Attaching a Additional Data Disk to Azure VM

 

In This Document We Are Going To creating, attaching, mounting, and detaching an additional data disk in an Azure Virtual Machine.

Things Should Be Known Before Starting.......

What Is OS Disk ?

The Operating System Disk is the primary disk attached to a VM and contains the operating system files, Created automatically when you provision a VM.

What is Data Disk ?

A data disk is an additional disk that you manually attach to a VM for storing application data, logs, databases, or custom files, Optional and can be added anytime.

Question : I’ve Created a new Azure virtual machine with a 30 GB of disk size. However, I’ve noticed an additional 4 GB disk is already mounted at /mnt ?

Answer : Azure Linux VMs often come with a temporary disk, typically mounted at /mnt or /mnt/resource. You didn’t explicitly create it because Azure adds it by default during VM provisioning. It's part of the VM's infrastructure and not billed separately.

Step 1) Create a Virtual Machine

• Describe all helping commands from blog
• Link : Click_Me

Step 2)  Create and Attach a New Data Disk

• Create A Data disk
• Attach the Disk to the VM

Step 3) Prepare the Disk for Use

• Create a New Partition
• Reboot The VM
• Format the Partition
• Create a Custom Mount Directory
• Temporarily Mount the Disk
• Permanently Mount via /etc/fstab

Step 4) Detach the disk without losing the data.

• Unmount the Disk from the VM
• Remove the Entry from /etc/fstab
• Detach the Disk via Azure Portal