A UPS will not much improve the reliability against sudden power loss. At least here in Europe it is much more likely that a PSU or other component fails than t

A UPS will not much improve the reliability against sudden power loss. At least here in Europe it is much more likely that a PSU or other component fails than that the power line is suddenly interrupted. And lost writes are a problem that all filesystems have. I recommend reading the paper "Parity Lost and Parity Regained" by Krioukov at USENIX 08...