Posts Tagged ‘Cluser’

AlwaysOn Protection With System Center Data Protection Manager 2012 R2

Sunday, April 27th, 2014

 

I have been waiting for months to write this blog about how to protect AlwaysOn with DPM , the reason for the delay that DPM 2012 R2 before RU2 wasn’t supporting AlwaysOn  with Cluster. 

for Enterprises looking for true disaster Recovery and avoid single point of failure,  AlwaysOn can be setup using SQL Cluster Instance with a stand alone SQL server Instance.meaning the primary replica is hosted on a SQL Cluster instance and Secondary replica is hosted on SQL Instance Standalone. the reason for that is to avoid the single point of failure such as the SAN

As I mentioned earlier , before DPM rollup Update 2 for System center , DPM didn’t support Protecting AlwaysOn with Cluster Setup.

First step:  Install DPM Client to your WFC nodes , make sure to patch your DPM server with the latest RU2

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Second Step: Create a Protection Group to protect databases on Clustered AlwaysOn .

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DPM Server with Hyper-V role Hang at logon

Sunday, October 28th, 2012

SYMPTOMS

During the first logon after a reboot, the DPM server will hang most commonly at the “Welcome” screen (Sometimes if you logon immediately after being presented with the Ctrl-Alt-Del, you will be able to get to the desktop before if freezes).  This will happen if connecting locally or through RDP.  While in this hung state, you can ping the server and connect to a UNC path i.e. \\DPMServer\D$, but you will be unable to remotely manage the server i.e. After a period of time,the server will become fully responsive again.  Subsequent logons without rebooting the system will not reproduce the logon hang.

The issue is cause by DPM mounts and dismounts a VHD. 

RESOLUTION

  • At a command prompt, type the following command, and then press ENTER: devnodeclean /r
  • Schedule the devnodeclean /r command to run one time every week.

if you don’t know how to get devnodeclen , I recommend reading the following

http://bytesolutions.com/Support/Knowledgebase/KB_Viewer/ArticleId/35/DevNodeClean-Download-remove-phantom-storage-device-nodes.aspx

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