After you finish upgrading the disk format, you must verify whether the vSAN cluster is using the new on-disk format.
- Navigate to the vSAN cluster in the vSphere Web Client.
- Click the Configure tab.
- Under vSAN, click Disk Management.
The current disk format version appears in the Disk Format Version column. For example, if you are using disk format 2.0, it appears as version 2 in the Disk Format Version column. For on-disk format 3.0, the disk format version appears as version 3.