Oracle Message ORA-27030 - skgfwrt: sbtwrite2 returned error

ERRORskgfwrt: sbtwrite2 returned error
CAUSEsbtwrite2 returned an error. This happens while writing a backup file during a backup operation.
ACTIONThis 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.

636847 Composite SAP note ORA-19511