"Robert E. Bruccoleri" <bruc@stone.congenomics.com> writes:
> I tried another load of the databases with fsync off (-F to
> the postmaster), and I encountered at least one invalid page
> header. Is there code in Postgres that handles the buffer cache
> differently if fsync is off?
I don't believe so.
You may care to read Joe Conway's recent tale of woe. Just because you
bought a pile of expensive hardware does not prove it's not a hardware
problem ...
regards, tom lane