text: **Local and remote fabric interconnect**
  The local fabric interconnect and the remote fabric interconnect are the SAN components that 
  are used to connect the local and remote fabrics. Depending on the distance between the two 
  fabrics, they can be single-mode optical fibers that are driven by long wave (LW) gigabit 
  interface converters (GBICs) or Small Form-factor Pluggables (SFPs), or more sophisticated 
  components, such as channel extenders or special SFP modules that are used to extend the 
  distance between SAN components. 
  
  **Local fabric**
  The local fabric is composed of SAN components (switches, cables, and so on) that connect 
  the components (nodes, hosts, and switches) of the local cluster together. 
  
  **Logical unit and logical unit number**
  The logical unit (LU) is defined by the SCSI standards as a LUN. LUN is an abbreviation for 
  an entity that exhibits disk-like behavior, such as a volume or an MDisk. 
  
  **Machine signature**
  A string of characters that identifies a system. A machine signature might be required to 
  obtain a license key. 
  
  **Managed disk**
  An MDisk is a SCSI disk that is presented by a RAID controller and managed by IBM Storwize 
  V7000. The MDisk is not visible to host systems on the SAN. 