In the Ops Manager under the status tab of Elastic Runtime, the persistent disk usage percentage is displaying incorrectly. The jobs are reporting the use of persistent disk even though there are no mounted persistent disks.
This issue can also be seen via the bosh vms --vitals command.
This is because there is an issue with how BOSH calculates persistent disk usage, for jobs that do not have /var/vcap/store directory mounted.
This is a known issue and will be fixed in a future release. This fix will take into account the fact that /var/vcap/store is not mounted and reflect this in the persistent disk usage reported.