I am installing Proxmox on a HP DL380 which has a raid controller and 8 drives. I plan on putting all 8 drives on RAID 6 for speed and protection. I also want to run weekly snapshot backups to a USB connected external hard drive. Will that work or will there be problems running backups to a USB drive? Am I better off only using RAID 6 on 7 drives and using the 8th drive for backups?