如何读取位整个磁盘位的内容 [英] How to read the contents of an entire disk bit by bit

问题描述

我有一个闪存卡，我需要计算的驱动器的全部内容的校验。

I've got a flash card that I need to compute a checksum on the entire contents of the drive.

如果我能获得一个流整个驱动器我只是有点看它一下。

If I could acquire a stream to the entire drive I could just read it in bit by bit.

有谁知道是否有这个做什么？

Does anyone know if there is an API for doing this?

我看到的一切到目前为止，要求我打开一个文件。

Everything I see so far requires me to open a file.

有什么办法，只是读取位整个驱动器的内容一点？

Is there any way to just read an entire drive's contents bit by bit?

推荐答案

如果你想编写C＃代码，那么你就必须使用P / Invoke来从磁盘（RAW访问）读取数据。

If you want to write C# code, then you'll have to use P/Invoke to read data from your disk (RAW access).

有什么办法，只是读取位整个驱动器的内容一点？

Is there any way to just read an entire drive's contents bit by bit?

您将不得不作出在驱动器之间的差异（逻辑您的闪存卡的表示，一个安装了一个文件系统，通过指定的驱动器盘符），并在磁盘（物理您的闪存卡的代表性，由磁盘号指定）。

You'll have to make a difference between the drive (logical representation of your flash card, with a FileSystem installed on it, specified by the drive letter) and the disk (physical representation of your flash card, specified by the disk number).

请参阅我以前的答案有关如何读取原始数据驱动器/盘：

See my previous answer about how to read RAW data from a drive/disk:

基本上，你首先需要一个句柄到磁盘​​/驱动器：

Basically, you'll first need a handle to the disk/drive:

// For a DISK:
IntPtr hDisk = CreateFile(string.Format("\\\\.\\PhysicalDrive{0}", diskNumber),
    GenericRead,
    Read | Write,
    0,
    OpenExisting,
    0,
    IntPtr.Zero);

// For a DRIVE
IntPtr hDrive = NativeMethods.CreateFile(
    string.Format("\\\\.\\{0}:", DriveLetter)
    GenericRead,
    Read | Write,
    IntPtr.Zero,
    OpenExisting,
    0,
    IntPtr.Zero);

然后使用 SetFilePointerEx （这样你就可以移动偏移要读），的ReadFile （填入从磁盘/驱动器读取的字节）的缓冲区， CloseHandle的（关闭通过的CreateFile打开手柄）。

Then use SetFilePointerEx (so you can move the offset where you want to read), ReadFile (fills a buffer with bytes read from the disk/drive), CloseHandle (closes the handle opened by CreateFile).

读取块磁盘/驱动器（所以基本上，从偏移量为0的循环，以抵消磁盘/驱动器大小。）

Read the disk/drive by chunks (so basically, a loop from offset "0" to offset "disk/drive size").

什么是重要的（或的ReadFile 总是会失败）：读取块的尺寸必须是你的磁盘（512字节通常情况下）。

What's important (or ReadFile will always fail): the size of read chunks must be a multiple of the sector size of your disk (512 bytes generally).

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