Originally this build was with a single 750GB dive and replaced with two 1TB WD Red wd10jfcx drives. One WD Red drive was added and Raid 1 was enabled. After the data replicated to the WD Red drive, the original drive was replaced with the second WD drive.
What I'm not sure about is listed capacities. Under RAID Group / RAID Group 1 capacity is listed at 927GB with the drive capacities listed at 931GB. However, under Volume, the capacity is listed at 889.9GB. That's a 38GB discrepancy, should I just delete the RAID Group and start over?