How to clear a QCOW2, to restart VM install from scratch?

[MrPete]

I thought this would be a simple thing, yet find no docs nor examples:

• I want to do the equivalent of reformatting and/or removing all partitions from a QCOW2 file assigned to a VM
• Why? I started installing a VM, messed it up, and want to start over without redoing the entire hardware config

This is quite simple in non-virtualized systems. What's the trick in Proxmox?

Thanks!

 

[bbgeek17]

Delete the disk and create a new one.

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

 

[MrPete]

Doable, but not available in the GUI. At that point, it's about as easy to delete the entire VM and start over (which is what I finally did, copying and pasting the MAC so I didn't have to redo the assigned static IP in my DHCP server...)

 

[LnxBil]

This is quite simple in non-virtualized systems. What's the trick in Proxmox?

Why don't you use the same technique for PVE? My current go to is just a blkdiscard.

 

[bbgeek17]

Doable, but not available in the GUI.

You can certainly detach/delete/create a disk in GUI.

---

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

 

[BobhWasatch]

Or just change the boot options to boot from the installer ISO and reinstall just like you'd do on hardware.

 

[MrPete]

Why don't you use the same technique for PVE? My current go to is just a blkdiscard.

AWESOME!!! That's perfect! I was looking for something like this, never found it in searching the thin-provisioned info. Soooo easy.