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System Center Data Protection Manager 2007: Tape problems

4:10 pm in Uncategorized by mikeresseler

Hey All,

During one of the implementations of DPM, one of my colleagues got into problems with the recognition of a tape library.  Although the tape library worked during the staging phase, when it got into production, it stopped working.  There were 20 tapes in the library, but DPM didn’t recognize them, and after you ran a fast recovery, you got the following error:

 

Connection to the DPM service has been lost.

DPM service could be running in recovery mode, which was initiated by the DpmSync tool. If DpmSync is not running and the DPM service is still in recovery mode, then run DpmSync again.

 

After having multiple steps with the Microsoft support team, they finally found a solution.  Because I thought the process of troubleshooting was interesting, I thought I posted it here.

1) Try the obvious

– Make sure that you have run the DPMDriveMappingTool.exe

2) If you want to log a call with MS Support:

– Run a DPM MPS report, the tool can be downloaded @ http://www.microsoft.com/downloads/details.aspx?FamilyID=14392186-6707-45a5-8987-29665abbd6f5&displaylang=en

 

Out of the reports that we have sent to them, they saw that “More than one mediapool reported for same media”.

Apparently, this can happen each time the DPM database has incorrect information about the tape drives, which can be caused when OEM drivers are updated when the vendorID’s and productID’s change.

Now to solve this one, you need to run a query that will reset the tables.  They gave us two procedures for that, depending on whether the tape library is shared or not.

Here they are:

 

PROCEDURE-1) STANDALONE (non-shared) TAPE LIBRARY CONFIGURATION REPAIR STEPS
===============================================================================
1) Close DPM UI
2) Backup the DPMDB by running dpmbackup -db from command prompt.
3) Open sql server management studio in context of DPMDB database instance. Make
sure you are admin on the machine
4) Select DPMDB. Right click -> New Query
5) Open the Query.txt file and copy paste its content in the query window
6) Execute the query.
7) Make sure query has succeeded.
8) Close SQL management studio
9) Open DPM UI
10) Go to library management tab
11) Do rescan
12) Let this rescan succeed. This rescan will detect libraries and will run Fast
inventory on the library.

PROCEDURE-2) SHARED LIBRARY CONFIGURATION REPAIR STEPS
===========================================================
(step i) On Library DPM server :
1) Close DPM UI
2) Backup the DPMDB by running dpmbackup -db from command prompt.
3) Open sql server management studio in context of DPMDB database instance. Make
sure you are admin on the machine
4) Select DPMDB. Right click -> New Query
5) Open the Query.txt file and copy paste its content in the query window
6) Execute the query.
7) Make sure query has succeeded.
8) Close SQL management studio
(step ii) On Client DPM server :
1) Close DPMUI
2) Backup the DPMDB by running dpmbackup -db from command prompt.
3) Open sql server management studio in context of DPMDB database instance. Make
sure you are admin on the machine
4) Select DPMDB. Right click -> New Query
5) Open Query.txt file and copy paste its content in the query window
6) Execute the query.
7) Make sure query has succeeded.
8) Close SQL management studio
9) Now run SetSharedDPMDatabase tool with parameter as the library server instance
name (if this does not succeed then reboot the machine and again retry running the
tool)
IE: SetSharedDPMdatabase -Instancename
<dpmservername-hosting-Global-SQL-Server>\MS$DPM2007$
(step iii) on Library DPM server
1) Open DPM UI and then on Client DPM Server.
2) Go to library management tab
3) Do rescan
4) Let this rescan succeed. This rescan will detect libraries and will run Fast
inventory on the library. Let this finish before going to next step
(step iv) on Client DPM server
1) Open DPM UI and then on Client DPM Server.
2) Go to library management tab
3) Do rescan

 

And finally, of course, you need the query.  Because it is way too long to upload the text here, I’ll ask the site owners to upload the query to the media library on scug.be

