Originally Posted by
Tomas_J
We had the same problem - one Dyn2 was loosing settings quite often ( like 1 of 10 power cycles)... Temporary solution was to check settings after every power on cycle...Pretty annoying. But, after another drive lost its setting, that wasn't enough. Every drive was powered from separate switching 48V PSU through 3x4700 capacitors. The idea was, that Dyn2 looses settings, when supply voltage after power off falls slow (IIRC with those capacitors it took more than half a minute to fall below 3V). So we introduced relay for each drive, that cuts power line between capacitor and Dyn2 drive. Relays are powered from separate PSU (12V 1A in our case, also used to power cooling fans). After almost one year none drive lost its setting. So, I think, there is some firmware/ hardware flaw in these drives, but there's workaround.