Adding disks to a node

You add disks to a node to increase the number of hot spares, to add space to an aggregate, or to replace disks.

Before you begin

You must have confirmed that your platform model supports the type of disk you want to add.


  1. Check the NetApp Support Site for newer disk and shelf firmware and Disk Qualification Package files.
    If your node does not have the latest versions, you must update them before installing the new disk.
  2. Install the disks according to the hardware guide for your disk shelf or the hardware and service guide for your platform.

    The new disks are not recognized until they are assigned to a node and pool. You can assign the new disks manually, or you can wait for ONTAP to automatically assign the new disks if your node follows the rules for disk autoassignment.

  3. After the new disks have all been recognized, verify their addition and their ownership information: storage aggregate show-spare-disks
    You should see the new disks, owned by the correct node and in the correct pool.
  4. Optional: Zero the newly added disks: storage disk zerospares
    Disks that have been used previously in an ONTAP aggregate must be zeroed before they can be added to another aggregate. Zeroing the disks now can prevent delays in case you need to quickly increase the size of an aggregate. The disk zeroing command runs in the background and can take hours to complete, depending on the size of the non-zeroed disks in the node.


The new disks are ready to be added to an aggregate, used to replace an existing disk, or placed onto the list of hot spares.