  This article assesses Landauer's principle from information theory in the
context of area quantization of the Schwarzschild black hole. Within a
quantum-mechanical perspective where Hawking evaporation can be interpreted in
terms of transitions between the discrete states of the area (or mass)
spectrum, we justify that Landauer's principle holds consistently with the
bound saturating when the number of microstates of the black hole goes as
$2^n$, where $n$ is a large positive integer labeling the levels of the
area/mass spectrum in the semiclassical regime. This is equivalent to the area
spacing $\Delta A = \alpha n l_P^2$ (in natural units), where $\alpha = 4 \ln
2$ for which the entropy spacing between consecutive levels in Boltzmann units
coincides exactly with one bit of information. We also comment on the situation
for other values of $\alpha$ prevalent in the literature.
