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Created November 8, 2025 14:48
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Increase proxmox VM's storage
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README.md

In proxmox UI

  • In the VM (running or stopped): Hardware > Hard disk, on the toolbar Disk action > Resize
image
  • Set the number of GBs to add, then validate
  • Start the VM if not already

In VM console

  • Install partitionning tool: apt install parted
  • Find the disk name (in my case: sda): lsblk (you can only increase the partition size of the last one)
# lsblk 
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda      8:0    0   270G  0 disk 
├─sda1   8:1    0     3M  0 part 
├─sda2   8:2    0   124M  0 part /boot/efi
└─sda3   8:3    0 199.9G  0 part /
  • Print and get the last partition number (in my case: 3): parted /dev/sda print
  • Extend the partition size: parted /dev/sda resizepart 3 100% and type yes
# parted /dev/sda resizepart 3 100%
Warning: Partition /dev/sda3 is being used. Are you sure you want to continue?
Yes/No? yes
Information: You may need to update /etc/fstab.
  • Refresh the file-system: partprobe /dev/sda
  • Finally apply the new config: resize2fs /dev/sda3
  • Enjoy! (no need to reboot)
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