Backup vzdump unused drive

[alezzand]

Hi to all,
I'm wondering if there is someone that knows how to include an unused drive (disk) when backing up a VM.

When I try the backup, either using the GUI or the command line,

vzdump 151 --node MyPve --storage MyStorage --mode snapshot --remove 0 --compress zstd

the unused disk I have in the VM and where I have important informations is ever excluded, as the log says:

INFO: skip unused drive 'vmdata-zfs:vm-151-disk-0' (not included into backup)

Note that, in the configuration the disk is marked to be backupped.
I looked through the manual, but I didn't found anything about this.

Moreover, there is no chance to save this unused disk elsewhere because a clone doesn't include it either...

Does anyone how to make it possible?

 

[apoc]

What's the point in detaching the disk anyways. If it is important why isn't it attached?
Another option might be to create a different VM which is simply powered off. Attach the disk there and backup it this way.
Hope that makes sense ...