Hello,
This error can occur if, during a Shadow Copy Components data protection operation, if a VSS Application Writer involved in the operation reports a failed status, then the data protection operation will fail.
You can follow the troubleshooting stpes given below:-
1.Check the Writer status by following the TECHNOTE:
Title:-
How to troubleshoot the error "A failure occurred querying the Writer status" (a000fed1 HEX or e000fed1 HEX) using VSSADMIN
http://support.veritas.com/docs/261993
2.If the VSS Application Writer failure does not reset after a period of time, Backup Exec for Windows Servers continues to fail, or the native backup utility fails, then attempt to reboot the system and contact the specific company that produced the VSS Application Writer for further assistance.
For more information regarding what may cause the Shadow Copy Components to fail, please refer to the Microsoft Q article 826936.
If you run a check on the writers and find that tehy are not working then you can apply a Microsoft patch by referring the article mentioned above:Microsoft Q article 826936