Pompey eased past Barnsley to reach the fifth round of the Emirates FA Cup.
They won 4-2 against their Championship opponents at Fratton Park, ensuring that Kenny Jackett's side remain fighting on three fronts.
Ben Close and John Marquis both struck before the break to give the hosts a comfortable lead at the inerval.
Cauley Woodrow responded, but Ronan Curtis and Christian Burgess wrapped the win up before Conor Chaplin netted a late Tykes consolation.