blck = param.BlockDeviceQueue{BlockDeviceSchedulers: param.BlockDeviceSchedulers{SchedulerChoice: make(map[string]string)}, BlockDeviceNrRequests: param.BlockDeviceNrRequests{NrRequests: make(map[string]int)}, BlockDeviceReadAheadKB: param.BlockDeviceReadAheadKB{ReadAheadKB: make(map[string]int)}, BlockDeviceMaxSectorsKB: param.BlockDeviceMaxSectorsKB{MaxSectorsKB: make(map[string]int)}}