Brewedcoffee,   The H200 in your T110 II will support up to 2 Virtual Disks, so if your existing Raid 1 is all that is configured then you should be able to create another Raid 1 with the new 2TB drives.   Let me know if this helps.  
Hi, I have a Dell PowerEdge T110 II server in production with 1TB of space that is quickly running low. It is configured for RAID 1 using the H200 controller. I would like to add on an additional 2TB drive as separate storage. Can I add two 2TB drives and also configure these in RAID 1 mode? Or am I limited to only having RAID 1 configured for the main set of 1TB drives? I'm just not sure what the limitations are and what the best option is here for adding more storage. I'd appreciate any insight on potential options and the best way forward. Thanks!
Add additional storage to PowerEdge T110 II [currently 1TB RAID 1 with H200 
controller]