Exchange 2007 Full Backup Issue Error V-79-57344-918

Dear All,

After I  got the  error  message  when i am try to  take full backup  my Exchange 2007 Server     first  error is   VSS - Snapshot technology Failure   i also check the Services  its working at  Exchange 2007 ..

The Second  error  i got it  the log  file sector  didn't match .

Thanks for your  Assistance ..