This command was reserved but not implemented. It is listed in earlier documentation from Microsoft and third parties; however, no formal definition of the command was ever provided, and the command itself was never implemented. Two related commands--SMB_COM_WRITE_BULK and SMB_COM_WRITE_BULK_DATA--were also never implemented.

Clients SHOULD NOT send requests using this command code. Servers receiving requests with this command code SHOULD<127> return STATUS_NOT_IMPLEMENTED (ERRDOS/ERRbadfunc).