Error 0x80830006

Value: -2138898426 | 0x80830006 | 2156068870

What does it mean ?

ERROR_TIERING_ALREADY_PROCESSING  
The Storage Tiers Management service is already optimizing the storage tiers on the specified volume.
Value: 6 | 0x0006 | 0b0000000000000110

Where does it come from ?

FACILITY_TIERING  
Storage Tiers Management
Value: 131 | 0x083 | 0b10000011

StackOverflow

Other Errors for FACILITY_TIERING