Shrinking or expanding space-efficient VDisks

You can use the SAN Volume Controller Console to increase or decrease the real capacity of a space-efficient virtual disk (VDisk).

1. Click Work with Virtual Disks > Virtual Disks in the portfolio. The Viewing Virtual Disks panel is displayed.
2. Select the VDisk and select Expand/Shrink Space-efficient VDisk from the task list. Click Go. The Shrink/Expand Space-Efficient Disks panel is displayed.
3. Choose which copies of the VDisk that you want to shrink or expand.
4. Enter the amount to either decrease or increase the real capacity of the selected space-efficient VDisk in the Amount to shrink/expand field.
   Note: You cannot shrink the real capacity of a space-efficient VDisk below its used capacity. Further shrinking is restricted to prevent data loss.
5. Select the Shrink or Expand option and then click OK.
6. If you are expanding a striped space-efficient VDisk, you can select an MDisk candidate to be used to allocate new extents to the space-efficient VDisk.

   If you are working with VDisk copies, perform the following steps:

   1. Select the MDisk to use to allocate new extents to the space-efficient VDisk.
   2. Select MDisk for each copy.
   3. Click Add to add the selected MDisk to the Managed Disks Striped in This Order list.
   4. After you have added all the MDisks to use to expand the capacity of the VDisk, you can use the arrows to determine the order in which they are used.