text: **Mirrored volume**
  A mirrored volume is a single virtual volume that has two physical volume copies. The primary 
  physical copy is known within the IBM Storwize V7000 as copy 0 and the secondary copy is 
  known within the IBM Storwize V7000 as copy 1. 
  
  **Node canister**
  A node canister is a hardware unit that includes the node hardware, fabric and service 
  interfaces, and serial-attached SCSI (SAS) expansion ports. Node canisters are specifically 
  recognized on IBM Storwize products. In SVC, all these components are spread within the 
  whole system chassis, so we usually do not consider node canisters in SVC, but just the node 
  as a whole. 
  
  **Node rescue**
  The process by which a node with no valid software is installed on its hard disk drive can copy 
  software from another node connected to the same Fibre Channel fabric. 
  
  **NPIV**
  N_Port ID Virtualization (NPIV) is a Fibre Channel feature whereby multiple Fibre Channel 
  node port (N_Port) IDs can share a single physical N_Port. 
  
  **Object Storage**
  Object Storage is a general term that refers to the entity in which Cloud Object Storage 
  organizes, manages, and stores with units of storage or just*objects*. 