Registry keys accessed under the storahci (Storport ahci) service/driver path The following is a list of keys that are either read or used by storahci (Storport ahci) service/driver upon being initialized. \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : UncachedExtAlignment \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : TreatAsInternalPort \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : TestFlags \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : SupportFirmwareUpgrade \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : SingleIO \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : ResetInInit \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : ReportSataBusTypeAsAta \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : PRDTSplit \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : PortStartTimeout \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NumberOfRequests \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NoNcqEnhancedErrorRecovery \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NoLPM \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NoIdleD3 \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NoFUACommand \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NoD3Cold \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NeverNonQueuedErrorRecovery \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NeedSetTransferModeCommand \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : NcqDisabled \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : MinPowerCyclePeriodInSecs \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : MinimumUCXAddress \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : MaxLbaRangeCountForChangeLba \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : MaxIoTransferSize \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : MaximumUCXAddress \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : MaximumLogicalUnit \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : LogFlags \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : LinkTimeout \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : IrIdleTimeoutInMS \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : IgnoreHotPlug \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : HwDeviceSleepIdleTimeoutInMS \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : ForceGenxSpeed \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : ForceClearReservedSlotInUseFlag \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : FastFailIOForStuckDevice \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : ExpectedMsiMessageCount \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : EtwThrottleInterval \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : EtwEventsPerInterval \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : EnableFuaSupport \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : EnableDEVSLP \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : EnableCLOReset \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DSMDataSizeCapInBlocks \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DriverParameter \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DmaFull64BitNoBoundaryReqSupport \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DisableTrim \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DisableHybrid \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DeviceSleepMode \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DeviceSleepIdleTimeoutInMS \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DeviceResetToleranceCountForFastFailIO \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DeviceLowestPowerIdleTimeoutInMs \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DETDetectionTimeForRecovery \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : DETDetectionTime \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : D3ColdInLowestSystemPower \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS\Device : AllowDeviceHybridInfo \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS : IoTimeoutValue \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS : IoLatencyCap \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS : DmaRemappingCompatible \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS : BusyRetryCount \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS : BusyPauseTimeInMs \Registry\Machine\SYSTEM\ControlSet001\Services\storahci\PARAMETERS : BusType