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QTS 5.0.x

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Resizing a Thick or Thin Volume

The maximum capacity of thick and thin volumes can be increased or decreased.



Expand Volume

  • The operation can be performed while the volume is online and accessible to users.

  • For a thick volume, additional space is allocated from the volume's parent storage pool.

Shrink Volume

  • Users and applications will be unable to access the volume until the operation is finished.

  • For a thick volume, the freed space is returned to the volume's parent storage pool.

Volume Type

Maximum Allowed Capacity


Amount of free space in the parent storage pool.


Twenty times the amount of free space in the parent storage pool.


Setting the maximum size of a thin volume to a value that is greater than the amount of free space in the storage pool is called over-allocation.

  1. Go to Storage & Snapshots > Storage > Storage/Snapshots.
  2. Select a thick or thin volume.
  3. Click Manage.

    The Volume Management window opens.

  4. Select Action > Resize Volume.

    The Volume Resizing Wizard opens.

  5. Specify a new capacity for the volume.

    Capacity can be specified in megabytes (MB), gigabytes (GB) or terabytes (TB).

  6. Optional: Click Set to Max.

    Sets the new volume capacity to the maximum available size. This option is only available for thick volumes.

  7. Click Apply.

    If you are shrinking the volume, a confirmation message appears.

  8. Click OK.

    The Volume Resizing Wizard closes. The volume status changes to Expanding... or Shrinking....

After expansion is complete, the volume status changes back to Ready.