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Backup of VM's failing after moving them to a new LUN

Posted on 2011-03-01
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Last Modified: 2013-12-01
Good day,
 Using Backup Exec 12.5 I can no longer backup my VM's using the Transport mode of 'SAN'. But when I ran a test backup of a VM using the NBD mode it completed successfully but took awhile. Here's what has changed:
1. I had 2 LUNS (each one was 850Gig - labelled LUN 1 & LUN 2)
2. We added a 3rd LUN (1.8TB - labelled LUN 3)
3. I moved all my VM's to LUN 3 so that I could re-configure LUNS 1 & 2, blow them away and make it one big LUN - now labelled LUN 0)
4. So now I have 2 LUNs - labelled LUN 0 & 3
The 2 LUNs are both visible in my 2 ESX 4.0 hosts and I have VM's residing on both of them.

The error I get in Backup Exec is:
Final error: 0xe000954c - An error occurred while running the VMware 'vcbMounter' command to back up a virtual machine. See the job log for details.

'V-79-57344-38220 - Backup of the virtual machine 'servername' failed. VMware VCB framework reported the following error'

That's all it gives me. No following error. I've researched the link and every connecting link for Symantec. I've restarted the vcbmounter service hoping it would re-scan the LUN's.
Is there something else I would need to refresh that's causing this?

Thanks all,
BW
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Question by:bwinkworth
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by:danm66
ID: 35011945
where is your VCB proxy?  you probably need to zone/present the LUN to your proxy server so it can see the VM's files.
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Author Comment

by:bwinkworth
ID: 35011961
I was reading about that but I don't think I have a proxy. Just a SAN, my fibre switches and my Management server that runs the Backup Exec.

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by:danm66
ID: 35012233
NBD means it is using the network to copy the data though the management network of one of the hosts.

If the others work through SAN mode but not this one, then you have the VCB software installed on a physical Windows system somewhere.  It "should" be on it's own server but it might be on the BE server or your VC or ???.  or if you don't have too many servers in your datacenter, look to see which ones have fiber going to the back.  :)
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Author Comment

by:bwinkworth
ID: 35027332
Is there a way to check and see if my LUNs are being presented correctly to Backup Exec? It seems like something just needs to be reset. The proxy is the server that Backup Exec resides on and temp files go into a temp folder on my D drive.

Thank you
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Expert Comment

by:danm66
ID: 35028716
From the BE/VCB proxy system about all you can do is to view what targets are being seen by the HBA.  You may already have something installed that can do this.  QLogic has a SanSurfer utility you can install on Windows to manage their HBA's.

You won't be able to change the zoning or presentation from there, though.  That will be controlled on the fiber switches or the SAN.  I would start with the SAN, though, as the switches might be set for dynamic zoning.  On our NetApp, we have to add the appropriate Initiator Group to each LUN that we want to present to all of the hosts within that IG.
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Author Comment

by:bwinkworth
ID: 35028767
Thanks danm66. I did go into the storage array yesterday and found out that the fibre switches themselves were not mapped to any LUNs. So I did map each (2) switches to the 2 LUNs which is why I'm thinking something needs to be updated.

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danm66 earned 300 total points
ID: 35029424
oh, ok.  You could reboot your backup server, if you haven't already.  That should refresh the seen LUN's.  I'm not sure if you go into device manager and scan for hardware changes if that will do it or not.  
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Author Comment

by:bwinkworth
ID: 35031257
Well just found out that I need to install Backup Exec 2010 R2 because I'm in the process of upgrading from ESX 4.0 to 4.1 and symantec guys told me that 12.5 isn't compatible. I'm doing that tomorrow and a reboot will be required so I'll let ya know how it goes.

Thanks,
BW
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Author Closing Comment

by:bwinkworth
ID: 35037612
Haven't installed the new BE2010 yet. I'll do it this weekend. I did restart the server this morning and the backup completed fine with the transport mode using SAN. Much faster that way then doing the NBD through the network. Woohoo. Thanks a lot for the help danm66.

BW
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Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

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