fredag 25 april 2014

Great features keep on coming, now support for backing up Hyper-V replica

Microsoft keeps on delivering great technologies to their customers, the last contribution is the support for backing up Hyper-V replicated servers.

When building a disaster recovery plan for a customer one important key component is the Hyper-V replica feature that lets you asynchronous replicate a Hyper-V machine between two hosting servers. The only previously supported scenario was to back up the virtual machines running at the primary site, this has now changed. On the 24th of April Microsoft announced that they now support backup of the replicated sever that is located at the replica site, this makes it easier to provide a decent and also a more optimal disaster recovery scenario or strategy to customers.  
Please note that backup of a Hyper-V virtual machine should only be considered as a disaster recovery strategy. From a DPM perspective you can recovery items that are defined as flat files from within the backup of the virtual machine, this does not apply to the applications (SQL, Exchange etc.) running inside the virtual machine. To summarize it, to be able to create a basic recover strategy you need to deploy a DPM agent to the virtual machine OS and perform what Microsoft call a guest-level backup providing a recovery scenario for the hosted application.

The Hyper-V replica feature has been a great contribution from Microsoft to their customers and with this announcement of support the efficiency of building a more optimal and strategically disaster recovery plan, which will directly map to the customer business continuity plan, means a great deal.

For more information regarding Hyper-V replica please have a look at this website:

For more information regarding the new support please read this article from Neela Syam Kolli that is the Product Group Manager for the DPM team:

torsdag 10 april 2014

Bringing back the support for Windows Server 2003

Releasing the R2 version of System Center Microsoft excluded the support for backing up Windows Server 2003. This raised a discussion in the community and among the MVP’s.
Microsoft realized the challenge this resulted in for many companies and decided to bring the support back with the UR2 that is due to the end of April.
I would like to see this action as a result of Microsoft really listening to the community and their customers. If you got any feedback regarding DPM please provide me with your thoughts.

fredag 28 mars 2014

Article on Technet, how to get started with DPM and Azure

A little while back I wrote an article for Microsoft that was published on Technet. The article covers how you get started using the Recovery Services in Microsoft Azure (name change!!) with focus on the backup vault and DPM integration.



fredag 21 mars 2014

New DPM book comming soon

Just would like to inform you that there will be a new DPM book soon published via Packt Publishing regarding DPM 2012 R2.

I’m writing the book right now and will try to provide good content to the reader not just regarding DPM as a product bit the whole picture of design, implementation etc.

Happy Friday!


fredag 7 mars 2014

1 – 1 Q&A @ TechEd NA

As I mentioned in my previous blog post ( I’m going to TechEd NA to deliver a session together with John Joyner. We will talk about how to deliver Backup As A Service (BaaS), Restore As A Service (RaaS) and Disaster Recovery As A Service (DRaaS) using SCDPM and the other members of the System Center 2012 R2 stack, Windows Server 2012 R2 and Azure.

If you are attending TechEd NA I would of course be very happy to see you in the audience but I would be even more than happy if I got the opportunity to listen to your challenges, thoughts or any idea you may have regarding DPM, SCOM or other members in the System Center family stack.

If you would like to have a 1 – 1 Q&A @ TechEd NA please send me an email ( with the subject TechEd2014.

Looking forward to listen to you.

fredag 28 februari 2014

Attending TechEd North America?

Are you attending TechEd? If you are I would love to see you in the audience for my session “How to deliver BaaS, RaaS and DRaaS in a modern datacenter using System Center 2012 R2” where me John Joyner and a PM member of DPM product group would like to explain how to use the combined power of the System Center stack, Windows Server and Azure to deliver BaaS (Backup as a Service), RaaS (Restore as a Service) and DRaaS (Disaster Recovery as a Service) with focus of SCDPM that are the key component for this service delivery.
The session code is DCIM-B421.
CU @ TechEd!!

tisdag 25 februari 2014


UR1 has been released and here is the link for the download.

With UR1 comes three fixed issues.

Issue 1
A 0x80070057 error occurs when a session is closed prematurely. This error is caused by a failure during a consistency check.

Issue 2

Lots of concurrent threads or calls to Microsoft SQL Server from the Data Protection Manager (DPM) console cause slow SQL Server performance. When this issue occurs, the DPM console runs out of connections to SQL Server and may hang or crash.

