Error 0x800423FF

Value: -2147212289 | 0x800423FF | 2147755007

What does it mean ?

VSS_E_RESYNC_IN_PROGRESS  
The LUN resynchronization operation could not be started because another resynchronization operation is already in progress.
Value: 9215 | 0x23FF | 0b0010001111111111

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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