Several VSS writers fail and my backups are failling too. Need help!

Several VSS writers fail and my backups are failling too. Need help:

I have a desltop installed SP3 x 64 XP and a laptop with seven x 64 SP1. In both the machine that my backups fail. I'm trying to back up data by using boats to storage, backup Windows also is failling. I'm taking a full backup on a USB external drive (2 TB).

I did "vssadmin list writers" and showing several writers are in the failed State.

I've done SFC/scannow, it did not help. There is no error in the disk and Chkdsk.

I don't know how VSS works and how to solve the problem. Help, please!

A lot of people told me they found this informative article. That's why I upgraded that and display back again.

-------------------------------------------------------

Before you stat is working on this issue make sure that the volumes have no system disk/file error. Run Chkdsk and ensure.

(1) in the case of a failure of backup/writer, we first check the drivers associated with the VSS backup.

These drivers are:

VOLSNAP. SYS

NTFS. SYS

SWPRV. DLL

-Check the version of above mentioned MS 3 files and update using MS Hotfix.

If we have installed other suppliers, who might be the supplier of StorageCraft, Symantec suppliers and suppliers of Acronis, he must ensure that their files are also updated.

Note: You can see the list of suppliers using this command: VSSADMIN LIST PROVIDERS

Some of the DRIVERS PROVIDER commonly find are:

stcvsm.sys

symsnap.sys

snapman.sys

(2) this step is performed only when we find him

VSS writers in a failed State. If we find the stable writers and backups still fail, or we get errors, do not perform this step if you please.

In this case, the VSS writers fail, we can delete the following registry key, after of course saving and restart the server.

HKLM/Software/Microsoft/EventSystem/{26c.../Subscriptions.

This key will be automatically recreated when you restart and writers should return to the stable state.

The writers pending the completion status is not a problem. It's also good that Stable.

We can do on the Server 2003, 2008 and 2008 R2 OS as well.

However, in Windows Server 2003, after you delete and restart the "vssadmin list writers" server cannot display all the writers, in this case must register the dll:

For a list of the dll files to register, please check KB: http://support.microsoft.com/kb/940184

Note: The reinstatement of dll in Windows Vista/2008 and especially is NOT recommended.

(3) if we have only one / specificwriter (s) in a State of failure, which would always be SQL, EXchange, IIS or NTDS, then we have need to revive their respective service Console of service.

If they fail repeatedly, then make sure that the application and its components are updated. See their respective engineers immediately. Make sure that the latest service packs and patches are installed.

(4) make the foregoing, resolves generally 80 to 90% of the questions. If we believe that the issue is occurring, or we have VSS event errors, it may be the providers, the origin of the problem. If the creation of the snapshot does not properly, it can affect writers and other components involved.

Please check providers using "vssadmin list providers. If we find any other provider, other than the Microsoft software shadow copy provider, we have to remove from the list.

To do this: start the registry editor.

HKLM/System/CurrentControlSet/Services/VSS/suppliers/GUID.

One GUID would be for Microsoft Software Shadow Copy provider. The other GUID would be for other providers such as StorageCraft. We will save the GUID, and then delete it. Then restart the machine.

Now when we do vssadmin list providers, we will see only the default Microsoft provider.

I have seen in many cases where our supplier of StorageCraft may not work properly and continue of not not the authors. In such

case, if we get rid of the supplier, then the issue is resolved and not re occurs.

-However this would impede the functionality of StoaregCraft or any other similar to this backup software.

That's why to engage respective software tech support for further assistance.

(5) If a shadow copy is enabled on the volume, make sure that the storage area is set to the default location.

For example:

If we take a snapshot of C: then the storage area should be C:

We are changing that, if we do not have enough free space (at least 300 MB) free.

We can click with the right button on the volume, goto the cliché tab and change it accordingly.

Also note that the minimum value of the storage area should be 300 MB and maximum can be 3000 MB.

We can also set any value between the two, which is a multiple of 300, 600, 900, 1200, 1500 etc... According to the available space.

In the cases where errors in the event viewer on wait times (event id: 12298, 12310, 2004, 12290) then we also need to put the MinDiffArea in the registry.

HKLM/System/CurrentControlSet/Services/Volsnap

Right side, new DWORD VALUE - "MinDiffAreaFileSize" - change and set the value between "300-3000 Mo" or any multiple

300 between the two. Ideally, we can define it on 3000 MB which works even better if we have space.

Ref: http://support.microsoft.com/kb/826936

(6) also, please make sure we have plenty of free space. If we go by the book, a snapshot requires at least 10% of the volume

to be free.

Storage controllers (SCSI/RAID controllers) could also be a problem and may need to be updated.

Tags: Windows

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