Issue 3

The DPM console crashes, and an error that resembles the following is logged:

torsdag 2 januari 2014


I’m very glad to announce that Microsoft has given me the MVP award for the fourth year in a row. It is a great honor and I’m moved.

I will try to work even harder for the community and looking forward to a great year helping you out =)

tisdag 5 november 2013

Nordic System Center Summit 2014

The biggest Nordic System Center event is about to launch and it would be a great pleasure to see you in the crowd. Listen to several MVP’s and also Travis Wright regarding the news and great features and functions for modern datacenter management using the System Center family.

The event will take place in both Sweden (Stockholm) and Norway (Oslo) the 4th and 5th of December.

For registration and more information please go to the following webpage:

fredag 1 november 2013

Tape Library Sharing

The Tape and Library Sharing feature is not a new feature within the System Center 2012 R2 release, the TLS feature has been around for a couple of DPM versions.

The TLS function is enabled when you designate a DPM server as the Library Server. The Library Server will control and manage the shared tape library and coordinate the DPM server that shares the library called Library Clients. For the DPM administrator to be able to start using the TLS feature the tape library must be presented using a fiber channel technology.

There are some prerequisites that you must consider before you start configuring the TLS feature:
  • Use only fiber channel as the primary communication media.
  • The physical tape library must be presented to all DPM server that should use it. 
  • For the server that should be Library Server the media changer / Tape Library AND the tape drives should be enabled in the device manager.
  • For the servers that should be Library Clients the media changer / Tape Library MUST be disabled in the device manager of the servers. The tape drives MUST be enabled in device manager.
  • Configure SQL Named Pipes Protocol on all SQL servers (will be covered in the blog post).
  • A service account for the TLS feature. In this blog post I will call the service account DPMTLS.
The following part in this blog post will cover how you configure the TLS feature so the DPM servers could share the tape library.
On all DPM Servers that will use TLS verify that the Medium Changer devices and Tape drives are present.

On the DPM server that will be library server (SRV1) the Media Changer devices and Tape drives should be enabled.
On the DPM servers that will be library client computers (SRV2) the Media Changer device should be disabled, keep the Tape drives enabled since the library client computers will need access to the tape drives.

Next step is to enable named pipes protocol for the SQL servers hosting the DPMDB for both client and library servers. Open your SQL Server Configuration Manager and expand the SQL Server Network Configuration and click on Protocols for MSDPM2012. Verify that Named Pipes are enabled on the right side of the MMC. If not enable Named Pipes by right-clicking and choose Enable. You need to restart the SQL server (MSDPM2012) service, it will also restart the SQL Agent (MSDPM2012) and DPM services.


Next step is to go to all your Client Library Computers and open an elevated command prompt. Open the following catalogue “C:\Program Files\Microsoft System Center 2012\DPM\DPM\Setup>” and execute the following command
AddLibraryServerForDpm.exe –DpmServerWithLibrary SRV1.contoto.local
You must always provide an FQDN for the DPM server name.

It is very important that you run this executable on all your client library computers. After you have executed the command on all your client library computers go the DPM server that will be the library server computer.
Open an elevated command prompt and go to the catalogue “C:\Program Files\Microsoft System Center 2012\DPM\DPM\Setup>” and execute the following command:
AddLibraryServerForDpm.exe – ShareLibraryWithDpm SRV2.contoso.local
Create a service account called DPMTLS that you make a member of the local administrator group of all your client library computers and the library server. When the DPMTLS account is a member of the local administrator group on all our involved DPM servers you configure the two SQL services:
  • SQL Server (MSDPM2012)
  • SQL Server Agent (MSDPM2012)
By default the two services are configured to use local accounts, you should change this for both services so they use the DPMTLS account.

This apply to both library server and client library computers.
When that is done you open an elevated command prompt on every client library computer and open the catalogue C:\Program Files\Microsoft System Center 2012\DPM\DPM\Setup and run the executable SetSharedDpmDatabase.exe with the following syntax:
SetSharedDpmDatabase -DatabaseName <SqlServer\Instance\DatabaseName> [-DoNotMoveData]
To find out the path for the SqlServer\Instance\DatabaseName go to the library server and open the DPM console. Click on the About DPM information button and you will see the path.

