A major fight over alleged spoliation of evidence and the potential for sanctions over electronic discovery may be shaping up in San Francisco federal court for the Oracle Corp. securities class action.

The dispute centers on a British author’s audio files of interviews with Oracle CEO Larry Ellison for “Softwar: An Intimate Portrait of Larry Ellison and Oracle” that now seem to have vanished. The digital recordings were made during the very period of class claims in In re Oracle Corp. Securities Litigation, No. C01-988MJJ.