Increase Disk Space on Proxmox VM

Overview

To increase disk space on a Proxmox VM, two steps are required: growing the partition and resizing the filesystem¹.

Commands

1. Grow the partition:

growpart /dev/sdX Y

Where:

• sdX is the disk device (e.g., sda, sdb)
• Y is the partition number

2. Resize the filesystem:

resize2fs /dev/sdXY

Where:

• sdXY is the specific partition (e.g., sda1, sdb2)

Prerequisites

The growpart command requires the cloud-utils package to be installed¹.

Important Notes

1. The VM must be running for these commands to work
2. Always backup important data before resizing partitions
3. This process works for ext4 filesystems; other filesystems may require different tools

Footnotes

1. Ask Ubuntu - Resize Partition ↩ ↩²