Go back now to the elevated command prompt on your client computers and type the following syntax:
SetSharedDpmDatabase –DatabaseName SRV1\MSDPM2012\DPMDB
Keep in mind that it will take some time for the TLS configuration is finished. You may see the SQL Server configuration Successful message for a long time before the Client SQL and Client DPM messages appears. DON’T CLOSE THE COMMAND PROMPT BEFORE THOSE THREE MESSAGES HAS BEEN PROMPTED
Go now to your Library Server and perform a Rescan and Refresh of your tape library. Go to Management in the console and click on Libraries. Right click on the library and choose first Rescan, wait for the process to finish. Right click again and choose Refresh. Repeat this on all your client library computers.

fredag 25 oktober 2013

PowerShell script for adding specific catalouge protection to a Protection Group

This blogpost is with regards to Mukul Singh Shekhawat and Balaji Hariharan

Lately I got a question from a friend of mine working for the PFE organization at Microsoft. The question was how to create a PowerShell script that will add an explicit catalogue present on a volume to a protection group.

Here is the script:
$dpmname = ""
$psname = ""
$dsname = "G:\"
$poname = "G:\ProtectableFolder"
$pgname = "MyCLIPG"
function CreatePG
                param($dpmname, $psname, $dsname, $poname, $pgname)
                write-host "Creating a D->D PG --> $pgname..."
                trap{"Error in execution... ";break}
                                Write-Host "Getting PS: $psname from DPM: $dpmname"
                                $ps = Get-ProductionServer -DPMServerName $dpmname | where { ($_.machinename,$ -contains $psname }
                                Write-Host "Running Inquiry on PS: $psname for datasource $dsname"
                                $ds = Get-Datasource -ProductionServer $ps -Inquire | where { ($_.logicalpath,$ -contains $dsname }
                                Write-Host "Getting Child-datasource $poname from datasource $dsname"
                                $po = Get-ChildDatasource -ChildDatasource $ds -Inquire | where { ($_.logicalpath,$ -contains $poname }
                                write-host "Create New PG ..."
                                $pg = New-ProtectionGroup -DPMServerName $dpmname -Name $pgname
                                write-host "Adding child datasource..."
                                Add-childDatasource -ProtectionGroup $pg -ChildDatasource $po
                                write-host "Setting Protection Type..."
                                Set-ProtectionType -ProtectionGroup $pg -ShortTerm disk
                                write-host "Setting Policy Objective...retention range - 10Days, synchronizationFrequency 15"
                                Set-PolicyObjective -ProtectionGroup $pg -RetentionRangeInDays 10 -SynchronizationFrequency 15
                                write-host "Setting Policy Schedules ..."
                                $ShadowCopysch = Get-PolicySchedule -ProtectionGroup $pg -ShortTerm| where { $_.JobType -eq "ShadowCopy" }
                                Set-PolicySchedule -ProtectionGroup $pg -Schedule $ShadowCopysch -DaysOfWeek mo -TimesOfDay 02:00
                                write-host "Setting Disk Allocation, with optimization (will take a few minutes to complete)"
                                Get-DatasourceDiskAllocation -Datasource $ds -Calculatesize
                                Set-DatasourceDiskAllocation -Datasource $ds -ProtectionGroup $pg
                                write-host "Setting Replica Creation Method ..."
                                Set-ReplicaCreationMethod -ProtectionGroup $pg -NOW
                                write-host "Commiting PG"
                                Set-protectiongroup $pg
function waitforIRtoComplete
                write-host "Wait for IR to complete"           
                $val = $waittime/30
                while($val -gt 0)
                                Write-host "Wait for IR to complete... $val"
                                start-sleep 30
Connect-DPMServer -DPMServerName $dpmname;
createPG $dpmname $psname $dsname $poname $pgname;
waitforIRtoComplete 120; 

tisdag 22 oktober 2013

System Center 2012 SP1 UR4 is released

The forth UR (UR4) for System Center is released today and it fixes a lot of challenges regarding SCOM, SCVMM, SCSM and APP Controller.

App Controller (KB2887822)

Issue 1
You cannot view or restart Windows Azure virtual machines that are in a Stopped (deallocated) state.
Issue 2
A6 and A7 Windows Azure Virtual machine sizes are displayed with a size of "Unknown."
Issue 3
Images for Windows Azure virtual machines are listed when the image is not available in the selected region.
Issue 4
You cannot specify an administrative user when a Windows Azure virtual machine is deployed.

