text: **6.2.3 Creating arrays**
  
  Only MDisks (RAID arrays of disks) can be added to pools. It is not possible to add JBOD or a 
  single drive. Then, when assigning storage to a pool, the system first needs to create one or 
  many MDisks. You cannot create MDisks out of internal drives without assigning them to a 
  pool. 