[SOLVED] The current guest configuration does not support taking new snapshots

[alasdairc]

Hi all,

I've had a look through the threads for users who have experienced the same issues with being unable to take snapshots on VM's, however, my VM's are using the qcow2 virtual disk format.

It weirdly seems limited to just the Windows Servers, however, Windows 10 Pro and Linux servers seem to be fine.

I am posting the 'qm config $VMID' outputs below:


VM on Host 1 with issues (Windows Server):

agent: 1
bios: ovmf
boot: order=scsi0;ide2;net0
cores: 2
efidisk0: local:102/vm-102-disk-0.qcow2,efitype=4m,pre-enrolled-keys=1,size=528K
ide2: none,media=cdrom
machine: pc-q35-7.2
memory: 4096
meta: creation-qemu=7.2.0,ctime=1679519398
name: LC-PRX-C01-DFS
net0: e1000=76:F3:4D:3C:CA:A6,bridge=vmbr1
numa: 0
ostype: win11
scsi0: local:102/vm-102-disk-1.qcow2,cache=writeback,iothread=1,size=40G
scsi1: local:102/vm-102-disk-3.qcow2,cache=writeback,iothread=1,size=20G
scsihw: virtio-scsi-single
smbios1: uuid=f667a6dc-dad1-48d3-a2f8-4440f26efe90
sockets: 1
tpmstate0: local:102/vm-102-disk-2.raw,size=4M,version=v2.0
vmgenid: b812728d-bbaf-434f-b9a2-8afe1501d77c

VM on Host 2 with issues (Windows Server):

agent: 1
bios: ovmf
boot: order=scsi0;ide2;net0
cores: 4
efidisk0: VM-OS:103/vm-103-disk-0.qcow2,efitype=4m,pre-enrolled-keys=1,size=528K
ide2: none,media=cdrom
machine: pc-q35-7.2
memory: 4096
meta: creation-qemu=7.2.0,ctime=1680386899
name: LC-PRX-H01-CA
net0: e1000=BE:3E:A4:9C:68:CA,bridge=vmbr1
numa: 0
ostype: win11
scsi0: VM-OS:103/vm-103-disk-1.qcow2,cache=writeback,iothread=1,size=60G
scsihw: virtio-scsi-single
smbios1: uuid=4f98cd1e-6982-46aa-af1c-5a51c5d1f75c
sockets: 1
tpmstate0: VM-OS:103/vm-103-disk-2.raw,size=4M,version=v2.0
vmgenid: 92a81946-fc53-40d7-b5e7-a56b092c17f6

VM on Host 3 with issues (Windows Server):

agent: 1
bios: ovmf
boot: order=ide0;sata0;net0
cores: 2
efidisk0: local:101/vm-101-disk-0.qcow2,efitype=4m,pre-enrolled-keys=1,size=528K
ide0: NFSBackup:iso/SERVER_EVAL_x64FRE_en-us.iso,media=cdrom,size=4925874K
machine: pc-q35-7.2
memory: 6144
meta: creation-qemu=7.2.0,ctime=1678445601
name: LC-PRX-H02-DC01
net0: e1000=FE:C1:18:54:7E:68,bridge=vmbr1
numa: 0
onboot: 1
ostype: win11
sata0: local:101/vm-101-disk-1.qcow2,cache=writeback,size=60G
scsihw: virtio-scsi-single
smbios1: uuid=fee663d3-a14d-4277-a573-43936fc5231c
sockets: 1
tpmstate0: local:101/vm-101-disk-2.raw,size=4M,version=v2.0
vmgenid: 5858c8ae-3dea-42c3-8603-8cf8c6525f49

Working VM (Windows 10):

agent: 1
boot: order=ide2;sata0;net0
cores: 2
ide2: none,media=cdrom
machine: pc-i440fx-7.2
memory: 6144
meta: creation-qemu=7.2.0,ctime=1678720375
name: LC-PRX-C01-JUMP01
net0: e1000=0A:13:57:F4:5C:F9,bridge=vmbr1
numa: 0
onboot: 1
ostype: win10
sata0: local:150/vm-150-disk-0.qcow2,cache=writeback,size=80G
scsihw: virtio-scsi-single
smbios1: uuid=5e0496e2-7567-4c70-8ca8-2e718692b26a
sockets: 1
vmgenid: d0e0274d-b9f9-4278-9ff3-ba46d01a4b26

Any help would be great, thanks!

 

[leesteken]

The TPM State (tpmstate0) is in RAW-format and does not support snapshots. I have no experience with this but maybe it's a known issue or maybe you can change the format?

 

[alasdairc]

The TPM State (tpmstate0) is in RAW-format and does not support snapshots. I have no experience with this but maybe it's a known issue or maybe you can change the format?

Ah! Thank you for pointing that out... unfortunately, I don't seem to be able to edit the TPM State.

I might try powering off a test VM, remove the TPM State and tinker around with it and see what happens.

Thanks again

EDIT: I'll report back

 

[alasdairc]

The TPM State (tpmstate0) is in RAW-format and does not support snapshots. I have no experience with this but maybe it's a known issue or maybe you can change the format?

I've found a workaround by moving the TPM storage to the onboard lvm volume - I believe it's due to the storage type I am using for my VM OS disk not supporting raw snapshotting.
Thanks for pointing me in the right direction!

 

[matrix1999]

I am running into the same problem. I am currently running Proxmox 8.3.2, and from all the threads that I have read, it looks as though the culprit is that the Windows TPM's disk is in RAW format and therefore, cannot create snapshots.

Is there any way that we can convert the TPM disk to .qcow2?