Operations Manager (KB2880799)

Issue 1
When you try to run a Windows PowerShell script or module in an AllSigned environment, you receive the following error message:
The PowerShell script failed with below exception

System.Management.Automation.CmdletInvocationException: AuthorizationManager check failed.

Issue 2
Location points are not displayed on the GSM Map dashboard because of an SQL time-out error. When this problem occurs, the following events are logged in the Operations Manager log.

Event ID 33333
Event ID: 33333
Task Category: None
Source: DataAccessLayer
Data Access Layer rejected retry on SqlError:
Request: Composite_Select_Seed_90abbed0-9744-b360-2908-8bb6e00a0e63
Class: 16
Number: 8622
Message: Query processor could not produce a query plan because of the hints defined in this query. Resubmit the query without specifying any hints and without using SET FORCEPLAN.

Event ID 26319
Event ID: 26319
Task Category: None
Source: OpsMgr SDK Service
An exception was thrown while processing GetProjectionsByCriteria for session ID uuid:e3999b5c-870f-42cb-9e78-f7a0850a7c29;id=1175.Exception message: Query processor could not produce a query plan because of the hints defined in this query. Resubmit the query without specifying any hints and without using SET FORCEPLAN.Full Exception: Query processor could not produce a query plan because of the hints defined in this query. Resubmit the query without specifying any hints and without using SET FORCEPLAN.

Issue 3
An incorrect message description is generated when security event 5140 is monitored. For example, the message contains incorrect information for Source Address, Source Port, and Share Name.
Issue 4
An empty target group is created when endpoints are enumerated. Additionally, a message that resembles the following is logged in the event trace log (.etl):
[Microsoft.EnterpriseManagement.Modules.Apm.ServerDiscovery] [] [Verbose] :TemplateAgentDiscoveryProbeAction.ProcessDataItem{templateagentdiscoveryprobeaction_cs148}( 00000000038E0B6A )Application instances for the next application components were not found in the system:

Issue 5
By default, when a generic performance report is exported, the object information (such as server name, disk label, and so on) is collapsed, and the information is missing.
Issue 6
When you start the network node dashboard on a computer that's running a 32-bit edition of Windows 7 Service Pack 1, CPU usage is near 99 percent, and the console may stop responding.
Issue 7
A user role that is created by using Windows PowerShell on a non-United States locale-based system does not show the Display name and Description fields in the console.
Issue 8
When you create an override on a group or when you use a cmdletadd to a group, you receive the following message:
The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large number of tables or partitions. Please simplify the query. If you believe you have received this message in error, contact Customer Support Services for more information.

Issue 9
When you select objects on the dashboard, you receive the following error message:
Microsoft.EnterpriseManagement.Presentation.DataAccess.DataAccessDataNotFoundException: Exception reading objects ---> Microsoft.EnterpriseManagement.Common.UnknownDatabaseException: The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large number of tables or partitions.

Issue 10
When network discovery is run, duplicate entries for the same device may be added to the database. This problem occurs when a different device key is found for the same device.
Issue 11
Availability Reports may be displayed as blank because the vStateDailyFull aggregate is returned empty. This problem occurs when the time zone on the data warehouse server is set to UTC+0X:30.
Issue 12
The monitored health state of the System Center Advisor agent is always in a "Warning" state on the Advisor Health State dashboard.
Issue 13
Application Performance Monitoring (APM) is not functional when you upgrade to later versions of Operations Manager.
Issue 14
A website cannot be discovered or monitored on a system that's running Internet Information Services 8 if the HTTP binding is missing from the website configuration.

Operations Manager - UNIX and Linux Monitoring (part of KB2880799)

Issue 1
In rare cases, the Monitoringhost.exe process on the Management Server may crash with an access violation 0xc0000005 when log files are monitored on UNIX and Linux computers. When this crash occurs, it causes the managed UNIX or Linux computers to become unmonitored and in a "Critical" state.
Issue 2
When discovering a Linux computer, discovery fails during secure shell (SSH) discovery, or the operating system name and version are determined incorrectly. This issue can occur when multiple *-release files exist in the /etc directory, and one of the files is named os-release. Additionally, you receive an error message that resembles the following:
Failed during SSH discovery. Exit code: 2
Standard Output:
Standard Error: line 1: syntax error near unexpected token `('


Operations Manager - UNIX and Linux Monitoring (Management Pack update)

Issue 1
A Solaris computer that uses lots of monitored resources such as file systems, physical disks, or network adapters, may run out of file descriptors and cannot monitor the resources. This is the result of the default user limit on Solaris being too low to allocate sufficient file descriptors. The updated agent now overrides the default user limit with a user limit for the agent process of 1,024.

