vSAN datastore total size is not correct

Products

• VMware vSAN

Issue/Introduction

Symptom:

• vSAN clusters with the same size and number of disks are having different available space.
  
  
  
   

Validation:

• Cluster with larger size has more disks added to the disk group. Select the vSAN cluster > Configure > Disk Management > Select vSAN node > View Disks > Expand the disk group.
  
  vSAN Cluster
  
  
  
  
  vSAN Cluster 2

 

Environment

VMware vSphere vSAN 7.x

VMware vSphere vSAN 8.x

Cause

• Adding the disks physically to the vSAN node, doesn't add the disk to the disk group automatically. Please follow Add Devices to the Disk Group in vSAN Cluster.

Resolution

• Incase there are any critical skyline health alerts like "vSAN cluster configuration consistency" on the vSAN cluster, then please fix them first.
  
  
• If you see partition on the unclaimed disk, then format it first before trying to add it to the vSAN cluster.

Additional Information

vSAN Cluster Configuration Consistency