Upgrading the vSAN On-Disk Format

After upgrading the vSphere environment to a newer version, upgrade the vSAN on-disk format. The latest on-disk format provides the complete feature set of vSAN.

Depending on the size of disk groups, the disk format upgrade can be time-consuming because the disk groups are upgraded one at a time. For each disk group upgrade, all data from each device is evacuated and the disk group is removed from the vSAN cluster. The disk group is then added back to vSAN with the new on-disk format. For more details, see Administering VMware vSAN at http://docs.vmware.com.