  Advantages of host-based shadowing? (RAID) 
 The Question is:
 
What are the advantages for using Volume Shadowing as software RAID ?
 
 
 The Answer is:
 
  Primarily, the permitted separation distance between the volumes.
  Host-based shadow sets can span storage controllers and OpenVMS
  host systems and (in OpenVMS Cluster configurations) even hundreds
  of miles...
