IOCTL_DISK_FLUSH_CACHE (Compact 2013)
3/26/2014
This I/O control message is issued by the FAT file system when a storage device has an associated hardware cache, and the device driver reports that the cache needs to be flushed for transfers. Send this message with DeviceIoControl.
Syntax
BOOL DeviceIoControl(
HANDLE hDevice, // handle to device
DWORD dwIoControlCode, // use IOCTL_DISK_FLUSH_CACHE
LPVOID lpInBuffer, // pointer to input buffer
DWORD nInBufferSize, // input buffer size
LPVOID lpOutBuffer, // pointer to output buffer
DWORD nOutBufferSize, // output buffer size
LPDWORD lpBytesReturned, // number of bytes returned
OVERLAPPED lpOverlapped // pointer to OVERLAPPED structure
);
Parameters
- hDevice
[in] Handle to the device. You can obtain this by opening the FAT volume by its file system entry.
- dwIoControlCode
[in] Control code for the operation. Use IOCTL_DISK_FLUSH_CACHE for this operation.
- lpInBuffer
Not used.
- nInBufferSize
Not used.
- lpOutBuffer
Not used.
- nOutBufferSize
Not used.
- lpBytesReturned
Not used.
- lpOverlapped
Not used.
Return Values
Returns TRUE if successful; otherwise, returns FALSE.
Remarks
To get extended error information, call GetLastError. GetLastError may return other standard error messages as appropriate.
Remarks
This IOCTL is used only to flush a hardware cache.
You do not need to store the manufacturer identifier string and disk serial number. For ATA disk devices, the manufacturer identifier string and disk serial number read directly from the storage card.
Requirements
Header |
diskio.h |