"Kotala Zden�k" <Zdenek.Kotala@...> wrote in message > Is forced write
setting only IB/FB cache matter or switch off OS file

> cache too?

with forced write on AFAIK, FB tells the OS to flush the write buffer
immediately. I was under the impression that Windows takes this as a
non-cacheable write and puts it in its immediate queue. I don't know if
this is asynchronous or not.

You'll have to ask a Windows guru (i.e. not me), to see if there are any
settings to change the write profile.

HIH

JAC.