  The so-called information-thermodynamics link has been created in a series of
works starting from Maxwell demon and established by the idea of transforming
information into work in the though experiment of Szilard which then evolved
into the vast field of research. The aim of this note is firstly to present two
new models of the Szilard engine containing arbitrary number of molecules which
show irrelevance of acquiring information for work extraction. Secondly, the
difference between the definition of entropy for ergodic systems and systems
with ergodicity breaking constraints is emphasized. The role of nonergodic
systems as information carriers and the thermodynamic cost of stability and
accuracy of information encoding and processing is briefly discussed.
