Skip to main content

Decrease reserved capacity

You use the Decrease Capacity option to decrease the reserved capacity for the following storage objects: snapshot group, snapshot volume, and consistency group member volume. You can decrease reserved capacity only by the amount(s) you used to increase it.

Before you begin

  • The storage object must contain more than one reserved capacity volume.

  • The storage object must not be a mirrored pair volume.

  • If the storage object is a snapshot volume, then it must be a disabled snapshot volume.

  • If the storage object is a snapshot group, then it must not contain any associated snapshot images.

About this task

Review the following guidelines:

  • You can remove reserved capacity volumes only in the reverse order that they were added.

  • You cannot decrease the reserved capacity for a snapshot volume that is read-only because it does not have any associated reserved capacity. Only snapshot volumes that are read-write require reserved capacity.

  1. Select Storage > Pools & Volume Groups .
  2. Click the Reserved Capacity tab.
  3. Select the storage object for which you want to decrease reserved capacity, and then click Decrease Capacity .
    The Decrease Reserved Capacity dialog box appears.
  4. Select the capacity amount by which you want to decrease reserved capacity, and then click Decrease .

System Manager performs the following actions:

  • Updates the capacity for the storage object.

  • Displays the newly updated reserved capacity for the storage object.

  • When you decrease capacity for a snapshot volume,

    System Manager automatically transitions the snapshot volume to a Disabled state. Disabled means that the snapshot volume is not currently associated with a snapshot image, and therefore, cannot be assigned to a host for I/O.