I recently purchased a second-hand EX4, and installed 4x 4TB Seagate Ironwolf disks in it. I selected to format it as a RAID 1, and was expecting to get one volume of 4TB of storage, with a fault tolerance of 3 disks. What I got instead was two volumes of 4TB each, with a total storage of 8TB.
This does not seem to be a true RAID 1 configuration. This seems to be either a RAID 01, or a RAID 10. Since there is already a RAID 10 option, I reckon it is a RAID 01. But in no way can this be a true RAID 1.
Please correct me if I’m wrong, as it seems that I can only be either very correct, or I can be very confused.