检查软盘驱动器 [英] check floppy Drive

问题描述

要得到我已经使用的 GetDriveType （）函数

To get the removable drives i have used GetDriveType ( ) function

可移动驱动器是否有可能来检查驱动器是否是软盘驱动器或不？

Is it possible to check whether a drive is floppy drive or not ?

请让我知道您对此的建议...

Please let me know your suggestions on this...

谢谢dor任何帮助

推荐答案

内部Microsoft Windows在每个设备上保存这样命名的特性标志（在wdm.h中定义）。如果对应驱动器盘符的设备标志 FILE_FLOPPY_DISKETTE ，则驱动器是一个软盘驱动器：

Internally Microsoft Windows hold so named characteristics flags (defined in wdm.h) for every device. If device which corresponds the drive letter has flag FILE_FLOPPY_DISKETTE, then the drive is a floppy drive:

//
// Define the various device characteristics flags (defined in wdm.h)
//
#define FILE_REMOVABLE_MEDIA                    0x00000001
#define FILE_READ_ONLY_DEVICE                   0x00000002
#define FILE_FLOPPY_DISKETTE                    0x00000004
#define FILE_WRITE_ONCE_MEDIA                   0x00000008
#define FILE_REMOTE_DEVICE                      0x00000010
#define FILE_DEVICE_IS_MOUNTED                  0x00000020
#define FILE_VIRTUAL_VOLUME                     0x00000040
#define FILE_AUTOGENERATED_DEVICE_NAME          0x00000080
#define FILE_DEVICE_SECURE_OPEN                 0x00000100
#define FILE_CHARACTERISTIC_PNP_DEVICE          0x00000800
#define FILE_CHARACTERISTIC_TS_DEVICE           0x00001000
#define FILE_CHARACTERISTIC_WEBDAV_DEVICE       0x00002000

要获取驱动器的特征标志，可以使用不同的API函数。我发现作为一个最有效和简单的方法使用 NtQueryVolumeInformationFile 函数从ntdll.dll。在 http://stackoverflow.com/questions/3098696/how-to-get-the-vid-pid-and-drive-letter-for-all-the-usb-mass-storage-devices -plug / 3100268＃3100268 您会发现此API使用的示例。

To get characteristics flags of a drive you can use different API functions. I find as a most effective and simple way to use NtQueryVolumeInformationFile function from ntdll.dll. Under http://stackoverflow.com/questions/3098696/how-to-get-the-vid-pid-and-drive-letter-for-all-the-usb-mass-storage-devices-plug/3100268#3100268 you will find an example of usage of this API.

更新：您可以使用 NtQueryVolumeInformationFile 功能的情况下直接 IOCTL_STORAGE_GET_DEVICE_NUMBER 和 IOCTL_STORAGE_QUERY_PROPERTY 以前的电话这是所谓的

UPDATE: You can use NtQueryVolumeInformationFile function directly without previous calls of IOCTL_STORAGE_GET_DEVICE_NUMBER and IOCTL_STORAGE_QUERY_PROPERTY which was called in the example for another reasons.

UPDATED 2：按照 GetDriveType 来测试驱动器是否可移动不安全。我有许多可移动的硬件，其中 GetDriveType 显示驱动器作为非可移动，但特征标志有做了 FILE_REMOVABLE_MEDIA 位置。使用 SetupDiGetDeviceRegistryProperty 与 SPDRP_REMOVAL_POLICY 也是安全的。在最后一种情况下，你应该测试 CM_REMOVAL_POLICY_EXPECT_SURPRISE_REMOVAL 或 CM_REMOVAL_POLICY_EXPECT_ORDERLY_REMOVAL 像我一样用这个例子的 http://stackoverflow.com/questions/3098696/how-to-get-the-vid-p-and-drive-letter-for-all-the-usb-mass-storage-devices-plug/3100268#3100268 。

UPDATED 2: By the way the usage of GetDriveType to test if a drive is removeable is not safe. I have many removable hardware where GetDriveType show the drive as non removeable, but characteristics flags has do has FILE_REMOVABLE_MEDIA bit set. Usage of SetupDiGetDeviceRegistryProperty with SPDRP_REMOVAL_POLICY is also safe. In the last case you should test for CM_REMOVAL_POLICY_EXPECT_SURPRISE_REMOVAL or CM_REMOVAL_POLICY_EXPECT_ORDERLY_REMOVAL like I do this in the example http://stackoverflow.com/questions/3098696/how-to-get-the-vid-pid-and-drive-letter-for-all-the-usb-mass-storage-devices-plug/3100268#3100268.

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