Cause
An i/o error occurred when attempting to write the header to a log member that is being added to an existing group.
An i/o error occurred when attempting to write the header to a log member that is being added to an existing group.
See accompanying errors. Fix problem or use another file.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/9262276
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