Let B H = {B H (t) : t ∈ R} be a fractional Brownian motion with Hurst parameter H ∈ (0, 1). For the stationary storage processwe provide a tractable criterion for assessing whether, for any positive, non-decreasing function f ,
P(Q B H (t) > f (t) i.o.) equals 0 or 1. Using this criterion we find that, for a family of functions