目的：綁定USB 存儲設備（不綁定本地磁盤），實現只讀，讀寫操作。
實驗環境：在NPInstanceSetup中，調試跟蹤：
第一次進入：
入參：
VolumeDeviceType =
VolumeFilesystemType =
通過 FltGetVolumeProperties調用獲取：
FilteSystemDriverName = \FileSystem\MRxSmb\Device\LanmanRedirector （沒用）
FilterSystemDeviceName = \Device\LanmanRedirector\FileSystem\MRxSmb\Device
\LanmanRedirector （沒用）
RealDeviceName = \Device\LanmanRedirector
volProp->DeviceCharacteristics = 0
第二次進入：
入參：
VolumeDeviceType = 8;
VolumeFilesystemType = FLT_FSTYPE_NTFS(2)
通過 FltGetVolumeProperties調用獲取：
FilteSystemDriverName = \FileSystem\Ntfs\Device\HarddiskVolume5
FilterSystemDeviceName = \Ntfs\FileSystem\Ntfs\Device\HarddiskVolume5
RealDeviceName = \Device\HarddiskVolume5
DriverName = \Driver\VolSnap
第三次進入：
VolumeDeviceType = 8;
VolumeFilesystemType = FLT_FSTYPE_NTFS(2)
FilteSystemDriverName = \FileSystem\Ntfs\Device\HarddiskVolume4
FilterSystemDeviceName = \Ntfs\FileSystem\Ntfs\Device\HarddiskVolume4
RealDeviceName = \Device\HarddiskVolume4
pdevObj->Characteristics = 0
DriverName = \Driver\VolSnap
第四次進入：
VolumeDeviceType = 8;
VolumeFilesystemType = FLT_FSTYPE_NTFS(2)
FilteSystemDriverName = \FileSystem\Ntfs\Device\HarddiskVolume2
FilterSystemDeviceName = \Ntfs\FileSystem\Ntfs\Device\HarddiskVolume2
RealDeviceName = \Device\HarddiskVolume2
pdevObj->Characteristics = 0
DriverName = \Driver\VolSnap
第五次進入：
VolumeDeviceType = 8;
VolumeFilesystemType = FLT_FSTYPE_NTFS(2)
FilteSystemDriverName = \FileSystem\Ntfs\Device\HarddiskVolume3
FilterSystemDeviceName = \Ntfs\FileSystem\Ntfs\Device\HarddiskVolume3
RealDeviceName = \Device\HarddiskVolume3
volProp->DeviceCharacteristics = 0
DriverName = \Driver\VolSnap
第六次進入：
VolumeDeviceType = 8;
VolumeFilesystemType = FLT_FSTYPE_NTFS(2)
FilteSystemDriverName = \FileSystem\Ntfs\Device\HarddiskVolume1
FilterSystemDeviceName = \Ntfs\FileSystem\Ntfs\Device\HarddiskVolume1
RealDeviceName = \Device\HarddiskVolume1
pdevObj->Characteristics = 0
DriverName = \Driver\VolSnap
第7次進入：
VolumeDeviceType 8
VolumeFileSystem FLT_FSTYPE_RAW (1)
FilteSystemDriverName = \FileSystem\RAW\Device\Harddisk0\DR0?
FilterSystemDeviceName = \Device\RawDisk\FileSystem\RAW\Device\Harddisk0\DR0?
RealDeviceName = \Device\Harddisk0\DR0?
volProp->DeviceCharacteristics = 100
RealDeviceName = \Device\Harddisk0\DR0?
pdevObj->Characteristics = 100
插入U盤：
FilteSystemDriverName = \FileSystem\Fastfat\Device\Harddisk1\DP(1)0-0+7?
FilterSystemDeviceName = \Fat\FileSystem\Fastfat\Device\Harddisk1\DP(1)0-0+7?
RealDeviceName = \Device\Harddisk1\DP(1)0-0+7?
volProp->DeviceCharacteristics = 101
RealDeviceName = \Device\Harddisk1\DP(1)0-0+7?
pdevObj->Characteristics = 101
插入移動硬盤：
FilteSystemDriverName = \FileSystem\Ntfs\Device\HarddiskVolume6
FilterSystemDeviceName = \Ntfs\FileSystem\Ntfs\Device\HarddiskVolume6
RealDeviceName = \Device\HarddiskVolume6
volProp->DeviceCharacteristics = 0
RealDeviceName = \Device\HarddiskVolume6
pdevObj->Characteristics = 0
DriverName = \Driver\VolSnap
很是鬱悶，感覺這樣也無法區分移動硬盤和本地磁盤，他們的Characteristics都爲0!
感覺還是無法區分移動設備。