The secret of Linux system hard disk expansion: physical connection VS virtualization, which one is faster and easier?

With the advancement of science and technology, computers have become an indispensable element in our daily lives. For computers, the performance of the hard disk is crucial to the fast operation of the overall system and the temporary storage of large amounts of data. Below, I, a seasoned system management expert, will conduct a detailed analysis and comparison on how to add a hard disk to a Linux system.

1. Add the background of the hard disk

Hello! When the daily data volume gradually increases, it is necessary to upgrade the hard drive capacity to adapt. Introduction to the Linux operating system in the Linux system environment, you can add a hard disk through many methods, such as directly replacing the physical hard disk or using virtualization technology.

2. Physical device connection

Physical device connection is one of the simple and conventional operating methods. For example, just connect the newly purchased hard disk to the computer host through the SATA or SCSI port, and use the corresponding power cord and data cable to make an accurate connection.

3.Virtualization technology

In recent years, virtualization technology has developed rapidly. Its advantage lies in its ability to simulate a single physical device into a variety of virtual devices. In a Linux environment, with the help of virtualization software such as VirtualBox or VMwareadding a hard disk to the Linux system, you can easily expand the hard disk of the system. This is both efficient and environmentally friendly, making full use of system resources.

4. Steps to add a hard disk

When using physical hardware interfaces to connect, the first task is to confirm that the hard disk has been successfully connected to the host. Afterwards, it is crucial to identify the newly added hard disk in the Linux environment. You can use the "lsblk" command to obtain the hard disk information and record the new device name.

5. Format and mount the hard disk

When you find a new hard disk, please first use the `fdisk` command to complete the preliminary partition, then use the `mkfs` sequence to perform format processing, and finally use the `mount` function to mount the hard drive to the specified location.

6.Performance evaluation

After adding the hard drive, the next step is to evaluate its performance. You can try to use the hdparm tool recommended online to easily detect the read and write speed and latency of the hard disk. If you feel it is not accurate enough, you might as well add a real-time performance monitoring assistant, iostat, to fully understand the operating status of the hard disk.

7. Comparison of different methods

The physical expansion method is simple and straightforward, but it requires the purchase of special hardware and has limited scalability; the virtualization function is more practical and will occupy some system resources. Please find the best hard drive expansion solution based on your specific needs and budget.

Through the interpretation of this evaluation and comparison articleAdd a hard disk in Linux system, I believe that everyone will have a deeper understanding of the various methods of adding hard disks in Linux systems and their performance differences. Whether it is physical hardware access or the use of virtualization technology, each method has its own advantages and is suitable for specific situations. I sincerely hope that you can select the hard disk addition strategy that best meets your expectations based on your personal needs, and try your best to improve the performance and data storage capacity of your computer system.

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