Is not possible to remove a single mapping for a Volume if it have been mapped to all SDCs.
Not sure if this should be considered a bug or by design in SIO.
workaround:
- Get list of all SDCs
- Remove the SDC you want to unmap from the list
- Map volume to list of SDCs
- Change map_to_all_sdc parameter for volume to False
Not sure if this fixes the problem. Might cause a glitch for IO during unmap/remap. Need to test before implement