2012 Essential R2 Backup unsuccessfull with error code 2147942634

Question

Hi, a planned backup on win srv 2012 essentials R2 terminates unsuccessful with error code 2147942634 and the text "more data is abailable" when beginning backup with the EFI start partition. The other, usually follwing backup-locations,
do not start backup thereafter. Every 2nd backup seems to be affeted. Manually started backups work fine. Mike.

Answer 1

Hi Mandy,
some more monitoring gets these additional info:
- no, it's not a question about "backup once" or scheduled. Every second scheduled backups does not run (backup schedule ist daily 12:00 and 23:00. 12:00 backups are fine, 23:00 backups fail)
- the recommended article provides no help, but checking the event viewer windows aplication points to error ID 517:
- details to this error ID 517:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
  <Provider Name="Microsoft-Windows-Backup" Guid="{1DB28F2E-8F80-4027-8C5A-A11F7F10F62D}"
/>
  <EventID>517</EventID>
  <Version>1</Version>
  <Level>2</Level>
  <Task>0</Task>
  <Opcode>0</Opcode>
  <Keywords>0x8000000000000000</Keywords>
  <TimeCreated
SystemTime="2015-03-02T22:02:44.547827700Z" />
  <EventRecordID>135619</EventRecordID>
  <Correlation
/>
  <Execution ProcessID="4648" ThreadID="11988" />
  <Channel>Application</Channel>
  <Computer>S12ER.SV.local</Computer>
  <Security UserID="S-1-5-18" />
  </System>
<EventData>
  <Data Name="BackupTime">2015-03-02T22:00:19.562212400Z</Data>
  <Data Name="ErrorCode">0x800700ea</Data>
  <Data Name="ErrorMessage">%%2147942634</Data>
  </EventData>
 </Event>
Mike