Debian 8.9 restore deleted but locked files

I accidently ran rm -R /home/. My Homefolder contained several disks of virtual machines which were in use at this moment. I also got the error, that some files could not have been deleted. Nevertheless, I cannot access the files in my /home/ folder anymore.

Looking for a solution I found out, that I could try to restore the files with cp /proc/PID/fd/12 /target/.

Now I am a little bit confused - as the virtual machine is still working it probably writes to the disk which I am trying to recover.

Will I have inconsistencies in those disks? Or do you maybe have another hint?

I appreciate every kind of help!

Thank you very much!