I created a test backup to disk job (and an object copy job to copy it to tapes). Then deleted the devices and the media pool. However, that didn' t delete the data from the backend store. I waited for the IDB maintenance to run at 12:30 and that didn't help either.
How does one remove the unwanted stores and its data properly? I did run the following but didn't work:
omnidbutil -purge -sessions 30
onmidbutil -purge -dcbf
omnidbutil -fixmpos
And omnimm -delete_unprotected_media <storename> returned "Library not found" error.