Can anyone help me?Creating the shadow copies in the file server cluster ,there are some errors occured, OS version is WSS 2012

Question

I construct a failover cluster(file server,AP module) for sharing files by WSS 2012,and I want to use the shadow copies to backup my data,but when making  a shadow copies on the volume which  is added to the cluster(not the CSV,just add
it to the cluster and use it to share files,it plays the role of file server),there are some errors occured, these errors result in the shadow copies failed,error likes the following pictures:
1: the disk F is added to the cluster,first I make the shadow copies by click the right key of mouse on the disk F,and chouse the configeration shadow copies,and click the settings, then click the schedule , and I wait just a few seconds, the error is appeared,like
this picture 1, the wait operation timed out,and then ,
I click the schedule button once again,a different error occured,like the following picture," the object already exists",if i don't set the schedule at first ,use the default shedule,and click the enable button also the same  error must 
accure
but the only diffrence is that, a shadow copy time point is created, also ,you can make the shadow copies by click " create now", that is creating the shadow copies manually. Although it can succesfully make the shadow copies, but when I select
a time point to revert, error  occured, "A volume that contains operating system files or resides on a cluster shared disk cannot be reverted" 
In a word,all the errors above make the shadow copies by schedulling failed,except making the shadow copies manually,but what makes me confused is that I have ever maked the shadow copies succesfully by schedul a policy,I don't know what makes it succesful,
it's small probability, most of time ,it's failed.No matter what kind of situation, revert must be failed.
I'm sorry for my pool english , it's the first time for me getting help in forum by english ,I don't know if I descripe my question clearly, also ,other method like the link
http://technet.microsoft.com/en-us/library/cc784118(v=ws.10).aspx I have tried,but the same errors occured.Can anyone tell me How can I make the shadow copies in File Server
cluster（AP module）？And I make a mistake in operating？ Looking forward for your reply.Thanks!

Answer 1

Hi,
Please check the following 2 places:
HKEY_LOCAL_MACHINE\Cluster\Tasks
C:\Windows\System32\Tasks
First please compare permission settings of the folder C:\Windows\System32\Tasks with a working computer. Correct permission settings if anything wrong. Specifically, confirm you current account do have permission on this folder.
As it said "object already exists", find the schedules you created before, backup and delete all these schedules in both registry key and folder.
Then test to create a new schedule to see if issue still exists.
Meanwhile what kind of storage device you are using? The issue could occur on specific storage device, so test to enable shadow copy on a local disk to see if that will work.
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Thank you for you reply.On the local volume,all of these errors will not occur, but the volume in the file server cluser.There is no value in HKEY_LOCAL_MACHINE\Cluster\Tasks. On local volume, everything goes well about the shadow copy, so I do not
think something is wrong about the permission settings of the folder C:\Windows\System32\Tasks.Storage device  is a SAN,we use RAID6 and provide the LUNs to the NAS engine, and the make the volume on these LUNs, Is Angthing wrong? Hope for you
reply~~