Additionally, the Operations Manager agent's log file (/var/opt/microsoft/scx/log/scx.log) contains errors or warnings that resemble the following:
error = 24 (Too many open files)

Issue 2
A monitored Solaris Zone configured for dynamic CPU allocation with Dynamic Resource Pools may log errors in the agent logs and return incorrect values for Processor performance counters.

This issue applies to any monitored Solaris Zones configured to use Dynamic Resource Pools and a "dedicated-cpu" configuration that involves a range of CPUs.
Issue 3
If Linux Container (cgroup) entries are in /etc/mtab directory, errors are logged when physical disk discovery is enabled, and some physical disks may not be discovered.

Additionally, errors that resemble the following may be logged in the Operations Manager agent's log file (/var/opt/microsoft/scx/log/scx.log):
Warning [scx.core.common.pal.system.disk.diskdepend:418:29352:139684846989056] Did not find key 'cgroup' in proc_disk_stats map, device name was 'cgroup'.

Issue 4
Physical disk configurations that cannot be monitored or failures in physical disk monitoring for UNIX and Linux computers, may cause failures in Logical Disk instances (File Systems) monitoring.
New support included in this update
  • Debian GNU/Linux 7
  • Java Enterprise Edition (JEE) Application servers:
    • IBM WebSphere 8.0
    • IBM Websphere 8.5
    • Oracle Weblogic 12c

Note The JEE application server additions are a separate Management Pack release. However, they depend on updates to the UNIX/Linux agent.

Service Manager (KB2887775)

Issue 1
You receive many 33610 events on various rules and subscriptions. Additionally, the size of the EntityChangeLog table grows because of stalled grooming.
Issue 2
When you accidentally double-click a parent link of an extended Incident class object instead of single-clicking it, the console crashes. If the Incident class object has not been extended, the console does not crash if you double-click the parent link.
Issue 3
Service requests may complete unexpectedly leaving any included activities in a Pending state.
Issue 4
When you have many manual activities assigned to you, the "My Activities" view in the Self-Service Portal may not display the whole list of activities. In some cases, depending on the number of activities that are assigned to you, the "My Activities" view may be displayed without information.
Issue 5
The Exchange Management Pack may always be in a state of "Pending Association" in the management pack sync Job in the console. Additionally, the status of the "Management Pack" node in the Data Warehouse space is "Failed" and may display an Event ID 33410 from the source deployment.
Issue 6
Service requests that are manually canceled during execution are marked incorrectly as "Completed" when they should be marked as "Canceled."
Issue 7
When a new SqlNotificationRequest instance is created, new rows are created in the sys.conversation_endpoints catalog view that has state="CO." Because the SqlNotificationRequest class does not provide any method to close the conversation accordingly, the sys.conversation_endpoints catalog view grows quickly to a very large number.
Issue 8
Service requests that are put on hold are marked incorrectly as "Completed."
Issue 9
Intermittently, file attachments are saved with zero (0) bytes in the database. The File Attachment record shows the correct data size together with file names and so on. But there is no actual data saved to the database.
Issue 10
Service Manager cannot capture the failed status on invoked runbooks. Runbook activities therefore remain "In Progress" even though the invoked runbooks have finished with a "Failed" status.
Issue 11
After Service Manager 2012 is upgraded to Service Pack 1, the Service Dependents view under Business Services is not displayed correctly. Additionally, creating or editing a new Business Service by adding one or more configuration items as "Service Dependents," the Business Service information is not saved.
Issue 12
Other activities in a Service Request may start to run even though the current activity has not finished.
Issue 13
When a reviewer is added to a Review Activity, workflow notifications may not always run. Additionally, you receive an Event ID 33880.
Issue 14
After a self-service portal is upgraded to Service Pack 1, simple lists do not function correctly. For example, a drop-down option that was selected in a simple list is not unselected when another option is selected.
Issue 15
This update enables "Run As" accounts for use with Exchange Connector.
Issue 16
When Service Manager runs a task that was created by using the PowerShell authoring tool, the workflow does not run and you receive the following error message:
System.Exception: Loading managed module type in assembly "Microsoft.EnterpriseManagement.Modules.PowerShell, Culture="",