// Update, just found out that you can attach something to a post.  So here it is… query.txt :-)

Cheers,

Mike

System Center Data Protection Manager: Disaster Recovery

9:07 am in Uncategorized by mikeresseler

Hey All,

One of the most difficult things there is with backup solutions is Disaster Recovery.  Certainly when you want to do a bare-metal recovery of an old physical machine that has died on you.  Although you can have many possibilities to recover from such a failure, most of them will cause tricks, workarounds, hoping that you can find a server with the same (or almost the same) hardware configuration and lots of time.  Matthijs Vreeken (SCDPM.Blogspot.com) has written an interesting post about this  (http://scdpm.blogspot.com/2009/11/disaster-recover-using-p2v-and-dpm.html)

 

Here’s the theory.

You do a P2V of an existing physical server but leave it off afterwards (Assuming Hyper-V here, so that DPM can take a full backup of the VHD and config files).  Every day, you take a backup of the system state and daily data of the physical machine.

At the moment the physical server dies on you, you start the virtual server, restore data and you’re back up and running.

Pitfalls

He also mentions some possible issues that you can have during the start of the virtual machine. (Read at his post for more information)

 

Although this sounds great in theory (I was already on my way to my boss to discuss this ;-)) I still have a few questions about this.

 

1) What will happen if the physical server has a different patch level?  Will it be necessary to patch both servers @ the same time?

2) You need to keep the system state of the physical server in case you want to go back to the physical server.  But if you already have resetted the password for the computer account of the virtual machine, what will happen then?

3) How will an exchange or SQL server will handle this?  After all, this will be an online restore.

4) How will the DPM agent react on the virtual machine?  What are you going to do when the DPM agent has been upgraded in the meantime.

 

The idea sounds really great, and I don’t want to throw it away although I still have a few questions about it.  So if you have idea’s remarks or solutions for the questions, don’t hesitate to reply :-).  I’m going to continue to think about it because if we can find a rock-solid solution or process for this, it could become a very popular solution for a disaster recovery plan.  Share your ideas….

 

Cheers,

Mike

System Center Data Protection Manager 2007: Knowledgebase article for the new hotfix package is now available

4:17 pm in Uncategorized by mikeresseler

http://support.microsoft.com/default.aspx?scid=kb;EN-US;976542

Cheers,

Mike

System Center Data Protection Manager 2007: Recatalog an expired tape

4:14 pm in Uncategorized by mikeresseler

Hey All,

Ever needed to get data from a tape that is already expired?  In DPM, you won’t have the option anymore to recatalog the tape when it is expired.

Santhosh Sivarajan from Houston has found a simple workaround:

* Select the tape and mark the tape as free

* Select the tape again and unmark the tape as free

* Now you can choose Recatalog imported tape

The original post can be found here:

http://blogcastrepository.com/blogs/santhosh/archive/2009/10/29/recatalog-an-expired-tape.aspx

Cheers,

Mike

System Center Data Protection 2010: New cloud offering?

12:43 pm in Uncategorized by mikeresseler

Hey All,

Microsoft is really pushing the car for could offerings.  It has recently announced that it has established a partnership with i365, the software company of Seagate, to provide could-based data protection for DPM 2010. 

 

The offering would integrate i365’s EVault data protection software and cloud-connected storage infrastructure with DPM 2010.

The announcement can be found here:

http://www.i365.com/assets/downloads/press/pr_2009_11_9.html

More information is found here:

http://www.i365.com/solutions/microsoft/index.html

Cheers,

Mike

System Center Data Protection Manager 2007: New hotfix package

11:50 am in Uncategorized by mikeresseler

Dear All,

A new hotfix package has been released by Microsoft for DPM 2007.  It can be downloaded @

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=74ac7461-dbfe-4bc1-85a2-4d2948f30e42

The knowledgebase article is not yet available for the moment but I guess it will arrive soon :-)

Cheers,

Mike