Important:  For volumes that contain more than one copy, you might receive a  CMMVC6354E error. Check the Running tasks window and wait for the copy to  synchronize. If you want the synchronization process to complete more quickly, increase  the rate by increasing the Mirror Sync Rate value in the Actions menu. When the copy is  synchronized, resubmit the shrink process. Similar errors might occur if other tasks (for example, volume expand or format operations)  are running on the volume. The solution is to wait until these operations finish, then restart  the shrink process. The IBM Storwize V5000 can expand volumes. Use this feature only if the host OS supports  it. This capability increases the capacity that is allocated to the particular volume by the  amount that is specified. To expand a volume, complete the following steps: 8.3.7 Expanding a volume 1. Select  Expand  from the Actions menu.  2. Enter the new volume size or enter the amount by which the volume needs to expand.  3. Click  Expand , as shown in Figure 8-42. Figure 8-42 Expand Volume window 4. If the task completion window remains open, review the results of the operation and click  Close  to return to the Volumes window. 5. Run the required procedures on the host operating system to use the full available space. Chapter 8. Advanced host and volume administration  413