Fix Ubuntu “Not Enough Disk Space” on Proxmox | Expand LVM Root Disk Fast
Hit a “Not Enough Disk Space” error on Ubuntu inside Proxmox? In this video, I show the exact end-to-end process to expand a Proxmox VM disk, grow an Ubuntu LVM partition, and make enough room for the upgrade to continue.
This walkthrough covers the full chain from Proxmox disk expansion to Linux partition and filesystem growth, using the common LVM flow with growpart, pvresize, lvextend, and resize2fs.
0:00 - Introduction
0:11 - Description
1:59 - Resize Proxmox
2:26 - Resize Ubuntu
6:22 - Upgrade Ubuntu
7:36 - Conclusion
What you’ll learn:
How to increase the virtual disk size in Proxmox.
How to confirm the right disk and partition with lsblk and df.
How to expand the partition with growpart.
How to resize the LVM physical volume with pvresize.
How to extend the logical volume with lvextend.
How to grow the ext4 filesystem with resize2fs.
How to verify the final result cleanly before retrying the Ubuntu upgrade.
This video is for homelab users, sysadmins, and anyone running Ubuntu in Proxmox who needs a quick, practical fix without rebuilding the VM.
#Proxmox #Ubuntu #LVM
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Contents
0:00 - Introduction
0:11 - Description
1:59 - Resize Proxmox
2:26 - Resize Ubuntu
6:22 - Upgrade Ubuntu
7:36 - Conclusion