Virtual Machine Manager (KB2887779, KB2888944, and KB2888946)

Issue 1
For scale-out file servers, if one of the file server nodes is offline, Virtual Machine Manager cannot discover or register the scale-out file shares.
Issue 2
Virtual Machine Manager cannot deploy port profiles if one of the port profile's maximum size is reached.
Issue 3
The Virtual Machine Manager Service crashes when there is an empty value for the vNICperf counter.
Issue 4
A "RunAs" account cannot be defined by using a service setting and cannot support the validation for network load balancing.
Issue 5
New virtual machines cannot be created from a library virtual machine if that library virtual machine has a snapshot on it.
Issue 6
In some cases, if a user imports a user interface add-in, the user might be unable to access the Virtual Machine Manager Server connection because the PowerShellContext property is null.
Issue 7
System Center 2012 Service Pack 1 Virtual Machine Manager cannot be uninstalled if any previous Update Rollup is applied to the system.
Issue 8
Virtual machine creation fails because the VMNetworkServiceSetting property cannot be set.
Issue 9
A new virtual machine deployment together with multiple pass-through disks may fail because Virtual Machine Manager cannot locate the boot or system volume during the installation of virtual guest services.
Issue 10
The Virtual Machine Manager Service may crash when it tries to discover a virtual machine on specific Storage Area Networks (SAN) storage.
Issue 11
In some cases, Virtual Machine Manager cannot update the VMWare host, the virtual machine or networking information.
Issue 12
Virtual Machine Manager tries to reset a virtual local area network (VLAN) ID when there is no change in the virtual machine network (VM network) or virtual machine subnet (VM subnet) of the network adapter.
Issue 13
When you migrate the storage of an online highly available virtual machine (HAVM), the cluster resource for the storage is not updated.
Issue 14
Virtual Machine Manager may report 0-percent CPU usage or 0 kilobytes (KB) available memory on the Hyper-V host.
Issue 15
Failed or canceled cross cluster migration does not clean the highly available virtual machine (HAVM) resource that is left in the target cluster.
Issue 16
The Virtual Machine Manager Service may crash because of Foreign Key violations in the tbl_ADHC_FibrePort table. This can be caused by a port that is deleted by Virtual Machine Manager before mapping is added.
Issue 17
Forecasting reports do not work if you use Microsoft SQL Server Analysis Services (SSAS) 2012.
Issue 18
A Server Message Block (SMB) protocol dialect shows 30,000 network-attached storage devices when Virtual Machine Manager is run on a German locale.
Issue 19
You try to create a virtual machine by using a virtual machine template. When you use some specific virtual hard disks (VHDs), the virtual machine creation may fail at the "Install VM component" step.
Issue 20
VMware templates imported from the Virtual Machine Manager 2012 Service Pack 1 console that are deleted from the Virtual Machine Manager console are put in the "Missing" state.
Issue 21
When a Windows Communication Foundation (WCF) channel is used after having aborted, the Virtual Machine Manager Service may ultimately crash.
Issue 22
You migrate a virtual machine with live migration. If you then migrate the virtual machine with stopped migration (for example, the source location does not exist in the target host), the migration fails. Additionally, you receive the following error message:
Failed to change smart paging store for virtual machine.

Issue 23
You change the Preferred Owners and the Possible Owners settings of a highly available virtual machine (HAVM). When you migrate the HAVM from a cluster to a stand-alone host, the Virtual Machine Manager Service may crash.
Issue 24
When you run a physical-to-virtual (P2V) conversion or a virtual to virtual conversion (V2V), the conversion wizard should use the virtual machine network (VM network) parameter in the network adapter cmdlet instead of the logical network parameter.
Issue 25
When unmasking a logical unit number (LUN) to the host, you may receive the following error message:

Issue 26
You receive an error when you add a storage pool to Virtual Machine Manager. This problem occurs if the logical unit number (LUN) of the storage pool is part of multiple storage pools.
Issue 27
After you install the Microsoft .NET Framework security update 2840632, some of user interface (UI) controls may not work.
Issue 28
Servicing services that were deployed before Update Rollup 3 for System Center 2012 Service Pack 1 was applied might fail after Update Rollup 3 is applied.