Now ParallelVarFiler is Fault tolerant to power failures etc. i have done a simulation of power failures and data file damages and ParallelVarFiler is recovering from power failures and damages of the data file ...
If AnalyzeVarfiler() returns ctCorrupt if there is a power failure or something like that that gives a corruption, you have to fix the format of the archive with FixVarfiler() that will fix the format of the archive and recover from a power failure corruption etc.