Reduce VM's disks

[Frigg]

Hello,

I would like to reduce by 3T0 the 500 VM's hard disk size.
Based on the documentation
https://pve.proxmox.com/wiki/Resize_disks
I entered the command "qm resize 500 vitrio0 -3000G" and "qm resize 500 vm-500-disk-1 -3000g"
It doesn't work:
Unknown option: 3000g
400 unable to parse option
> how can I downsize a VM's hard disk

> how to find disk name ?



> The pool is a LVM-Thin. I don't undersand why Vm's disks are raw and not thin. I don't understand how it works reading documentation. If you could explaine...




Thanks for help
Hervé

 

[bbgeek17]

LVM is block level storage. It is raw. So what you are seeing is correct.

As you can see from this page: https://pve.proxmox.com/pve-docs/qm.1.html

qm resize <vmid> <disk> <size> [OPTIONS]

Shrinking disk size is not supported.

Very few storage systems support shrinking. But you really need to start shrinking from the upper layer - file system side. Even fewer file systems support shrinking. Dont do it - you will corrupt your data.

You should create a new disk and migrate the data.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[Frigg]

Thanks for your answer.
Well I've manage to do it once, but can't remember all the steps I followed.
I just remember Idetached the disk, so it gets unused.
Then created a new disk.
But can't remember how I linked the unused disk to the new disk and make it bootable
Thanks for helping