Combine 2 RAID 1 Volumes

I have a DL4100 that originally came with 2 4TB drives configured in RAID 1. I then added 2 2TB drives, also configured in RAID 1. When I did this it created a second RAID Volume. Is there a way to combine these 2 Volumes so that all 4 drives are on a single RAID 1 Volume?

Thanks.

No. You can’t create a raid volume that spans (and fills) mismatched drive-sizes.