They where all from that RS -Series i think we had about 15 of them from RS14XX to RS1219 and all of them destroyed their own Raid after around 2 years just lik

They where all from that RS -Series i think we had about 15 of them from RS14XX to RS1219 and all of them destroyed their own Raid after around 2 years just like that, no firmware update before that or other things that could trigger such a crash.