目的：绑定USB 存储设备（不绑定本地磁盘），实现只读，读写操作。
实验环境：在NPInstanceSetup中，调试跟踪：
第一次进入：
入参：
VolumeDeviceType =
VolumeFilesystemType =
通过 FltGetVolumeProperties调用获取：
FilteSystemDriverName = \FileSystem\MRxSmb\Device\LanmanRedirector （没用）
FilterSystemDeviceName = \Device\LanmanRedirector\FileSystem\MRxSmb\Device
\LanmanRedirector （没用）
RealDeviceName = \Device\LanmanRedirector
volProp->DeviceCharacteristics = 0
第二次进入：
入参：
VolumeDeviceType = 8;
VolumeFilesystemType = FLT_FSTYPE_NTFS(2)
通过 FltGetVolumeProperties调用获取：
FilteSystemDriverName = \FileSystem\Ntfs\Device\HarddiskVolume5
FilterSystemDeviceName = \Ntfs\FileSystem\Ntfs\Device\HarddiskVolume5
RealDeviceName = \Device\HarddiskVolume5
DriverName = \Driver\VolSnap
第三次进入：
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
第四次进入：
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
第五次进入：
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
第六次进入：
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次进入：
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盘：
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
插入移动硬盘：
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
很是郁闷，感觉这样也无法区分移动硬盘和本地磁盘，他们的Characteristics都为0!
感觉还是无法区分移动设备。