获取操作系统所在的物理磁盘号

来源：互联网发布：软件标准规范建设内容编辑：程序博客网时间：2024/05/18 02:50

转载自：http://hi.baidu.com/shenli1979/blog/item/ea491b30de6a909ea9018ea3.html

由于程序需要，查了下如何判断操作系统所在的PhysicalDrive，把这段代码贴这里做个备忘。

获取系统盘的逻辑驱动器号的函数
GetSystemDirectory;

根据逻辑驱动器号查找物理驱动器号的方法如下

相关的宏定义
typedef struct _DISK_EXTENT
{
    DWORD DiskNumber;
    LARGE_INTEGER StartingOffset;
    LARGE_INTEGER ExtentLength;
} DISK_EXTENT, *PDISK_EXTENT;

typedef struct _VOLUME_DISK_EXTENTS
{
    DWORD NumberOfDiskExtents;
    DISK_EXTENT Extents[1];
} VOLUME_DISK_EXTENTS, *PVOLUME_DISK_EXTENTS;

#define IOCTL_VOLUME_BASE ((DWORD) 'V')
#define IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS CTL_CODE(IOCTL_VOLUME_BASE, 0, METHOD_BUFFERED, FILE_ANY_ACCESS)

函数
HANDLE hFile =
    CreateFile("////.//C:",
    GENERIC_READ,
    FILE_SHARE_READ|FILE_SHARE_WRITE,
    NULL,
    OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,
    NULL);
    VOLUME_DISK_EXTENTS vde;
DWORD readed;
BOOL ret =
    DeviceIoControl(hFile,
    IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS,
    NULL,0,
    &vde,
    sizeof(VOLUME_DISK_EXTENTS),&readed,NULL);
CloseHandle(hFile);