我正在尝试获取物理驱动器的总大小(未分配 + 主分区 + 扩展分区大小)。
我的磁盘名称为 \\.\PhysicalDriveX
我尝试使用 GetDiskFreeSpaceEx
但是当分区是扩展分区时它没有给出正确的结果,在这种情况下它返回分区的总大小。
BOOL ret = FALSE;
ULARGE_INTEGER ulFreeSpace;
ULARGE_INTEGER ulTotalSpace;
ULARGE_INTEGER ulTotalFreeSpace;
__int64 ulTotalUsedSpace = 0;
GetDiskFreeSpaceEx(szBuffer, &ulFreeSpace, &ulTotalSpace, &ulTotalFreeSpace);
*diskSize = ulTotalSpace.QuadPart;
我可以使用 DeviceIoControl 使用 IOCTL_DISK_GET_DRIVE_LAYOUT_EX 获取分区信息 但我对扩展分区大小感到困惑。
有没有一种方法可以在 Windows 上使用 C++ 准确获取硬盘的总大小??
最佳答案
由于您谈论的是物理磁盘而不是分区,请查看 DeviceIoControl .
那里的示例,其中包括计算 wmain
中的总磁盘大小:
#include <windows.h>
#include <winioctl.h>
#include <stdio.h>
BOOL GetDriveGeometry(LPWSTR wszPath, DISK_GEOMETRY *pdg)
{
HANDLE hDevice = INVALID_HANDLE_VALUE; // handle to the drive to be examined
BOOL bResult = FALSE; // results flag
DWORD junk = 0; // discard results
hDevice = CreateFileW(wszPath, // drive to open
0, // no access to the drive
FILE_SHARE_READ | // share mode
FILE_SHARE_WRITE,
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // do not copy file attributes
if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
{
return (FALSE);
}
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer
pdg, sizeof(*pdg), // output buffer
&junk, // # bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O
CloseHandle(hDevice);
return (bResult);
}
int wmain(int argc, wchar_t *argv[])
{
DISK_GEOMETRY pdg = { 0 }; // disk drive geometry structure
BOOL bResult = FALSE; // generic results flag
ULONGLONG DiskSize = 0; // size of the drive, in bytes
bResult = GetDriveGeometry (wszDrive, &pdg);
if (bResult)
{
wprintf(L"Drive path = %ws\n", wszDrive);
wprintf(L"Cylinders = %I64d\n", pdg.Cylinders);
wprintf(L"Tracks/cylinder = %ld\n", (ULONG) pdg.TracksPerCylinder);
wprintf(L"Sectors/track = %ld\n", (ULONG) pdg.SectorsPerTrack);
wprintf(L"Bytes/sector = %ld\n", (ULONG) pdg.BytesPerSector);
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
wprintf(L"Disk size = %I64d (Bytes)\n"
L" = %.2f (Gb)\n",
DiskSize, (double) DiskSize / (1024 * 1024 * 1024));
}
else
{
wprintf (L"GetDriveGeometry failed. Error %ld.\n", GetLastError ());
}
return ((int)bResult);
}
关于c++ - 在 C++ Windows 中获取硬盘的总大小,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15384916/