Evento 8012 y 8001 con Exchange y NTBackup

Hola a todos,
Estaba haciendo una copia completa de mi Exchange 2000 estandar, empieza
normal, cuando llega a 5 GB dice que ya ha terminado y el reporte dice lo
siguiente:
WARNING: Portions of "\SRS MDB" cannot be read. The backed up data is
corrupt or incomplete
WARNING: Portions of "\Log Files" cannot be read. The backed up data is
corrupt or incomplete.
This file will not restore correctly.

Si alguien sabe porque da este error, agradeceré su ayuda.


Otros datos

En el servidor no tengo mas que Win y Exchange 2000

En el visor de eventos tengo los siguiente
Event Type: Error
Event Source: NTBackup
Event Category: None
Event ID: 8012
Date: 6/14/2005
Time: 3:50:34 PM
User: N/A
Computer: MAILHOST
Description:
The 'Microsoft Site Replication Service' returned 'Error returned from an
ESE function call (d).
' from a call to 'HrESEBackupSetup()' additional data '-'


Event Type: Error
Event Source: NTBackup
Event Category: None
Event ID: 8001
Date: 6/14/2005
Time: 3:50:35 PM
User: N/A
Computer: MAILHOST
Description:
End Backup of 'Mailhost\Microsoft Site Replication Service\SRS Storage'
Verify: On Mode: Append Type: Normal