ORA-27190: skgfrd: sbtread2 returned error
Cause: sbtread returned an error. This happens while reading a backup file during a restore 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/