Windows Backup error "the system cannot find the file specified"

I'm using windows backup on a 2008 sp2 server to backup 4 hard drives to an external 2TB USB drive. The backup takes around 9 hours but it is a complete dump of all the data on the discs. Recently the backup has been completing but with errors "F: the system cannot find the file specified".
F: is just one of the volumes being backed and has been backed up succesfully in the past. The only thing on F: is a virtual machine which seems to be running OK.

The only thing I can see in the log that's immediately different is that F: has a state of "12" where the other drives have a state of "14"
Help greatly appreciated

the log for the backup is as follows:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="Microsoft-Windows-Backup" Guid="{1db28f2e-8f80-4027-8c5a-a11f7f10f62d}" />
  <EventID>14</EventID>
  <Version>0</Version>
  <Level>4</Level>
  <Task>0</Task>
  <Opcode>2</Opcode>
  <Keywords>0x4000000000000000</Keywords>
  <TimeCreated SystemTime="2011-03-21T03:46:27.113Z" />
  <EventRecordID>984</EventRecordID>
  <Correlation />
  <Execution ProcessID="3512" ThreadID="3692" />
  <Channel>Microsoft-Windows-Backup</Channel>
  <Computer>KDCVIRTUAL1</Computer>
  <Security UserID="S-1-5-18" />
  </System>
- <EventData>
  <Data Name="BackupTemplateID">{2524AE64-8839-41BB-8DB1-851A3544E1A8}</Data>
  <Data Name="HRESULT">0</Data>
  <Data Name="BackupState">14</Data>
  <Data Name="BackupTarget">KDCVIRT 2011_03_15 08:37 DISK_04</Data>
  <Data Name="NumOfVolumes">4</Data>
  <Data Name="BackupTime">2011-03-20T19:30:03.105Z</Data>
  <Data Name="HRESULT">0</Data>
  <Data Name="VolumesInfo"><VolumeInfo><VolumeInfoItem Name="C:" OriginalAccessPath="C:" State="14" HResult="0" DetailedHResult="0" PreviousState="9" DataTransferred="145842176000" NumUnreadableBytes="0" TotalSize="145842176000" Flags="2" SSBTotalNoOfFiles="0" SSBTotalSizeOnDisk="0" SSBVhdSize="0"/><VolumeInfoItem Name="E:" OriginalAccessPath="E:" State="14" HResult="0" DetailedHResult="0" PreviousState="9" DataTransferred="403394068480" NumUnreadableBytes="0" TotalSize="403394068480" Flags="2" SSBTotalNoOfFiles="0" SSBTotalSizeOnDisk="0" SSBVhdSize="0"/><VolumeInfoItem Name="F:" OriginalAccessPath="F:" State="12" HResult="-2147024894" DetailedHResult="0" PreviousState="9" DataTransferred="201765814272" NumUnreadableBytes="0" TotalSize="264678473728" Flags="2" SSBTotalNoOfFiles="0" SSBTotalSizeOnDisk="0" SSBVhdSize="0"/><VolumeInfoItem Name="G:" OriginalAccessPath="G:" State="14" HResult="0" DetailedHResult="0" PreviousState="9" DataTransferred="86751707136" NumUnreadableBytes="0" TotalSize="86751707136" Flags="2" SSBTotalNoOfFiles="0" SSBTotalSizeOnDisk="0" SSBVhdSize="0"/></VolumeInfo></Data>
  <Data Name="DetailedHRESULT">0</Data>
  <Data Name="SourceSnapStartTime">2011-03-20T19:30:03.082Z</Data>
  <Data Name="SourceSnapEndTime">2011-03-20T19:30:35.766Z</Data>
  <Data Name="PrepareBackupStartTime"><TimesList><Time Time="2011-03-20T19:30:38.063Z" /><Time Time="2011-03-20T20:47:20.687Z" /><Time Time="2011-03-21T00:18:12.769Z" /><Time Time="2011-03-21T03:00:17.641Z" /></TimesList></Data>
  <Data Name="PrepareBackupEndTime"><TimesList><Time Time="2011-03-20T19:30:38.332Z" /><Time Time="2011-03-20T20:47:20.739Z" /><Time Time="2011-03-21T00:18:12.899Z" /><Time Time="2011-03-21T03:00:17.727Z" /></TimesList></Data>
  <Data Name="BackupWriteStartTime"><TimesList><Time Time="2011-03-20T19:30:38.335Z" /><Time Time="2011-03-20T20:47:20.741Z" /><Time Time="2011-03-21T00:18:12.901Z" /><Time Time="2011-03-21T03:00:17.729Z" /></TimesList></Data>
  <Data Name="BackupWriteEndTime"><TimesList><Time Time="2011-03-20T20:47:20.687Z" /><Time Time="2011-03-21T00:18:12.768Z" /><Time Time="2011-03-21T03:00:17.641Z" /><Time Time="2011-03-21T03:46:02.268Z" /></TimesList></Data>
  <Data Name="TargetSnapStartTime">2011-03-21T03:46:02.640Z</Data>
  <Data Name="TargetSnapEndTime">2011-03-21T03:46:26.161Z</Data>
  <Data Name="DVDFormatStartTime"><TimesList></TimesList></Data>
  <Data Name="DVDFormatEndTime"><TimesList></TimesList></Data>
  <Data Name="MediaVerifyStartTime"><TimesList></TimesList></Data>
  <Data Name="MediaVerifyEndTime"><TimesList></TimesList></Data>
  <Data Name="BackupPreviousState">11</Data>
  <Data Name="ComponentStatus"><ComponentStatus></ComponentStatus></Data>
  <Data Name="SSBEnumerateStartTime">1601-01-01T00:00:00.000Z</Data>
  <Data Name="SSBEnumerateEndTime">1601-01-01T00:00:00.000Z</Data>
  <Data Name="SSBVhdCreationStartTime">1601-01-01T00:00:00.000Z</Data>
  <Data Name="SSBVhdCreationEndTime">1601-01-01T00:00:00.000Z</Data>
  <Data Name="SSBBackupStartTime">1601-01-01T00:00:00.000Z</Data>
  <Data Name="SSBBackupEndTime">1601-01-01T00:00:00.000Z</Data>
  <Data Name="SystemStateBackup">false</Data>
  </EventData>
  </Event>

ITSMEPJBAsked:
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noxchoGlobal Support CoordinatorCommented:
Perform CHKDSK f:/f from command line and try backup again.
0
ITSMEPJBAuthor Commented:
This showed no errors. I think I've solved the problem though.
I think i's down to the total size of the backup. I'm backing up around 1.8TB to a 2TB drive and it doesn't have enough space on the target drive. I've split the backup into two with two separate target drives and the backup runs smoothly.
It's a shame the error log show a problem with a source drive rather than a target.
0

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noxchoGlobal Support CoordinatorCommented:
Yes, completely dumb for Microsoft to show such a "user friendly" errors.
0
ITSMEPJBAuthor Commented:
Solved problem
0
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Windows Server 2008

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