text: **Unmapping:**If you click**Unmap**, all access for this host to volumes that are controlled 
  by the Storwize V7000 system is removed. Ensure that you run the required procedures 
  on your host operating system, such as unmounting the file system, taking the disk 
  offline, or disabling the volume group, before removing the volume mappings from your 
  host object on Storwize V7000 GUI. 
  
  3. The changes are applied to the system. Click**Close**. Figure 8-34 shows that the selected 
  host no longer has any host mappings. 