Originally Posted by sebaska
In case of unreliable airspeed many protections remain as for a last valid speed.
Except for the RTLU, that is new information and it would be helpful if you could elaborate on that.
According to BEA's Interim Report #3 p.27 (English version):
The calibrated airspeed recorded in the FDR is that displayed on the left-hand PFD, unless it is invalid (if the speed is less than 30 kt, in which case the SPD flag replaces the speed scale).
The recorded airspeeds remained above 30 kt until at least 02:11:45.
Perhaps it one should distinguish "invalid" from "erroneous". At least one airspeed value became erroneous at 02:10:04.6. The ECAM message NAV ADR DISAGREE was generated after 02:12:00, so until that time at least two of the three airspeed values must have been within tolerance of each other, erroneous or not, but still 'valid' until 02:11:45.