This document explains the procedure for checking the vSAN on-disk format version using the vSphere Client and ESXi host commands.
VMware vSAN 8.0.x
1. In the vSphere Client, navigate to the vSAN cluster.
2. Click the "Configure" tab.
3. Under the vSAN section, click "Disk Management".
4. After clicking on "View Disks", the Disk Format Version will be displayed in the Disk Group section.
On an ESXi host, the vSAN on-disk format version for each individual device can be referenced from the output of the "localcli vsan storage list" command.
Command:localcli vsan storage list
Excerpt from the Command Output: