Error 0x8004251F

Value: -2147212001 | 0x8004251F | 2147755295

What does it mean ?

VDS_E_MULTIPLE_PACKS  
Specified disks are not all from the same pack.
Value: 9503 | 0x251F | 0b0010010100011111

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

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