Expand Ubuntu Disk in Hyper-V after quick create

Posted by sudo
Expand Ubuntu Disk in Hyper-V after quick create

If your Ubuntu VM disk is too small after using Hyper-V Quick Create, follow these steps to expand it properly.

Step 1: Expand the Virtual Disk in Hyper-V

  1. Turn off the VM.
  2. Open Hyper-V Manager, go to Settings → Hard Drive → Edit, and increase the disk size.
    • If “Edit” is disabled, delete any Checkpoints in the Checkpoint section.

Step 2: Resize the Partition in Ubuntu

Start the VM.

Install required tools

sudo apt install cloud-guest-utils

Set locale to English (if using a different language)

LC_ALL=C

Expand the partition to use the free space

sudo growpart /dev/sda 1

Note: The space between sda and 1 is necessary because growpart takes them as separate arguments.

Resize the filesystem to match the new partition size

sudo resize2fs /dev/sda1

This step ensures that the filesystem (ext4 in most Ubuntu setups) expands to fill the newly resized partition. Unlike growpart, resize2fs refers to /dev/sda1 as a single entity, so there is no space.

Step 3: Verify the Changes

Check updated disk space

df -h

    Your Ubuntu VM now has more disk space! 🚀

    Source: Anton Karl Ingason

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