ORA-27028: skgfqcre: sbtbackup returned error
Cause: sbtbackup returned an error. This happens when creating a backup file during a backup operation
Action: This error is returned from the media management software which is linked with Oracle. There should be additional messages which explain the cause of the error. This error usually requires contacting the media management vendor
https://support.oracle.com/
http://www.oracle.com/