如何获取有盘符但是未格式化的磁盘大小(RAW类型的磁盘)

[轻箬笠]

我已经通过GetDiskFreeSpaceEx获取了有盘符且格式化了的磁盘(NTFS类型的磁盘)大小.
现在碰到一个问题,用这个函数获取有盘符但是未格式化的磁盘(RAW类型的磁盘)的大小,返回值为0,即操作失败.
有人知道怎么处理这种情况吗?

[蠓虫带着秤砣飞]

赵老师说了理论，我这里来两个例子吧。 这里有两个例子： http://blog.csdn.net/snz/article/details/1702884 http://blog.163.com/cumt_xl/blog/static/19071504420130133653923/

[赵4老师]

CreateFile The CreateFile function creates or opens the following objects and returns a handle that can be used to access the object: files pipes mailslots communications resources disk devices (Windows NT only) consoles directories (open only) HANDLE CreateFile( LPCTSTR lpFileName, // pointer to name of the file DWORD dwDesiredAccess, // access (read-write) mode DWORD dwShareMode, // share mode LPSECURITY_ATTRIBUTES lpSecurityAttributes, // pointer to security attributes DWORD dwCreationDisposition, // how to create DWORD dwFlagsAndAttributes, // file attributes HANDLE hTemplateFile // handle to file with attributes to // copy ); …… Disk Devices Windows NT: You can use the CreateFile function to open a disk drive or a partition on a disk drive. The function returns a handle to the disk device; that handle can be used with the DeviceIOControl function. The following requirements must be met in order for such a call to succeed: The caller must have administrative privileges for the operation to succeed on a hard disk drive. The lpFileName string should be of the form \\.\PHYSICALDRIVEx to open the hard disk x. Hard disk numbers start at zero. For example: String Meaning \\.\PHYSICALDRIVE2 Obtains a handle to the third physical drive on the user's computer.

[轻箬笠]

@赵4老师 @zjq9931 多谢两位的启发。最后换了个思路，就找到了。在PARTITION_INFORMATION_EX里面有个PartitionLength就可以得到分区总的字节数了，发送IOCTL_DISK_GET_PARTITION_INFO_EX指令就可以了。