louversRJ-45 port VGA portUSB port Optical driveSpeakers Microphone jack Headphone jackManual Battery pack Battery latchSpring loaded Hard disk drive „ Connecting to the power „ Configuring the operating systemLearning the basics „ Reading 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 button„ Numeric keypad „ Function key combinationsLearning the basics OneKey Rescue system button System status indicators E f„ Using passwords „ Using VeriFace„ Attaching a security lock not supplied Connecting external devices „ Connecting a universal serial bus USB device„ Connecting a Bluetooth enabled device select models only Enabling Bluetooth communications„ Software configuration Using the Internet„ Hardware connection Wireless connection „ Using Wi-Fi/WiMAXUsing the Internet Enabling wireless connectionOneKey Rescue system „ IntroductionTroubleshooting Frequently asked questionsTroubleshooting What can I do if the backup process fails?Display problems Password problemTroubleshooting Sleep or hibernation problems Computer screen problemsTroubleshooting Sound problems Battery problemsHard disk drive problem Startup problemTroubleshooting Other problems To replace the battery, do the following Replacing the batteryUpgrading and replacing devices Replacing the hard disk drive Upgrading and replacing devicesHandling a hard disk drive To replace the hard disk drive, do the followingUpgrading and replacing devices To install an SO-DIMM, do the following Upgrading and replacing devices Removing the optical drive To remove the optical drive, do the followingUpgrading and replacing devices Appendix A. Getting help and service Calling the customer support centerAppendix A. Getting help and service Getting help around the worldLenovo warranty service telephone numbers Warranty Service Telephone Numbers„ Be careful about where and how you work Appendix B. Use, and care informationCaring for your computer „ 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 „ What if you are traveling? „ Ergonomic information„ 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 problemsAppendix C. Lenovo limited warranty „ Replacement of a product or part„ Your additional responsibilities „ Use of personal information „ What this warranty does not cover„ Limitation of liability „ Other rights „ Dispute resolution„ European Economic Area EEA „ Suplemento de Garantía para México „ 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 Energy Star model informationWindows XP Wireless related information „ Wireless interoperability„ Safety information related to Mobile Broadband „ Usage environment and your healthTV tuner information Appendix E. Notices Electronic 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 Weee and recycling statements Türkiye EEE Yönetmeliğine Uygunluk BeyanıTurkish statement of compliance EU Weee statements Japan recycling statements„ Disposing of a Lenovo Computer Components Appendix E. Notices Appendix F. Features and specifications Trademarks Index Index Page Do not Return IT to the Store New World. New Thinking.TM

B550, 57323748 specifications

The Lenovo B550 (model number 57323748) is a versatile and efficient business laptop designed to meet the demands of professional users who require both performance and reliability. This model stands out in Lenovo's lineup due to its well-balanced combination of features, technologies, and characteristics, making it an ideal choice for both on-the-go professionals and office environments.

One of the key features of the B550 is its durable design. The laptop is built with robust materials that withstand the rigors of frequent travel while maintaining a sleek and professional appearance. The spill-resistant keyboard adds an additional layer of protection, ensuring that accidental spills won't jeopardize the device's functionality.

Under the hood, the Lenovo B550 is powered by a choice of the latest Intel or AMD processors, delivering exceptional processing power for multitasking and demanding applications. Coupled with generous RAM options, users can seamlessly run multiple applications without experiencing lag, making it an efficient tool for productivity.

The B550 also boasts impressive storage options, including solid-state drives (SSDs) that not only increase the speed of boot times and application launches but also enhance overall system performance. Users can choose from a variety of storage capacities to suit their needs, ensuring that they have ample space for files and applications.

Display quality is important for any laptop, and the B550 does not disappoint. It features a high-resolution display with vibrant colors and sharp details, ensuring that users can enjoy crisp visuals whether they're working on a presentation or watching multimedia content. Additionally, anti-glare technology helps reduce eye strain during extended use.

Connectivity is another strong point of the B550. The laptop comes equipped with a range of ports, including USB Type-C, HDMI, and various USB-A ports, allowing for easy connection to peripherals and external displays. Additionally, integrated Wi-Fi and Bluetooth technologies provide reliable wireless connectivity for internet access and device pairing.

Security features are also a priority for the Lenovo B550. The device includes a fingerprint reader and TPM (Trusted Platform Module) to protect sensitive data and ensure secure login. This is particularly important for business users handling confidential information.

In conclusion, the Lenovo B550 (57323748) is a well-rounded business laptop that emphasizes durability, performance, and security. Its combination of advanced technologies and user-friendly features makes it a solid choice for professionals seeking a reliable machine that can keep up with their fast-paced work environment.
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