根据 GetLastError 直接写入磁盘会导致错误代码 5

我正在尝试在Windows中直接写入USB磁盘。我使用CreateFile函数创建磁盘句柄，并使用WriteFile函数尝试写入文件。WriteFile 函数失败，状态代码为 5(根据 GetLastError(。我尝试使用FSCTL_DISMOUNT_VOLUME锁定磁盘卷，但卷被隐藏，因此我无法获取其卷号。

法典：

u8 Disk::Init()
{
char fn[24] = { 0 };
sprintf(fn, "\\.\PhysicalDrive%d", (int)m_nDiskNum);
m_hDisk = CreateFileA(fn, GENERIC_WRITE | GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
OPEN_EXISTING,
FILE_FLAG_WRITE_THROUGH | FILE_FLAG_NO_BUFFERING, 0);
if (INVALID_HANDLE_VALUE == m_hDisk)
{
return (FAIL);
}
//m_DiskInfo.Init();
return Lock();
}
u8 Disk::Lock()
{
STORAGE_DEVICE_NUMBER d1;
DWORD nr;
char dn[8], c;
if (!DeviceIoControl((HANDLE)m_hDisk, IOCTL_STORAGE_GET_DEVICE_NUMBER,
NULL, 0, &d1, sizeof(d1), &nr, 0))
{
return (FAIL);
}
strcpy(dn, "\\.\A:");
// some volume is hided, so I cannot get its letter
for (c = 'C'; c < 'Z'; c++)
{
HANDLE hd;
STORAGE_DEVICE_NUMBER d2;
dn[4] = c;
hd = CreateFileA(dn, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, 0);
if (hd == INVALID_HANDLE_VALUE)
{
continue;
}
if ((!DeviceIoControl(hd, IOCTL_STORAGE_GET_DEVICE_NUMBER,
NULL, 0, &d2, sizeof(d2), &nr, 0)) ||
(d1.DeviceType != d2.DeviceType) ||
(d1.DeviceNumber != d2.DeviceNumber))
{
CloseHandle(hd);
continue;
}
if (!DeviceIoControl(hd, FSCTL_DISMOUNT_VOLUME, NULL, 0, NULL, 0,
&nr, 0))
{
CloseHandle(hd);
return (FAIL);
}
m_LockedVolums.push_back(hd);
}
return (SUCC);
}
u8 Disk::UnLock()
{
for (auto it : m_LockedVolums)
{
CloseHandle(it);
}
m_LockedVolums.clear();
return (SUCC);
}
u8 Disk::WriteSector(_Out_opt_ u8 * cBuf, int nStartSec, int nSecCont/* = 1*/)
{
if (Seek(nStartSec))
{
return(FAIL);
}
unsigned long nWrited;
if ((!WriteFile((HANDLE)m_hDisk, cBuf, nSecCont * m_nBytePerSec, &nWrited, NULL))
|| (nSecCont * m_nBytePerSec != (int)nWrited))
{
return(FAIL);
}
return(SUCC);
}