If your vSAN cluster becomes unbalanced, you can rebalance the disk use.

If you remove capacity devices from the vSAN cluster and add new capacity devices, the disk groups might become unbalanced. After vSAN health monitoring warns you about any unbalances, you can rebalance your cluster.


Perform the rebalance operation during non-production hours to avoid excessive impact on the cluster.


  1. Navigate to the vSAN cluster in the vSphere Web Client.
  2. Click the Monitor tab and click vSAN.
  3. Click Health.
  4. In the vSAN health service table, select Warning: vSAN Disk Balance.

    You can review the disk balance of the hosts.

  5. Click the Rebalance Disks button to rebalance your cluster.


This operation moves components from the over-utilized disks to the under-utilized disks.