text: **Unmanaged mode**
  An access mode in which an external storage MDisk is not configured in the system, so no 
  operations can be performed. See also “Image mode” on page 778 and “Managed mode” on 
  page 780. 
  
  **Virtualization**
  In the storage industry, virtualization is a concept in which a pool of storage is created that 
  contains several storage systems. Storage systems from various vendors can be used. The 
  pool can be split into volumes that are visible to the host systems that use them. See also 
  “Capacity licensing” on page 772. 
  
  **Virtualized storage**
  Virtualized storage is physical storage that has virtualization techniques applied to it by a 
  virtualization engine. 
  
  **Virtual local area network**
  Virtual local area network (VLAN) tagging separates network traffic at the layer 2 level for 
  Ethernet transport. The system supports VLAN configuration on both IPv4 and IPv6 
  connections. 
  
  **Virtual storage area network**
  A virtual storage area network (VSAN) is a logical fabric entity defined within the storage area 
  network (SAN). It can be defined on a single physical SAN switch or across multiple physical 
  switched or directors. In VMware terminology, the VSAN is defined as a logical layer of 
  storage capacity built from physical disk drives attached directly into the ESXi hosts. This 
  solution is not considered for the scope of our publication. 