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

If you remove capacity devices from the Virtual SAN cluster and add new capacity devices, the Virtual SAN cluster might become unbalanced from a capacity utilization perspective. After Virtual SAN 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 Virtual SAN 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: Virtual SAN 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.