パーティションではなく物理ディスクについて話しているので、DeviceIoControlを見てください。
の合計ディスク サイズの計算を含むそこからの例wmain
:
#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);
}