NTSTATUS
FstubReadSector(
  IN  PDEVICE_OBJECT DeviceObject,
  IN  ULONG SectorSize,
  IN  ULONG64 SectorNumber,
  OUT PVOID Buffer
  );

Routine Description:

    Read a logical block from the device (disk).

Arguments:

    DeviceObject - The device that we are going to read from.

    SectorSize - The size of the block and the size of the Buffer.

    SectorNumber - The Logical Block Number we are going to read.

    Buffer - The buffer into which we are going to read the block.


Return Values:

    NTSTATUS