Flex-RAID Flex-RAID architecture has two major advantages: • Support multiple volumes per ReadyNAS. • RAID level can be selected for maximum capacity, redundancy, or performance. The NETGEAR Flex-RAID technology allows you to choose from among several industry-standard RAID levels: • JBOD. This most basic RAID level does not protect your data from loss if one of your drives fails. JBOD is available only on volumes consisting of a single hard disk. • RAID 0.