Disk Partitioning

 

Introduction:

Disk partitioning is a crucial aspect of managing storage in a Linux environment. Understanding how to create partitions, update partition tables, and mount them properly is fundamental to efficient system management. In this article, we'll explore the concept of partitions, guide you through creating a partition using the `fdisk` command in a Red Hat-based distribution, show you how to update partition information using `partprobe`, and explain the processes of temporary and permanent mounting using `mount` and `fstab`.

Understanding Partitions:

A partition is a logically separated portion of a physical storage device like a hard drive or SSD. Partitions allow you to organize and allocate space for different purposes, such as system files, user data, and applications. They help optimize storage utilization and improve system performance.

Creating Partitions using `fdisk`:

To create a partition using the `fdisk` command, follow these steps:

1. Open a terminal and enter:

•    sudo fdisk /dev/sdX

 

   Replace `sdX` with the appropriate device name.

2. Press `n` to create a new partition.

3. Choose the partition type (usually primary or extended).

4. Specify the partition size.

5. Press `w` to write the changes.

Updating Partition Tables using `partprobe`:

After creating a partition, update the partition table using `partprobe`:

• sudo partprobe /dev/sdX

Temporarily Mounting Partitions using `mount`:

To temporarily mount a partition, use the `mount` command:

• sudo mount /dev/sdX1 /mnt

Replace `sdX1` with the actual partition and `/mnt` with the desired mount point.

Making Permanent Mounts using `fstab`:

For permanent mounts, you can use the `/etc/fstab` file:

• sudo vi /etc/fstab

Add a line like:

• /dev/sdX1   /mnt/data   ext4    defaults    0   2

Save and exit. Use the `mount -a` command to apply changes.

Conclusion:

Disk partitioning is a crucial skill for effective system management. You've learned what partitions are, how to create them using the `fdisk` command, update partition tables with `partprobe`, and mount partitions temporarily and permanently using `mount` and `fstab`. With this knowledge, you can efficiently manage storage resources, enhance system performance, and maintain a well-organized Linux environment.

Questions for Further Exploration:

1. What are the benefits of disk partitioning in a Linux system?

2. Can you explain the difference between primary and extended partitions?

3. How does updating the partition table using `partprobe` impact the system?

4. What is the purpose of the `/etc/fstab` file, and how does it relate to permanent mounts?

5. What precautions should be taken before creating, updating, or mounting partitions to avoid data loss?