https://www.turnkeylinux.org/ → Turnkey applications based on LXC

The Windows VirtIO drivers can be found at: https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/ The version to be chosen depends on Windows installation. Older Windows versions need older driver packages.

• Before you can change the disk type, the drivers must be installed.
• Add a small SCSI disk and reboot the server.
• Check if there is a triangle in the device manager
• shutdown the server
• detach and remove the small disk
• detach your OS disk
• add your OS disk and change the device type to SCSI
• also change the boot order

Now it should work, that you can boot from your disk attached as SCSI disk. SCSI is normally faster then VirtIO for Windows OS.

pct enter <container ID>
# Example: 
pct enter 101

qm disk import <VM-ID> </path/to/image.qcow2> <storage-name>
# Example: 
qm disk import 103 /mnt/pve/samba/import/Rocky-10-GenericCloud-Base.latest.x86_64.qcow2 zpool

After the import is DONE the this is marked as unused disk at the VM. With an double click it could be added. Also the boot order must be adjusted.

Datacenter → Options → Next Free VMID Range