I'm running a Proxmox 9 Beta cluster to test the new LVM shared storage snapshot feature (using iSCSI via a TrueNAS server).
Unfortunately, I'm unable to create a snapshot of the VM on that storage.
What am I doing wrong?
Your VM-100-Disk-2 is raw, and is only allowed to be qcow2. Seems like a vTPM-disk.
I personally also did not set "Use LUNs directly" not sure, if its a requirement though.
You're right! The VM does have a vTPM, but currently there's no alternative to using "RAW" mode, and modern systems like Windows Server 2025 require a TPM.
I just created a test VM without a RAW device, and it works now.
There really needs to be a proper solution for this going forward... otherwise, it's going to become a problem.