New Hyper-V and SCVMM kb articles from Microsoft

Every day Microsoft is releasing knowledge base articles and hotfixes to explain, fix and improve the possible bugs present in their products. This post gives you an overview of all released knowledge base articles and hotfixes for the month(s): MAY & JUNE 2011.
The knowledge base articles and hotfixes in this post are related to Microsoft Windows Server 2008, Hyper-V and System Center Virtual Machine Manager 2008. Updates can be for RTM or R2 versions, with or without SP1.
System Center Virtual Machine Manager 2008 RTM/R2/SP1
KB2397711 Recommended hotfixes for System Center
Virtual Machine Manager 2008 R2
Description /
Summary
This article describes recommended updates to install to address issues
when you are managing hosts or are performing a physical-to-virtual (P2V)
conversion by using Microsoft System Center Virtual Machine Manager 2008 R2.
Applies to SCVMM 2008 R2
Workgroup Edition
KB2463008 How to determine if
a cluster is over-committed in System Center Virtual Machine Manager 2008
Description /
Summary
The cluster status displayed in the System Center Virtual Machine Manager
2008 Administrator’s Console may change from “OK” to
“over-committed” after a cluster refresh operation completes.
Applies to SCVMM 2008
SCVMM 2008 Workgroup Edition
SCVMM 2008 R2 Workgroup Edition
KB2562909 System Center
Virtual Machine Manager 2008 R2 setup fails with Error 2605
Description /
Summary
Microsoft System Center Virtual Machine Manager 2008 R2 (SCVMM 2008 R2)
setup may fail with the following error message during the Virtual Machine
Manager Server portion of setup:

Unable to connect to the VMM database because of a general database
failure. Ensure that the SQL Server is running and configured correctly, then
try the operation again.

ID: 2605. Details: SQL error code:
15247
Applies to SCVMM 2008
SCVMM 2008 R2 Workgroup Edition
KB977516 How to troubleshoot
the “Not Responding” host status in SCVMM 2008 and in SCVMM 2008 R2
Description /
Summary
This article discusses how to troubleshoot the “Not Responding”
host status that appears in the Microsoft System Center Virtual Machine
Manager (VMM) Administrator Console. The “Not Responding” host
status indicates that the VMM server cannot communicate with the host. If
this communication is interrupted, even intermittently, you can expect the
host status to change in the VMM Administrator Console.
Applies to SCVMM 2008
SCVMM 2008 R2 Workgroup Edition
Windows Server 2008 RTM/R2/SP1
KB951007 An event may be
logged after you restart Windows Server 2008: “Event ID: 5 Message: The
Virtual Storage Filter Driver is disabled through the registry. It is inactive for all disk drives”
Description /
Summary
After you restart Windows Server 2008, the following event may be logged
in the System log:

Log Name: System
Source: storflt
Event ID: 5
Level: Warning
Task Category: Non
Message: The Virtual Storage Filter Driver is disabled through the registry. It is inactive for all disk drives.
Applies to Windows Server 2008 Datacenter without Hyper-V

Windows Server 2008 Enterprise without Hyper-V
Windows Server 2008 Standard without Hyper-V
Windows Server 2008 Datacenter
Windows Server 2008 Enterprise
Windows Server 2008 Standard
Windows Web Server 2008
KB977516 A physical disk
resource remains in the “Online Pending” status, or the Chkdsk
utility automatically starts to run on a server that is running Windows
Server 2008
Description /
Summary
When you bring a physical disk resource online on a server that is
running Windows Server 2008, you may experience one of the following
symptoms.
Applies to Windows Server 2008 Datacenter without Hyper-V

Windows Server 2008 Enterprise without Hyper-V
Windows Server 2008 Standard without Hyper-V
Windows Server 2008 Datacenter
Windows Server 2008 Enterprise
Windows Server 2008 Standard
Windows Web Server 2008
KB2460786 Unable to Initialize
NICs on Windows Server 2008 R2 CORE edition
Description /
Summary
Microsoft has seen under certain conditions Windows 2008 R2 Core Server
may not be able to detect new network cards or is not using both interfaces
on a dual interface NIC on a machine with multiple NICs.

The problem has been found when a user replaces the motherboard and another
known issue seems when you add a dual port network card. It fails with an
“Error 31 – A device attached to the system is not functioning”
Applies to Windows Server 2008 R2 Datacenter

Windows Server 2008 R2 Enterprise
KB2545685 Recommended hotfixes and updates for
Windows Server 2008 R2 SP1 Failover Clusters
Description /
Summary
This article documents recommended hotfixes for Windows Server 2008 R2
SP1 Failover Clusters. Applying these fixes can improve the reliability of
your high avialability solution.

