如何将文件写入物理驱动器（Windows 7）而不会收到ERROR_ACCESS_DENIED？ [英] How to WriteFile to a PhysicalDrive (Windows 7) without getting ERROR_ACCESS_DENIED?

问题描述

我试图写一个测试模式到格式化的USB驱动器的每个扇区。有一个逻辑驱动器（例如h :)。该卷是FAT格式的，包含要覆盖的数据。另外，我想覆盖整个物理驱动器。该程序正在运行与提升的用户权限。

首先，我做了以下工作：

  //从驱动器字母h：我使用
获取物理磁盘号// IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS => \\.\PhysicalDrive2
 
 hDevice = :: CreateFile（\\.\PhysicalDrive2，GENERIC_READ | GENERIC_WRITE，
 FILE_SHARE_READ | FILE_SHARE_WRITE，NULL，OPEN_EXISTING ，0，NULL）; 
 
 //通过IOCTL_DISK_GET_DRIVE_GEOMETRY_EX 
获取可用扇区的数量// => ulNumberOfSectors 
 
 //现在我尝试写一些扇区，例如2（我想使用更高的值）：
 WriteFile（hDevice，abBuffer，2 * 512，& byteswritten，NULL）; 
  

对 WriteFile 的调用失败， c $ c $ ERROR_ACCESS_DENIED 。

如果我写了一个扇区，它就可以工作。

<当我覆盖第一个扇区并重新插入设备时，Windows想格式化它。在这种情况下，我的代码可以同时运行2048个扇区而不会出现 ERROR_ACCESS_DENIED 。

我也卸载了 CodeProject：WriteFile on物理驱动器与Windows 7 ，但这并没有改变任何东西。很明显，卷被卸载，因为它在Windows资源管理器中不再可见。

由于性能原因，我想要写多个单个扇区。我也担心这个领域的其他问题可能会发生，因为我没有完全理解这个问题。

有什么建议？

解决方案

不同的 WriteFile（）大小，但是我确实解决了
$ b

WriteFile Access is denied < ERROR_ACCESS_DENIED / 5> to
'\.\physicaldriveX

$ b

计算机管理 - >磁盘管理：

设备（通常为USB HDD / SSD）
$ b

• 成交量（H：在您的情况下） - >右键单击 - >删除成交量


• 磁盘（在你的案例中的磁盘2） - >右键单击 - >脱机


• 磁盘（在你的案例中的磁盘2） - >右键单击 - >在线
>

之后，我可以写入'\.\physicaldriveX'，没有任何问题。

我认为只要有任何文件系统，Win7就会锁定（与以前的Windows版本不同）物理设备e设备，以避免一致性问题。

I'm trying to write a test pattern to every sector of a formatted USB drive. There is one logical drive (e.g. h:). This volume is FAT-formatted and contains data to be overwritten. Also, I want to overwrite the whole physical drive. The program is running with elevated user rights.

First I did the following:

// from the drive letter "h:" I get the physical disk number using
// IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS => "\\.\PhysicalDrive2"

hDevice = ::CreateFile( "\\.\PhysicalDrive2", GENERIC_READ|GENERIC_WRITE, 
  FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL ); 

// get the number of available sectors with IOCTL_DISK_GET_DRIVE_GEOMETRY_EX
// => ulNumberOfSectors

// now I try to write some sectors, e.g. 2 (I want to use a higher value):
WriteFile( hDevice, abBuffer, 2*512, &byteswritten, NULL );

The call to WriteFile fails with ERROR_ACCESS_DENIED.

If I write one sector, it works.

When I overwrite the first sector and plug the device out and in again, Windows wants to format it. In this situation my code with 2048 sectors at once works without ERROR_ACCESS_DENIED.

I also unmounted the volume as described in CodeProject: WriteFile on Physical Drives with Windows 7 but this didn't change anything. Obviously the volume is unmounted because it's no longer visible in Windows Explorer.

I want to write more than a single sector due to perfomance reasons. I'm also afraid that other problems in the field might occur because I don't fully understand ths problem.

Any suggestions?

解决方案

I didn't have problems with different WriteFile() sizes, but I did solve the

WriteFile(): Access is denied <ERROR_ACCESS_DENIED/5> to '\.\physicaldriveX

devices (usually USB HDD/SSD) in Windows 7 running as Administrator (elevated rights) as follows:

Computer Management -> Disk Management:

• Volume (H: in your case) -> right-click -> Delete Volume
• Disk (Disk 2 in your case) -> right-click -> Off-line
• Disk (Disk 2 in your case) -> right-click -> On-line

After that, I'm able to write to '\.\physicaldriveX' with no problem.

I think the Win7 locks (unlike previous Windows releases) the physical device as long as there is any file system on the device to avoid consistency problems.

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