Home System Tutorial LINUX How to add a new disk on Linux system

How to add a new disk on Linux system

Mar 28, 2024 am 11:56 AM
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Important: Please note that the purpose of this article is only to tell you how to create a new partition, and does not include partition expansion or other options.

Configure new disk

I use the fdisk tool to complete these configurations.

I have added a 20GB hard drive and mounted it to the /data partition.

fdisk is a command line tool used to display and manage hard drives and partitions on Linux systems.

# fdisk -l
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This command will list the current partition and configuration.

How to add a new disk on Linux system
View Linux partition details

After adding a 20GB hard disk, the output of fdisk -l is as follows.

# fdisk -l
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How to add a new disk on Linux system
View new partition details

The newly added disk is displayed as /dev/xvdc. If we were adding a physical disk, it would look like /dev/sda based on the disk type. Here I am using a virtual disk.

To partition on a specific hard drive, such as /dev/xvdc.

# fdisk /dev/xvdc
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Commonly used fdisk commands
  • n - Create partition
  • p - Print partition table
  • d - delete a partition
  • q - Exit without saving changes
  • w - Save changes and exit

Since we want to create a partition here, use the n option.

How to add a new disk on Linux system
Create a new partition on Linux

Create a primary partition or extended partition. By default we can have up to 4 primary partitions.

How to add a new disk on Linux system
Create primary partition

Enter the partition number as required. It is recommended to use the default value of 1.

How to add a new disk on Linux system
Assign partition number

Enter the size of the first sector. If it is a new disk, usually choose the default value. If you are creating a second partition on the same disk, we need to add 1 to the last sector of the previous partition.

How to add a new disk on Linux system
Allocate sectors to partition

Enter the value of the last sector or partition size. It is generally recommended to enter the size of the partition. Always add prefix to prevent value out of range errors.

How to add a new disk on Linux system
Allocate partition size

Save changes and exit.

How to add a new disk on Linux system
Save partition changes

Now use the mkfs command to format the disk.

# mkfs.ext4 /dev/xvdc1
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How to add a new disk on Linux system
Format new partition

After formatting is completed, follow the following command to mount the partition.

# mount /dev/xvdc1 /data
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Add entries in the /etc/fstab file to automatically mount on permanent boot.

/dev/xvdc1 /data ext4 defaults 0 0
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Summarize

Now you know how to use the fdisk command to create a partition on a new disk and mount it.

We need to be extra careful when dealing with partitions, especially when editing configured disks. Please share your feedback and suggestions.

About the Author:

My work includes IBM-AIX, Solaris, HP-UX multiple platforms and storage technologies ONTAP and OneFS, and I have experience with Oracle database.

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