Yes. You can do it using OMSA also. Refer below link with details on that [URL] 
2 disks were configured as RAID 0 by mistake.  It should be RAID 1.  The volume has production data on it.  The server is Dell PE 740xd with Perc H740p mini.  By looking at the available tasks for the VD it has an option "Reconfigure".  Can I use it to convert?  I saw some posts to convert RAID 0 to RAID 1 by adding a new disk.  In my case both disks are already in RAID 0.  Can I still convert?  Is there a step by step instruction or video available?  I assume the converting process won't cause data lose by design. Thanks, David
Convert existing RAID 0 with 2 disks to RAID 1