Intel modular server: add volume group to proxmox without power off

Hi to all.
I have one intel modular server, with 2 server inside and 8 disk.
I need to expand the disk space, so I've bought other 8 SAS disk.
Putting inside the IMS chassis and create storage pool is not a problem.
Now the question is: can I add the virtual drive (using the Shared LUN functionality) to both server without power off them?
Will the kernel/server support this ?

thanks in advice