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USB-Attached Backup Drive Now Failing with "Specified Backup Disk Cannot be Found" - 0x807800C5 RRS feed

  • 質問

  • Thanks in advance for the help.  I have a Windows Server 2012 R2 Essentials Server that has been running flawlessly for almost six months, including daily backups to a USB-attached 1.8 TB hard drive.  Total internal disk space is 900 GB of which only about 30% is used.

    Three days ago, backups started failing with the 0x807800C5 error and "specified backup disk cannot be found" error.  I've tried deleting all of the backups, reformatting the the USB drive, deleting the entire backup configuration and re-initializing, SFC on the backup drive and C drive (no errors)...

    No updates or software changes were installed between the time backups were working and when the process began failing.

    I have tried backing up via WBADMIN to other locations, including a new/different USB-attached hard drive and the C drive and they respond with the same error.

    VSSAdmin List Writers shows all writers stable - no errors.

    There are no virtual machines involved on the server.

    There are no other errors in the event log other than the backup error.  Below is a listing of the error message details.

    Thanks again.

     BackupTemplateID {CBDEBB8E-EADB-4B32-8314-44E8EE942B22}
      HRESULT 0x807800c5
      DetailedHRESULT 0x80780081
      ErrorMessage %%2155348165
      BackupState 12
      BackupTime 2016-01-10T17:48:01.451355100Z
      BackupTarget Hartman200 Backup Drive
      NumOfVolumes 2
      VolumesInfo <VolumeInfo><VolumeInfoItem Name="Esp" OriginalAccessPath="" State="12" HResult="-2139619199" DetailedHResult="0" PreviousState="9" IsCritical="1" IsIncremental="0" BlockLevel="1" HasFiles="0" HasSystemState="0" IsCompacted="0" IsPruned="0" IsRecreateVhd="2" FullBackupReason="2" DataTransferred="0" NumUnreadableBytes="0" TotalSize="0" TotalNoOfFiles="0" Flags="523" BackupTypeDetermined="1" SSBTotalNoOfFiles="0" SSBTotalSizeOnDisk="0" /><VolumeInfoItem Name="C:" OriginalAccessPath="C:" State="15" HResult="-2139619228" DetailedHResult="0" PreviousState="0" IsCritical="1" IsIncremental="0" BlockLevel="1" HasFiles="0" HasSystemState="1" IsCompacted="0" IsPruned="0" IsRecreateVhd="0" FullBackupReason="2" DataTransferred="0" NumUnreadableBytes="0" TotalSize="0" TotalNoOfFiles="0" Flags="1576" BackupTypeDetermined="1" SSBTotalNoOfFiles="0" SSBTotalSizeOnDisk="0" /></VolumeInfo>
      SourceSnapStartTime 2016-01-10T17:48:01.451355100Z
      SourceSnapEndTime 2016-01-10T17:48:57.809252500Z
      PrepareBackupStartTime <TimesList><Time Time="2016-01-10T17:49:13.484Z" /><Time Time="1601-01-01T00:00:00.000Z" /></TimesList>
      PrepareBackupEndTime <TimesList><Time Time="2016-01-10T17:49:13.500Z" /><Time Time="1601-01-01T00:00:00.000Z" /></TimesList>
      BackupWriteStartTime <TimesList><Time Time="2016-01-10T17:49:13.500Z" /><Time Time="1601-01-01T00:00:00.000Z" /></TimesList>
      BackupWriteEndTime <TimesList><Time Time="1601-01-01T00:00:00.000Z" /><Time Time="1601-01-01T00:00:00.000Z" /></TimesList>
      TargetSnapStartTime 1601-01-01T00:00:00.000000000Z
      TargetSnapEndTime 1601-01-01T00:00:00.000000000Z
      DVDFormatStartTime <TimesList></TimesList>
      DVDFormatEndTime <TimesList></TimesList>
      MediaVerifyStartTime <TimesList></TimesList>
      MediaVerifyEndTime <TimesList></TimesList>
      BackupPreviousState 9
      ComponentStatus <ComponentStatus></ComponentStatus>
      ComponentInfo <ComponentInfo></ComponentInfo>
      SSBEnumerateStartTime 1601-01-01T00:00:00.000000000Z
      SSBEnumerateEndTime 1601-01-01T00:00:00.000000000Z
      SSBVhdCreationStartTime 1601-01-01T00:00:00.000000000Z
      SSBVhdCreationEndTime 1601-01-01T00:00:00.000000000Z
      SSBBackupStartTime 1601-01-01T00:00:00.000000000Z
      SSBBackupEndTime 1601-01-01T00:00:00.000000000Z
      SystemStateBackup <SystemState IsPresent="0" HResult="0" DetailedHResult="0" />
      BMR <BMR IsPresent="1" HResult="-2139619199" DetailedHResult="0" />
      VssFullBackup false
      UserInputBMR true
      UserInputSSB false
      BackupSuccessLogPath C:\Windows\Logs\WindowsServerBackup\Backup-10-01-2016_17-48-01.log
      BackupFailureLogPath C:\Windows\Logs\WindowsServerBackup\Backup_Error-10-01-2016_17-48-01.log
      EnumerateBackupStartTime <TimesList><Time Time="1601-01-01T00:00:00.000Z" /><Time Time="1601-01-01T00:00:00.000Z" /></TimesList>
      EnumerateBackupEndTime <TimesList><Time Time="1601-01-01T00:00:00.000Z" /><Time Time="1601-01-01T00:00:00.000Z" /></TimesList>
      PruneBackupStartTime <TimesList><Time Time="1601-01-01T00:00:00.000Z" /><Time Time="1601-01-01T00:00:00.000Z" /></TimesList>
      PruneBackupEndTime <TimesList><Time Time="1601-01-01T00:00:00.000Z" /><Time Time="1601-01-01T00:00:00.000Z" /></TimesList>
      BackupFlags 0x1
      ComponentInfoSummary <ComponentInfoSummary ComponentInfoArrayPresent="1" TotalComponents="0" SucceededComponents="0" />


