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QNAP NAS - Denies Access 10 Hours into Veeam Backup Job

Posted on 2015-02-07
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Last Modified: 2016-02-25
I have Veeam 8.0 with NetApp SAN backing up to Qnap TS-1270U-RP NAS. If my Veeam job goes pass 10 hours I get the following access denied error.

"Processing FileServer Error: Access is denied. Failed to write data to the file [\\qnap01\Veeam\Group 2\Group 22015-02-07T104841.vib]. Failed to download disk. An existing connection was forcibly closed by the remote host Failed to upload disk. Agent failed to process method {DataTransfer.SyncDisk}."

I also have an iomega PX12 NAS that has never experience this error, even after running 10 hours. This points a big finger at the Qnap. I have open tickets with both Veeam and Qnap but they have not been helpful yet.  Here is what I have tried so far that has not helped:

1. VMware Proxy mode Direct SAN access and Network.

2. Recreating jobs and using  3 different Veeam server (all of which work great with the iomega NAS)

3. Changed Qnap between dual NIC load balance and single NIC (other NIC disabled and Cisco switch port-channel removed).

4. Upgraded firmware on both Qnap and Veeam to latest version

Any one run into this problem before?  Suggested fix?

Thanks for the help in advance!
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Question by:ccairn
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Author Comment

by:ccairn
ID: 40612401
Qnap support had me disabled hard disk standby mode after 30 minutes and changed to allow Highest SMB Version from SMB 2.0 to SMB 3.0. I restarted the Qnap and tested again Saturday and it still failed.  So I am still looking for a fix.
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Accepted Solution

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ccairn earned 0 total points
ID: 40639759
I am disappointed that no Experts cared to even try to help me but I will be nice and post the fix.

This is now resolved.  It is related to domain authentication. It seems like a domain authentication token is timing out, digging deeper with Qnap on this for more details.  But fix is just to set Veeam to authentication with the Qnap local admin credentials to bypass domain authentication. I successfully ran a 16hr job without getting denied access at the 10 hour mark.  Also, simultaneously tests with robocopy passed or failed depending on if the job used local or domain authentication respectively.
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