windows server backup exchange 2010 yedekleme problemi

Merhaba..

Benim sorunum exchange 2010 sunucumuz var geçen haftadan buyana  yedekleme yapamıyorum. logları temizlemek için full yedekleme yapıyorum

yedeklemeyi başlatıyorum yüzde 97 bitime az kala hata veriyor.

 event id   BACKUP 565 

The consistency check for the component 'd48dc6f4-67b1-418d-a985-bf7c44ecd554'\'Microsoft Exchange Server\Microsoft Information Store\EX1' has failed. The application 'Exchange' will not be available in the backup created at '‎2012‎-‎03‎-‎31T00:23:35.921189800Z'. Review the event details for information about consistency check issues. 

event id   ESE 480

eseutil (12564) JetDBUtilities - 14164: The log file \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy6\exchangeserverdata\Microsoft\Exchange Server\V14\Mailbox\bienseramik\E03001B3E1E.log is damaged, invalid, or inaccessible (error -1021) and cannot be used. If this log file is required for recovery, a good copy of the log file will be needed for recovery to complete successfully.  

event id  ESE 481

eseutil (12564) JetDBUtilities - 14164: An attempt to read from the file "\\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy6\exchangeserverdata\Microsoft\Exchange Server\V14\Mailbox\bienseramik\E03001B3E1E.log" at offset 171008 (0x0000000000029c00) for 512 (0x00000200) bytes failed after 1 seconds with system error 23 (0x00000017): "Data error (cyclic redundancy check). ".  The read operation will fail with error -1021 (0xfffffc03).  If this error persists then the file may be damaged and may need to be restored from a previous backup.  

 birde  herhangi bir sürücüye gelip sağ tuş yapıp

configure  shadow copies.. geldiğimde aşadaki görünmekte. c d f ile birlikte 

  \\?\Volume{efc4e7c2-98dd-11e0-ace5-806e6f6e6963}

bu hataların bir çözümü varmıdır.?yardımınızı bekliyorum.

Teşekkürler..