    Jim

    2016年1月10日 20:28

回答

  • Update and resolution...

    I was able to resolve the issue.  Two USB disks were attached, my backup disk and a more recent one.  The more recent disk - don't know how - was initialized and had an EFI partition on it even though it's not a boot drive, just a data disk.  I don't know why, but that EFI partition was in conflict with the EFI partition on the main boot drive / array and backup wouldn't work with both.

    After backing this disk up (backup functions per previous as long as system state is not selected), I used diskpart to clean the USB drive with the EFI partition and remove all partitions.  You have to use diskpart because you cannot remove a protected EFI partition in disk management.  I reinitialized and reformatted the disk (no EFI partition) and restored the data on it and now everything works.

    Hope this helps.


    Jim

    • 回答としてマーク JMC-Laketown 2016年1月24日 14:53
    2016年1月24日 14:53

すべての返信

  • Hi Jim,

    Thanks for your post.

    May I aks it only fails with backup to external USB? What about backup to local?

    Since you even couldn't found other errors except the "Specified Backup Disk Cannot be Found". From the current scenairo, it's more seems to be like that windows server backup can't recognize the external drive.

    Could you please test with replace a new backup target and see how is going?

    Please also check either a faulty cable or a faulty USB connector/port.  Adding or replacing a/the SATA card has fixed it. If all of the drives are affected,  we might  consider the cable or the port(s).
    Are you running any Antivirus that may result this issue?

    You could also refer to the threads discussed before.

    https://social.technet.microsoft.com/Forums/windowsserver/en-US/96f479ec-9cfc-4860-919b-b460525b1e08/sbs-2008-backup-fails-target-disk-not-found?forum=smallbusinessserver

    https://social.technet.microsoft.com/Forums/windowsserver/en-US/a7070f23-efb3-4b5f-a8d1-431857b70826/backup-fails-on-one-usb-disk-no-target-found?forum=smallbusinessserver

    https://social.technet.microsoft.com/Forums/windowsserver/en-US/e0a13641-f539-4af4-aa43-1c07b8467879/windows-server-backup-the-system-cannot-find-the-path-specified?forum=windowsbackup

    Besides, please try to install all the hotfix in your server 2012 R2 Essentials to see if it works.

    Since in server 2012 essentials the problem may related to the hotfix below.

    "The filename, directory name, or volume label syntax is incorrect" error when you attach a new drive in the backup schedule in Windows Server 2012

    https://support.microsoft.com/en-us/kb/2833738

    Best Regards,

    Mary Dong


    Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    2016年1月12日 2:51
  • Thank you.  I have worked through the items listed.  Here's the status.  I really appreciate your continued thoughts and ideas.

