drbd9 drbd drbdpool drbdthinpool

Hello, i have a 2 Node Proxmox Cluster running. I use drbd9 as storage. DRBD9 uses /dev/sdb (Raid10 with 4 Disks). Now i would like to add another disk ( /dev/sdc ) with fast SSDs. How can i create a 2nd storage Pool so that i can choose from the GUI where i want to create that VM? I read...