Robert Sosinski <rsosinski(at)ticketevolution(dot)com> writes:
> We are running Postgres 9.1.3, and after stopping it by physically shutting off the machine, we rebooted and now get this error whenever we try to start it.
> 2012-10-02 13:54:30 PDT PANIC: GIN metapage disappeared
This looks like an issue that was fixed in 9.1.4. Update and it should
start successfully (assuming your machine does fsyncs correctly;
otherwise you might have some actual data corruption there ...)
regards, tom lane