PVS-Studio warning V666 for Geant4

bool G4GMocrenIO::storeData2() {
  ....
  // file identifier
  ofile.write("GRAPE    ", 8);
  ....
}

This suspicious code was found in Geant4 project by PVS-Studio static code analyzer.
Warning message is:
V666 Consider inspecting second argument of the function 'write'. It is possible that the value does not correspond with the length of a string which was passed with the first argument. _G4GMocren-archive g4gmocrenio.cc 1351

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