Removes the boot signature from the master boot record, so that the disk will be formatted from sector zero to the end of the disk. Partition information is no longer stored in sector zero.

To perform this operation, call the DeviceIoControl function with the following parameters.

BOOL DeviceIoControl(
  (HANDLE) hDevice,               // handle to device
  IOCTL_DISK_DELETE_DRIVE_LAYOUT, // dwIoControlCodeNULL,                           // lpInBuffer0,                              // nInBufferSizeNULL,                           // lpOutBuffer0,                              // nOutBufferSize(LPDWORD) lpBytesReturned,      // number of bytes returned
  (LPOVERLAPPED) lpOverlapped     // OVERLAPPED structure

Major Code


Input Buffer

Input Buffer Length

Output Buffer

Output Buffer Length

Input / Output Buffer

Input / Output Buffer Length

Status Block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful.

Otherwise, Status to the appropriate error condition as a NTSTATUS code.

For more information, see NTSTATUS Values.


Windows version Windows XP [desktop apps only] Windows Server 2003 [desktop apps only]
Header winioctl.h (include Windows.h)

See Also


Disk Management Control Codes