--- In firebird-support@yahoogroups.com, "Leyne, Sean" <Sean@...> wrote:
>
>
> > svanderclock wrote:
> > > not sure that raid will help in database corruption vs shadow ...
> >
> > But I can assure you that maintaining a shadow will hurt
> > write performance.
>
> I would have said *kill* performance.
>
> The reason is very simple:
>
> - RAID controller manages disk IO at the hardware level
>
> - Software RAID manages disk IO at the OS device driver level.
>
> - Shadows manage disk IO at the application level (even if it database engine, to the OS it is an application).
>
>
> Sean
>