ORA Database Error Messages ORA-15206: duplicate diskgroup string specified September 23, 2015 mpbod ORA-15206: duplicate diskgroup string specified Cause: A command specified the same diskgroup twice. Action: Specify each diskgroup only once. Back to previous menu Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)