The following procedure will help you expand the size of a VMFS datastore:
- Log in to the vCenter Server using the vSphere web client and use the key combination Ctrl + Alt + 4 to switch to the storage view.
- Right-click on the desired datastore and click Increase Datastore Capacity...:
- On the Increase Datastore Capacity wizard screen, select the LUN corresponding to the datastore you wish to expand. You will not see the LUN listed, if there is no free space on the LUN:
- On the Specify Configuration screen, you can either choose to use up all the available free space or use the slider to adjust the amount of free space to up:
- On the Ready to Complete screen, verify the settings and click Finish to initiate the expand operation.
- You will see an Expand VMFS datastore complete successfully in the Recent Tasks pane.