Note. We recommend you evaluate each fix to determine whether it
applies to your environment. If you determine that Failover Clusters in your
environment may be affected by the problem(s) that a fix addresses, install
the fix on each cluster node using the procedures described in KB 174799
(http://support.microsoft.com/kb/174799) .
Applies to Windows Server 2008 R2 Service Pack 1
KB2551270 ChkDsk may hang when
checking a GPT Disk inside a Hyper-V Virtual Machine
Description /
Summary
You are using Serial Attached SCSI (SAS) Storage to provide volumes for
Hyper-V Virtual Machines. When the volume has a size over 2 TB you are
required to create this as a GPT Disk. You attach this disk to a Hyper-V
Virtual Machine using the virtual SCSI Adapter.

You may experience a problem when the Volume is automatically checked during
start of the VM by chkdsk, or when you manually start a chkdsk against such a
volume. Chkdsk may hang in this scenario.
Applies to Windows Server 2008 Standard

Windows Server 2008 R2 Datacenter
Windows Server 2008 R2 Enterprise
Windows Server 2008 R2 Service Pack 1
KB2512715 Validate Operating
System Installation Option test may identify Windows Server 2008 R2 Server
Core installation type incorrectly in Windows 7 or in Windows Server 2008 R2
Description /
Summary
Consider the following scenario:

– You have some computers that are running Windows Server 2008 R2 Enterprise
Server Core or Windows Server 2008 R2 Datacenter Server Core.
– You have some other computers that are running Windows Server 2008 R2 and
that have the Hyper-V role installed.
– You install the Failover Clustering feature on these computers.
– You run the Validate Operating System Installation Option test on these
computers from a computer that is running Windows 7 or Windows Server 2008
R2.
In this scenario, you do not receive the following important message from the
Validate Operating System Installation Option test:
The operating system install type (Full/Core/Hyper-V Server) is not the same
for all of the servers.
Applies to Windows Server 2008 R2 Enterprise

Windows Server 2008 R2 Datacenter
Windows Server 2008 R2 for Itanium-Based Systems
Windows 7 Professional
Windows 7 Enterprise
Windows 7 Ultimate
KB2528357 HOTFIX: Nonpaged pool leak when you
disable and enable some storage controllers in Windows 7 or in Windows Server
2008 R2
Description /
Summary
Consider the following scenario:

– You have a computer that is running Windows 7 or Windows Server 2008 R2.
– You install a storage controller that uses the Storport.sys driver on the
computer.
For example, you install the Hitachi PCI Fibre Channel adapter or the QLogic
Fibre Channel adapter on the computer.
You disable and then enable the storage controller in Device Manager
frequently.
In this scenario, nonpaged pool usage increases when you disable and enable
the storage controller. If you trace the nonpaged pool usage or debug the
computer, the trace or debug information indicates that the nonpaged pool usage
that have the following tags keeps increasing:
– PlRB
– Dict
– RaRm
– RaDS
When the nonpaged pool memory is exhausted, the server may stop responding,
crash, or encounter function failure.
Applies to Windows 7 Professional

Windows 7 Enterprise
Windows 7 Ultimate
Windows Server 2008 R2 Standard
Windows Server 2008 R2 Enterprise
Windows Server 2008 R2 Datacenter
Windows Server 2008 R2 Foundation
Windows Server 2008 R2 for Itanium-Based Systems
KB2413735 After a new Hyper-V VMMS
certificate is generated, there are mouse and screen resolution issues when
managing a virtual machine using the Hyper-V Manager Console
Description /
Summary
On Windows Server 2008 or Windows Server 2008 R2, you may experience one
of the following symptoms when you connect to a Hyper-V virtual machine using
the Hyper-V Manager console or the System Center Virtual Machine Manager
Administrator Console:

– The mouse cursor is frozen or has disappeared
– The screen resolution has reverted to the default size
If you connect to the virtual machine using a Remote Desktop Connection
(RDP), the symptoms listed above are not exhibited.
Applies to Windows Server 2008 Datacenter

Windows Server 2008 Enterprise
Windows Server 2008 Standard
Windows Server 2008 R2 Datacenter
Windows Server 2008 R2 Enterprise
Windows Server 2008 R2 Standard
Microsoft Hyper-V Server 2008
Microsoft Hyper-V Server 2008 R2
KB2550569 HOTFIX:
“0×20001” Stop error when you start a Linux VM in Windows Server
2008 R2 SP1
Description /
Summary
Consider the following scenario:

– You install the Hyper-V role on a computer that is running Windows Server
2008 R2 Service Pack 1 (SP1) and that has Intel Xeon processors.
– You create a virtual machine (VM) that is running version 5 or 6 of the Red
Hat Enterprise Linux (RHEL) operating system.
– You select the Migrate to a physical computer with a different processor
version check box under the Processor configuration for the VM.
– You start the VM.
In this scenario, the computer crashes. Additionally, you
receive a Stop error.
Applies to Windows Server 2008 R2 Service Pack 1, when used with:

Windows Server 2008 R2 Standard
Windows Server 2008 R2 Enterprise
Windows Server 2008 R2 Datacenter

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