Storage Pool for virtualization

Hello

We have 4 hosts with 3 disks of 1TB each

We have setup software RAID and grouped those disks together on each machine. On top of software Raid, we setup LVM with one single LV.

Our question now is, is there a way to group the 12 disks together? (3 disks of 1TB x 4 machines)?

Is clvm supposed to do that or is there another way?

Thanks in advance