On Fri, Aug 2, 2013 at 12:51 AM, Klaus Ita <klaus@worstofall.com> wrote:
> Isn't it a funny coincidence, that we also had a corruption of that
> same/similar type?
>
> my disk was quite confidently not tampered. I am wondering: Does PG sign, or
> checksum wal_files? Is the integrity of wal_files ensured by any mechanism?
> Because if it IS, then - in our case - it's a corruption caused BY the
> postgres master server. I can replay the wal's and re-create the same error
> over and over.
Corruption can hitch a ride on a WAL full page image without much
difficulty, as long as the page header looks legit (from what I've
seen so far, a bad page header will prevent the system from doing much
with it, so no FPIs will be generated).