text: **Important:**Before unmapping a volume from a host on Storwize V7000, ensure that the 
  host side action is completed on that volume by using the respective host operating system 
  platform commands, such as unmounting the file system, or removing the volume or 
  volume group. Otherwise, it can result in data corruption. 
  
  **Renaming a host**
  To rename a host definition, issue the**chhost -name**command, as shown in Example 8-26. In 
  this example, the host RHEL_HOST is renamed to FC_RHEL_HOST. 
  
  Example 8-26 Renaming a host 
  
  IBM_Storwize:ITSO-V7000:superuser>**chhost -name RHEL-Host-07 RHEL-Host-06**
  IBM_Storwize:ITSO-V7000:superuser> 