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SANtricity 11.7
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Increase reserved capacity


You can increase reserved capacity, which is the physically allocated capacity used for any copy service operation on a storage object.

For snapshot operations, it is typically 40 percent of the base volume; for asynchronous mirroring operations, it is typically 20 percent of the base volume. Typically, you increase reserved capacity when you receive a warning that the storage object's reserved capacity is becoming full.

Before you begin
  • The volume in the pool or volume group must have an Optimal status and must not be in any state of modification.

  • Free capacity must exist in the pool or volume group that you want to use to increase capacity.

    If no free capacity exists on any pool or volume group, you can add unassigned capacity in the form of unused drives to a pool or volume group.

About this task

You can increase reserved capacity only in increments of 8 GiB for the following storage objects:

  • Snapshot group

  • Snapshot volume

  • Consistency group member volume

  • Mirrored pair volume

Use a high percentage if you believe the primary volume will undergo many changes or if the lifespan of a particular copy service operation will be very long.


You cannot increase reserved capacity for a snapshot volume that is read-only. Only snapshot volumes that are read-write require reserved capacity.

  1. Select Storage  Pools & Volume Groups.

  2. Select the Reserved Capacity tab.

  3. Select the storage object for which you want to increase reserved capacity, and then click Increase Capacity.

    The Increase Reserved Capacity dialog box appears.

  4. Use the spinner box to adjust the capacity percentage.

    If free capacity does not exist on the pool or volume group that contains the storage object you selected, and the storage array has Unassigned Capacity, you can create a new pool or volume group. You can then retry this operation using the new free capacity on that pool or volume group.

  5. Click Increase.


System Manager performs the following actions:

  • Increases the reserved capacity for the storage object.

  • Displays the newly-added reserved capacity.