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Creating LUNs

You can use System Manager to create LUNs for an existing aggregate, volume, or qtree when there is available free space. You can create a LUN in an existing volume or create a new FlexVol volume for the LUN. You can also enable Storage Quality of Service (QoS) to manage the workload performance.

About this task

If you specify the LUN ID, System Manager checks the validity of the LUN ID before adding it. If you do not specify a LUN ID, Data ONTAP automatically assigns one.

While selecting the LUN multiprotocol type, you should have considered the guidelines for using each type.

In a MetroCluster configuration, System Manager displays only the following aggregates for creating FlexVol volumes for the LUN:


  1. Expand the Storage Virtual Machines hierarchy in the left navigation pane.
  2. In the navigation pane, select the Storage Virtual Machine (SVM), and then click Storage > LUNs.
  3. In the LUN Management tab, click Create.
  4. In the Create LUN Wizard, specify the name, size, type, and description for the LUN, disable space reservation if required, and then click Next.
  5. Create a new FlexVol volume for the LUN or select an existing volume or qtree, and then click Next.
  6. Add initiator groups if you want to control host access to the LUN, and then click Next.
  7. Select the Manage Storage Quality of Service check box if you want to manage the workload performance of the LUN.
  8. Create a new storage QoS policy group or select an existing policy group to control the input/output (I/O) performance of the LUN:
    If you want to... Then do the following...
    Create a new policy group
    1. Specify the policy group name.
    2. Specify the maximum throughput limit to ensure that the workload of the objects in the policy group do not exceed the specified throughput limit.

      If you do not specify the maximum throughput limit, the value is set to unlimited and the unit that you specify does not affect the maximum throughput.

    3. Click Next.
    Select an existing policy group
    1. Select Existing Policy Group, and then click Choose to select an existing policy group from the Select Policy Group dialog box.

      You can also choose to modify the maximum throughput for the selected policy group.

    2. Click Next.

    If the policy group is assigned to more than one object, the maximum throughput that you specify is shared among the objects.

  9. Review the specified details in the LUN summary window, and then click Next.
  10. Confirm the details and click Finish to complete the wizard.