The reboots are still there. Sometimes the system is up for less then a minute, sometimes for more than 2 days. I now disconnected the SATA drives, so that means some stuff (e.g. my gallery) on the server is not available since that resides on the SATA drive. If the system stays up now, it means the extra SATA controller is broken. I hope so, since that’s an easy and cheap replacement.