Deduplication and virtualized backup – new supported scenario

Update 18.11.2014

The needed Update KB3000850 to get the support, mentioned at the TechEd Barcelona 2014 Session about VDI, is coming across.
It’s included in the November 2014 update with roughly 700 megs.
You can find it via Windows Update or here.

Deduplication and virtualized backups were announced as new supported scenario at the TechEd 2014 embedded in a VDI and Deduplication session.

Windows Server Data Deduplication at Scale: Dedup Updates for Large-Scale VDI and Backup Scenarios

Actually it’s nothing new, it was basically working already and I’ve been doing this since the early days of preview 2012 R2.
But now it’s officially supported by Microsoft.

The basic idea is to lay down all backup VHDX made by DPM Server on Scale-Out-Fileservers.
So the SOF can do exactly the same what like in a VDI environment and dedup all the drives.
I can totally agree with dedup rates above 50% and up to 80% in real world scenarios.

creating Recovery Points fail after updating to System Center 2012 R2 UR4 – Connection to VMM lost/refused

Two days ago the final release of UR4 for SCDPM 2012 R2 came around. There’s still no deduplication support available but this isn’t the point right now. If you use Uninterrupted Data Protection with Virtual Machine Manager, you may encounter the same error as me:

Description:    DPM was unable to establish a connection with the Virtual Machine Manager (VMM) server.
Server name: 

Exception Message: Type: System.ServiceModel.EndpointNotFoundException, Message: Could not connect to 

net.tcp:// The connection attempt lasted for a time span of 

00:00:05.0829204. TCP error code 10061: No connection could be made because the target machine actively refused it 

[IPv4/IPv6 Adress]:6070.  (ID 33400)

For whatever reason most of the DPM Servers I already updated forgot what they have been doing for months.

Re-establishing the connection helped.

Set-DPMGlobalProperty -DpmServerName  <DPMServerName> -KnownVMMServers <VMMServerName>



Hyper-V virtual machine backup leaves the VM in a locked state … does it?

Update 10.10.2014

Now I have a better view and I can see that one other cluster have the described problem.
With VMM you can get the message if you try to move, start up a VM:

Error (12711)
VMM cannot complete the WMI operation on the server ( because of an error: [MSCluster_Resource.Name=&quot;SCVMM SOF-Prev-02&quot;]
The requested operation can not be completed because a resource has locked status (0x1748)

Failover Cluster Manager will say “The resource $VM is locked.”

From roughly around 70 VMs almost a third can’t be moved, started up or something else.

Really painful is the fact that you can’t do anything with the Hyper-V Host itself.
Trying to get ’em in paused mode for example.

Hyper-V-resource locked

Dynamic Optimizing is getting crazy as well. 😉
Applying the Hotfix seems to be working.

Continue reading

Linux on Hyper-V – a summary 10.2014

I struggled with a Live Backup issue on Ubuntu 2014 LTS a while ago as ralish from Stockholm DevOps describes here.
The problem was a broken installer meta package and ends up in a missing kvp deamon if you tried to install it on Ubuntu.
This daemon is used to interact between Host and VM to get a consistent backup state during snapshot creation on the Hyper-V Host.
So at the end, Backups without kvp can be risky due to a service interruption of the VM workload(s).

A screenshot from the DPM 2012 R2 Backup console shows the offline state.

In the meantime, the bug got fixed, Live Backups without service interruption can be taken, the sun is shining again and so it’s time to wrap some things up and give you a short overview about Hyper-V and common Linux Distributions.

Continue reading

DPM 2012 SP 1 – Tape import and recataloging

Within the last days I was switching from Data Protection Manager 2012 beta SP1 to the final Build which is available for TechNet and Volume Licensing customers at least since the 1st of January.

And I thought moving the Tapes and the MSL Library from one Server to another without the SQL Database is a kind of disaster recovery and likely an option to proof the concept of long term backups via tape. 😉

If the DPM Server is destroyed you will also lose the knowledge where and what files are located on the tapes and/or disks.
Keep in mind the DPM brain is stored in the SQL Database with reports, client server configurations and all this stuff.
Although you don’t have any of this you can simply get your data back with importing end recataloging the tapes.

What you need is another running DPM Server and, sure, a tape drive that’ll read your tapes. 😉

First step – you start inventorying the whole library or if you use a single drive with the inventory button on the left top side on the ribbons.
After and during the inventory you will see the tag/description (Imported) in front of you tapes.


But you also want to know what exactly is stored on the tape?
If you try to take a look and hit the “View tape contents” line in the middle …

… the following info box appears.

Sure you want to do that.
Note: Attentive observers would see there was a shorter way and hitting the line “Recataloging the tape” is quicker.

Anyway… the tapes will be “marked for recatalog and waiting for drive” now.

The tape drive is reading the tape and …

… after finishing you get more information. You see a date and what is stored (and maybe when it is expired or will be).
That should suffice for a first look.

Switch to the recovery and take a look. You’ll see “External DPM Tapes”.
You can browse through the backed up data and dig deeper if you need. 😉

If the tape is still in the library/drive DPM will read more data if needed and you’ll get a message.
“Please wait while DPM reads tapes …”

If the DPM could read enough data from the tapes you can look for whatever you’re looking for and recover your data.

Note: If you don’t need a deeper look and it’s not necessary to search for specific files you can simply recover the whole volumes/system the usual way. 😉


Data Protection Manager 2012 – DPM 2012

During the last days I took a deeper dive into DPM 2012 SP1 CTP2 and had some troubles with 2 Domain Controllers and “inconsistent replica data” sets.
It reminds me to an interesting blog post from the last year with different trouble shooting tips.

So here we go… 🙂