AOFO: Initialization failure on: "Shadow?Copy?Components" or "Microsoft Information Store". AOFO used: Microsoft Volume Shadow Copy Service (VSS). V-79-32772-8982 -- "VSS Snapshot error. A Microsoft Volume Shadow Copy Service (VSS) snapshot is already running on the target computer. Only one snapshot can run at a time. Try running the job later."

Article:TECH56448  |  Created: 2009-01-15  |  Updated: 2013-09-24  |  Article URL http://www.symantec.com/docs/TECH56448
Article Type
Technical Solution

Product(s)

Issue



AOFO: Initialization failure on: "Shadow?Copy?Components" or "Microsoft Information Store". AOFO used: Microsoft Volume Shadow Copy Service (VSS). V-79-32772-8982 -- "VSS Snapshot error. A Microsoft Volume Shadow Copy Service (VSS) snapshot is already running on the target computer. Only one snapshot can run at a time. Try running the job later."


Error



 I . V-79-32772-8982 -- VSS Snapshot error. A Microsoft Volume Shadow Copy Service (VSS) snapshot is already running on the target computer. Only one snapshot can run at a time. Try running the job later.

UMI code: V-79-10000-11233

UMI code :V-79-57344-34110

II .  Final error: 0x80042316 - 0x80042316 (2147754774)
 

III . v-79-32772-8973 Final error: 0x8004230d - 0x8004230d (2147754765)

V-79-10000-11224 VSS Snapshot error. Another snapshot provider has already created an active snapshot for this volume. Check the Windows Event Viewer for details.


Solution



 
Sometimes the VSS providers are hung or in an error state and this error is returned falsely because the software assumes snapshot generation is the reason for the lack of response. There is generally an absence of VSS errors in the Event Viewer of the machine when this is the case. Before attempting any of the steps below, attempt to stop and restart the VSS services on the problem machine or reboot the machine and then re-attempt the backup operation.
 
1. Confirm a backup is not running in the Native NT Backup Utility, reboot the server the failure is occurring on, and run another backup with Backup Exec to test.  If the backup still fails with the same error, confirm that the Microsoft Shadow Copy Provider and Volume Shadow Copy Services are started, then run a test backup of just the System State in the Native NT Backup Utility.  If the System State Backup fails to complete successfully with the Native NT Backup Utility, a support case will need to be opened with Microsoft to address this issue.

2. If the System State Backup with the Native NT Backup Utility does complete successfully, perform the steps in the followings Tech notes to check the status of the VSS Writers:
  http://www.symantec.com/docs/TECH42921 
 
3. Attempt to run another backup with Backup Exec once again.  If the backup continues to fail with the same error, confirm that no other backup/open file technology applications (i.e.: Legato, ArcServe, Backup Exec System Recovery (BESR), Continuous Protection Server (CPS), etc...) are running backups at the same time that the Backup Exec backup runs. If other applications like BESR/SSR or CPS are installed, modify the backup schedules so that they do not overlap with Backup Exec jobs.

4. Check the Windows System Events on the server experiencing the issue.
  • Event ID 7001
    • VssAdmin: Unable to create a shadow copy: Another shadow-copy creation is in progress, so the current shadow copy cannot be created.  There are a number of common scenarios causing this problem:          * If Shadow Copies of Shared Folders is set up, ensure that no two volumes have schedules that lie within five minutes of each other. * If automatic backup of any form is scheduled, ensure that the backup schedule does not overlap with the schedule            used for Shadow Copies of Shared Folders.    Generally, retrying the operation after a few minutes or changing the schedule of an automatic task should fix this problem.Command-line: 'C:\Windows\system32\vssadmin.exe Create Shadow /AutoRetry=15 /For=\\?\Volume{GUID.EN_US}\'.

If the VSS issue is not with the System State, it may be with one of the volumes on the server as in the example noted above.

If Event ID 7001 is seen, confirm which volume on the server that cannot be snapped by running the following command:

vssadmin list volumes

This command will list out the GUIDs for the volumes wherein you can match GUID shown in the Windows Event. Once confirmed, ensure Shadow Copies are not being created at the time of the Backup.

You can test VSS  for the particular volume with the following command:

vssadmin create shadow /for=c:

Change 'c' for the actual volume you wish to snap. 

5. If running in a clustered environment, see if there are Event Viewer errors related to problems with the cluster such as communication or networking errors, hardware or file system related errors, or any event that is occurring around the time jobs are failing, as those will need to be resolved before Backup Exec will be able to perform reliably in the environment.

6. Generally, it is a best practice to:

  • Defragment and run CHKDSK against any problem systems
  • Update the drivers and/or firmware of any devices that are suspected
  • Make sure all Windows, Backup Exec, virtual software and clustering software service packs and hotfixes have been installed
  • Upgrade software versions as appropriate
  • Have at least 20% disk space free on every volume if possible

Supplemental Materials

SourceUMI
ValueV-79-32772-8982
Description

VSS Snapshot error. A Microsoft Volume Shadow Copy Service (VSS) snapshot is already running on the target computer.


SourceUMI
ValueV-79-10000-11233
Description

VSS Snapshot error. A Microsoft Volume Shadow Copy Service (VSS) snapshot is already running on the target computer.


SourceUMI
ValueV-79-57344-34110
Description

VSS Snapshot error. A Microsoft Volume Shadow Copy Service (VSS) snapshot is already running on the target computer. Only one snapshot can run at a time. Try running the job later.


SourceEvent ID
Value7001
Description

Unable to create a shadow copy: Another shadow-copy creation is in progress, so the current shadow copy cannot be created.


SourceUMI
Valuev-79-32772-8973
Description

Final error: 0x8004230d - 0x8004230d (2147754765)


SourceUMI
ValueV-79-10000-11224
Description

VSS Snapshot error. Another snapshot provider has already created an active snapshot for this volume. Check the Windows Event Viewer for details.



Legacy ID



295310


Article URL http://www.symantec.com/docs/TECH56448


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