# Adding Additional Nodes to the Storage Pool

Use the following steps to add additional nodes to the Storage Pool in the multiples of the Resiliency/Redundancy factor.

## Before You Begin

- Install the latest Maintenance Release version on the CommServe server and MediaAgents in the existing storage pools.

  For more information on the latest Maintenance Release version, see What's New | Feature Release 11.x | Maintenance Releases in Feature Release 11.X | List of Maintenance Releases for Feature Release 11.X.

  For more information on verifying the version information on the CommServe and MediaAgents , see Data Views - Version and Service Pack.

- When you setup the standby DR (Disaster Recovery) CommServe host on the nodes, the nodes must be setup as a new storage pool . The nodes cannot be added as additional nodes to an existing Storage Pool. For more information on configuring a new HyperScale storage pool, see Configuring a Scale-Out Storage Pool.

- Enable root access, if root access is disabled in the storage pool. For more information, see Enabling or Disabling Root Access.

## Procedure

1. Setup the new nodes as a block as described in Setting up a Block.

2. Setup the appliance based on your network topology as described in Setting Up HyperScale 1.5 Appliance.

   Important

   Verify and ensure that all nodes have the same time and timezone settings.

3. Using a web browser, launch the Command Center using the following URL:

   https://<Commserver hostname>/commandcenter

   - Type the user name and password provided during the setup.

   - Click Login.

4. From the navigation, click Storage > Storage Pools.

   The Storage Pool page appears.

5. From the Storage Pools page, click the name of the Storage Pool to which you want to add the additional nodes.

6. Click Add nodes.

   The Add nodes page appears.

7. From the Nodes list, select the number of nodes which you want to add.

   Note

   The number of nodes that you can add to a Storage Pool depends on the Resiliency of the Storage Pool.

8. Click Add.

   This will add the new nodes to the storage pool.

## What To Do Next

- If ransomware protection was enabled on the HyperScale storage pool, then enable ransomware protection on the new nodes that you added.

- Make sure to change the root password, as follows:

  1. Login to the node using the following credentials:

     Username: root

     Password: cvadmin

  2. Type the following command:

         # passwd

  3. Follow on-screen prompts to change the password. (Remember, passwords are case-sensitive.)

- Disable root access, if root access was originally disabled in the storage pool. For more information, see Enabling or Disabling Root Access.

## Additional Notes

In a 3 node setup, the Deduplication Database (DDB) will be distributed as follows before the expansion:

Node 1 | Node 2 | Node 3
--- | --- | ---
Partition 1 Partition 2 | Partition 3 Partition 4 | Partition 5 Partition 6

When the storage pool is expanded to 6 control nodes, the DDB will be automatically re-distributed across the MediaAgents as follows:

Note

As a result, jobs accessing the DDB will be automatically suspended during the process and (automatically) resumed once the DDB partitions are successfully re-distributed across all the partitions. (If there is no data in the DDB (no backups), then a 'configuration-only' move will be initiated.)

Node 1 | Node 2 | Node 3 | Node 4 | Node 5 | Node 6
--- | --- | --- | --- | --- | ---
Partition 1 | Partition 3 | Partition 5 | Partition 2 | Partition 4 | Partition 6

DDB partitions will be moved to the new node(s) when they are configured as a Control node until all the Control nodes contain only one partition in each node.

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