    Jim

    Test with a replacement drive...   

    - Tried that and any new drive connected receives the same error

    Anti-Virus

    - Been running AVG File Server Edition.  It's been working for the last six months with AVG and only stopped working last week.

    Remove, Reformat and Retry Drive

    - Tried that.  Same error.

    Try Drive on another computer

    - Works on other computers, but not on the server when it's plugged back in.

    Working with multiple USB backup drives

    - While I now have two connected, this started to fail before I connected the second drive.  The second drive is configured to backup the Windows clients - I've moved the backup directory from the server's primary RAID array to this backup disk.  The client backups are working correctly to this second USB-connected drive.  The server backup to the original drive continues to fail.


    Jim

    2016年1月13日 2:24
  • Hi Jim,

    Thanks for your reply.

    May I ask could you see the external drive in the disk management?

    Please also check the requirements for backup target drive in windows server 2012R2 Essentials

    https://technet.microsoft.com/en-us/library/jj635058.aspx?f=255&MSPPError=-2147217396#BKMK_Target

    And according to your second post, only server 2012R2 essentials backup to external drive fails. And "Tried that and any new drive connected receives the same error". You could also check if a faulty USB connector/port or there's something wrong with hard disk for the server. And please also confirm this in Essentials forum.

    https://social.technet.microsoft.com/Forums/windowsserver/en-US/home?forum=winserveressentials

    Best Regards,

    Mary Dong


    Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    2016年1月13日 5:48
  • Thank you again.  When Backup is disabled, I can see the drive in Windows Explorer and copy files to/from the drive.  It is functioning normally.  Again, this drive has been functioning correctly as a backup drive on this server for six months, up until last week.


    Jim

    2016年1月13日 13:18
  • Hi Jim,

    Please Check Shadow copy limit as well.

    Can u please post the recent backup error log output 

    (BackupFailureLogPath C:\Windows\Logs\WindowsServerBackup\Backup_Error_xxxxx.log)  ? 

    Thanks.


    • 編集済み Mdali313 2016年1月13日 18:15
    2016年1月13日 18:08
  • I have changed the shadow copy limit to unlimited and removed all previous shadow copies.

    I can plug the drive into my laptop (both a Windows laptop and Mac laptop) and the backup drive works just fine.

    The failed log reads:  

    Backup of volume \\?\GLOBALROOT\Device\HarddiskVolume2\ has failed. The specified backup disk cannot be found.


    Jim

    ...almost forgot:  but if I turn off backup from within Windows Server Console, I can see the drive in Windows Explorer and copy files to/from.  I can also turn windows backup back on and it sees the drive, reformats it and allows it to be successfully set up.

    The drive is working.

    2016年1月13日 19:45
  • maybe making some progress...   after configuring backup to the USB drive, running a backup (letting it fail), then disabling the backup...   I can browse the USB backup drive and find the log file.  I states the following:

    unable to access \\?\globalroot\device\harddiskvolume2\

    This UNC translates to the EFI partition on the main drive - the drive I am attempting to back up!  (not the backup drive as previously thought)

    To verify, i reconfigured backup so that only the C drive is backed up, not the "system information(recommended)" as listed in the backup settings.

    Backup now works!  But, I cannot backup the system state.  

    Why is this?


    Jim



    • 編集済み JMC-Laketown 2016年1月23日 20:23
    • 回答としてマーク JMC-Laketown 2016年1月24日 14:49
    • 回答としてマークされていない JMC-Laketown 2016年1月24日 14:49
    2016年1月23日 20:19
  • Update and resolution...

    I was able to resolve the issue.  Two USB disks were attached, my backup disk and a more recent one.  The more recent disk - don't know how - was initialized and had an EFI partition on it even though it's not a boot drive, just a data disk.  I don't know why, but that EFI partition was in conflict with the EFI partition on the main boot drive / array and backup wouldn't work with both.

    After backing this disk up (backup functions per previous as long as system state is not selected), I used diskpart to clean the USB drive with the EFI partition and remove all partitions.  You have to use diskpart because you cannot remove a protected EFI partition in disk management.  I reinitialized and reformatted the disk (no EFI partition) and restored the data on it and now everything works.

    Hope this helps.


    Jim

    • 回答としてマーク JMC-Laketown 2016年1月24日 14:53
    2016年1月24日 14:53