System state backup with BE 15 failed, why?

This is using Symantec Backup Exec 15 on MS Windows 2008 R2 server w/sp1. I setup scheduled job to backup data, all can pass without problem. However, my user has a request to backup the system state. Now, I tried to run the backup, all the backups failed with the following errors:

V-79-57344-34108 - An unexpected error occurred when cleaning up snapshot volumes. Confirmed that all snapped volumes are correctly resynchronized with original volumes

Backup- \\servera\system?state
The item \\servera\system?state\system files\system files in use - skipped
the snapshot warning. file c:\windows\system32\tasks\* /s is not present on the snapshot
the snapshot warning. file c:\windows\tasks\* /s is not present on the snapshot
warning: "\\servera\system?state\task scheduler\tasksstore" is a corrupt file. This file cannot be verify.
vss snapshot warning. file c:\windows\vss\writer\*.xml is not present on the snapshot
vss snapshot warning. file c:\windows\system32\wbem\repositary\*.* /s is not present on the snapshot

As for this scheduled backup job, I put VSS Snaphot - using Microsoft VSS.

Appreciate your help
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MichaelBalackAuthor Commented:
I just tried to run the backup, and it fails again. I saw the error code - e000fedf. When I double-click to see the job details, it shows getting job history..., but at the see nothing.
A KarelinCommented:
Check settings for shadow copies on your disks.
MichaelBalackAuthor Commented:
All shadow copies disabled.
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A KarelinCommented:
Do you have enough free space?
MichaelBalackAuthor Commented:
Both c and d drives got plenty of  free spaces.
A KarelinCommented:
All shadow copies disabled.
Is "Max size" "No limit"?
MichaelBalackAuthor Commented:
All 2 \\?\Volume{, and C:\ and D:\ are DISABLED in "Next run time".

Highlight C:\, and select "settings" shows Maximum size: use limit 320 mb. Used 320 mb and maximum 320 mb.
It shows 3 shares.
A KarelinCommented:
Try to remove the limit to see whether it resolves the problem.

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MichaelBalackAuthor Commented:
Also found that the volume shadow copy service is started all the time.
A KarelinCommented:
I check mine. It has Manual Startup Type.
MichaelBalackAuthor Commented:
Hi Karelin,

Yes, the service is in Manual startup, but, it is "started" all the time.

I've increase the c: drive from 320 mb to 28649 mb.
Run a chkdsk /f on all your disk's partitions to repair the file-systems. This needs a reboot and the chkdsk will be run while booting, if the disk-space is large this can take very long, so make sure you do this "off-hours", when no one is using the server.

When done, try the backup again.
MichaelBalackAuthor Commented:
After remove the max on 320 MB, the NTBackup on system state took about 4 hours and completed successfully. After that, system state backup using SBE 15 also completed successfully. Thanks for A Karelin of pointing out the max capped on 320 mb for C: Drive.

Appreciate a lot.
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