I would like to make sure the hdd's are attatched to the VM correctly everytime with its UUID. Would create a /etc/qemu-server/<vmid>.conf be the way to do it? I could edit that file with the 4 UUID's but I am not sure of the format I need to do this in. Please let me know how I can or if there is a better method thanks!
[h=2]How can I assign a physical disk to a VM?[/h] You don't have to do anything at host level (i.e. not add to fstab or anything), just set is as available directly to the KVM guest:
qm set <vmid> -ide# /dev/sdb
Or:
qm set <vmid> -ide# /dev/disk/by-id/[your disk ID]
...since having the drive letter change (should you add a drive) might have unintended consequences.
Also see /etc/qemu-server/<vmid>.conf if you want to add it editing the conf file by hand (i.e. adding ide1: /dev/sdb2). After that you can run the VM as usual, and you will have the new storage device available inside it. Beware that you can't assign it to more than one running VM if the filesystem is not designed for such scenario.