Methinks If it was marked unusable then the instance would likely have crashed the first time smon used it as an access path to the data in that table On 25 Aug 2010 18:01, "Daniel Fink" <daniel.fink@xxxxxxxxxxxxxx> wrote: I'm a little bothered by the fact that a known corrupt index would be used to rebuild itself. I would expect 1) The rebuild to fail 2) The rebuild to use the table data as the source One question in my mind is what was the index state? Was it still marked as good in the data dictionary despite these errors? Should it not have been marked as corrupt/unusable? ------- Original Message ------- On 8/25/2010 4:52 PM Jared Still wrote: On Wed, Aug 25, 2010 at 9:22 AM, Evan Pettrey <jepettrey@xxxxx -- //www.freelists.org/webpage/oracle-l