ORA Database Error Messages ORA-15077: could not locate ASM instance serving a required diskgroup September 11, 2015 mpbod ORA-15077: could not locate ASM instance serving a required diskgroup Cause: The instance failed to perform the specified operation because it could not locate a required ASM instance. Action: Start an ASM instance and mount the required diskgroup. 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)