I do have backup solution which uses Oracle VSS Writer on 11g successfully.
However, in 12c, vssadmin list writers does not enumerate Oracle VSS Writer. I followed protocol to install and start Oracle VSS Service using oravssw [SID] /i and oravssw /q /start and service is started and running. However Oracle writer is not listed by Volume Shadow Services.
Is there something new regarding this feature in 12c?