So the r510 dell server has a 8 drive chassis. Currently there are total of 6 drives, (2) 250GB for OS set to RAID 1 and (4) 1TB drives for data set to RAID 10. So I can purchase (2) more 1TB drives, break the RAID 10 and configure RAID 6. So if I have (6) 1TB drives, I should have 5TB of storage available since 1 drive is considered a hot spare? or do i have this wrong?