Tom Van Harpen - Monday, March 20, 2017 11:48 AM
To be blunt, 2012 sucked until sp3 came out. It even had a bug where if you rebuilt a cluster index online under certain conditions, it would corrupt the table.
I strongly recommend that you upgrade your 2012 to the latest SP/CU NOW! Don't wait, just do it.
--Jeff Moden
Change is inevitable... Change for the better is not.