Hello!!! Yes its possible, you can create one more RAID1 with your new 2x4T disks. There is no restriction on creating RAID1 virtual disk or any other RAID level. you can create any RAID level virtual disk multiple tilmes, untill you reach MAX Virtual disk configuration. please let me know if you have any question!!! Thanks, Neeraj
Hello Dell I've got a poweredge R320 with 2X500GB disks configured as RAID1. I am about to place an order with Dell for 2x4T disks to add to the server. My question is: Is it possible to RAID1 the new 2x4T disks while  there is already an existing RAID1 disk setup on the server?
second RAID1 setup on existing server