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Add Existing Data Disk to a VM in Azure

In this lab, you’ll act as an Azure administrator who must retire a VM but preserve the application’s data. You’ll identify and detach a managed data disk from the source VM, then attach that disk—containing a test text file—to a replacement VM in the same resource group, confirming the file remains intact after attachment. By the end, you’ll understand the end‑to‑end lifecycle of Azure VM data disks and how to move them safely between VMs.

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Lab platform
Lab Info
Level
Beginner
Last updated
Dec 04, 2025
Duration
30m

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Table of Contents
  1. Challenge

    Prepare an existing data disk for reuse

    Identify a data disk attached to a source VM and make it available for reassignment by removing it from the VM configuration.

  2. Challenge

    Attach the existing disk to a new virtual machine

    Associate the previously detached managed disk with a destination VM so it can be recognized and accessed by the operating system.

  3. Challenge

    Verify disk availability and access stored data

    Confirm the disk is detected within the OS on the destination VM and validate that the original data remains accessible.

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