Resize Proxmox VM disks
1. Resizing guest disk
General considerations
When you resize the disk of a VM, to avoid confusion and disasters think the process like adding or removing a disk platter.
If you enlarge the hard disk, once you have added the disk plate, your partition table and file system knows nothing about the new size, so you have to act inside the VM to fix it.
gnome proxmox
If you reduce (shrink) the hard disk, of course removing the last disk plate will probably destroy your file system and remove the data in it! So in this case it is paramount to act in the VM in advance, reducing the file system and the partition size. SystemRescueCD comes very handy for it, just add its iso as cdrom of your VM and set boot priority to CD-ROM.
Shrinking disks is not supp...