Backup fails with Snapshot Error %1: Error EBAB03F1: Following Operating Sytem Occurred while performing requested operating: 'OS error 2147754760.'

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Article ID: 100023958

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Description

Error Message

Cause

A volume that contains the VSS shadow copy was forcefully dismounted before Symantec System Recovery was able to send a command to the VSS framework to break down the snapshot after a successful backup. This often occurs on a hidden Windows volume when the volume is included in a backup job with other volumes.

Resolution

Move the snapshot (Diff Area) to a different volume.
  1. Determine the volume where the snapshot is coming from, and the volume where the snapshot is being written to and being pre-maturely dismounted by opening the the Windows SYSTEM event log and locate the VOLSNAP error. Sample:

    Event Type: System
    Event ID: 16  
    Source: volsnap
    Error: The shadow copies of volume \\?...8ea-4945-b9c4-9d5bc3cb83a8} were aborted because volume \\?...2ab-4fc1-b140-2fc91bc2ab33a}, which contains shadow copy storage for this shadow copy, was force dismounted.
     
  2. Click Start, and then click Computer. Or Search and type COMPUTER and click on the name of the computer. ( Caution: When you change the location of the Diff Area, all previous shadow copies are deleted.  )
  3. Right-click any of the volumes listed, and then click Configure Shadow Copies. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue. Or, right-click and choose PROPERTIES, then select SHADOW COPIES tab.
  4. Click the volume for which the shadow copy failed, and then click Settings.
    (Note: If shadow copies of the volume are enabled, you must first disable them by clicking the volume, and then clicking Disable.)
  5. Set the Diff Area to a different volume by selecting a volume from the drop-down list under Storage area, and then click OK.
  6. Click OK to exit.​
This can also be done from a command prompt:
  1. Determine the full volume ID for the source and destination snapshot (diff area) volumes by opening Windows PowerShell.
  2. Type GWMI -namespace root\cimv2 -class win32_volume | FL -property Label,DriveLetter,DeviceID,SystemVolume,Capacity,Freespace and press ENTER.
    Example: Note the Volume ID outlined in red.
  3. To move the snapshot area, type (In this example, we tell the snapshot from C: to be created on D:) 
    VSSADMIN RESIZE SHADOWSTORAGE /For= C : /On= D : /Maxsize=UNBOUNDED (Warning: replace C:\ and D:\ with the appropriate drive letter(s) associated with the volumes from the event log)
  4. If drive letters do not exists, use the Volume ID. In this example, we are allowing the snapshot to be created on the same volume: 
    VSSADMIN RESIZE SHADOWSTORAGE /For={7fd55378-13e1-11e2-acd9-806e6f6e6963} /On={7fd55378-13e1-11e2-acd9-806e6f6e6963} /Maxsize=UNBOUNDED
  5. Exit PowerShell. Reboot the system to reset the related services, or restart VSS and VPROSVC services if restart is not possible.



 

Issue/Introduction

During a system backup, the following error occurs:Snapshot Error %1: Error EBAB03F1: Following Operating Sytem Occurred while performing requested operating: 'OS error 2147754760.'
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