What the REST API call for discover unmananged volumes ? VIPR 3.5

  I am trying to figure out whats the REST API call for performing the catalog action "Discover Unmanaged Volumes".

I found this in the REST API guide : POST /vdc/storage-systems/discover

but it doesn't seem to be updating unmanaged volumes information on VIPR controller. It just performs a quick discover that lasts about 2 minutes per VMAX.

I've tried to test above API call and tried to ingest volumes. But the unmanaged volumes are not getting updated. However when i use catalog item "Discover Unmanaged Volumes", i was able to perform ingest successfully.

I'm on VIPR controller version 3.5

Following document doesn't have API method to perform this task.

https://support.emc.com/docu79620_ViPR-Controller-3.5-Ingest-Services-for-Existing-Environments.pdf?language=en_US

Appreciate your help.