I have SATA hard drives and I just noticed if you go into device manager and
look at the properties of the hard drives, under policies, there are a
couple of new settings. I have an option for Optimize for performance,
which is grayed out, and below that are two options for "Enable write
caching" and "Enable advanced performance" along with explanations of what
they do. My setup has only the "Enable write caching" selected.

Does anyone know how this is determined by Vista? Does this depend on each
drive, or is this something in addition to the write caching some drives
have. Anyone know how much cache they are talking about and is it in
addition to the drives cache?

I guess my basic question is, what does the "Enable write caching" do
exactly? I haven't tried changing my power settings to see if that makes
any difference.

Thanks,
Clark