If you a running a Windows 2012 failover cluster and you tried to access the resource by using a resource name from a Windows XP-based or Windows Server 2003 computer, you will receive the following error message:find the following issue:
is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. Logon Failure: The target account name is incorrect
This issue occurs because the rc4-hmac keys on the Domain Controller and the cluster side for the virtual computer object (VCO) are different. The ticket decryption fails when the ticket is encrypted by using the rc4-hmac encryption. Additionally, the cluster becomes unavailable for any computer that uses the rc4-hmac keys.
Note: This applies to Windows 8 and Windows 2012 Fail over cluster and as per Microsoft advise it can impact Hyper-V deployments where the CNO password gets out of sync and you can no longer do Live Migrations.
So this should be proactively deployed
The hotfix is available here: http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=2838043&kbln=en-us
Microsoft published an article that documents the hotfixes that are currently available for Windows Server 2012-based Failover Clusters.
Failover Clustering allows multiple servers to provide high availability of server roles. Failover Clustering is often used for File Services, Virtual Machines, Database Applications, and Mail Applications.
The recommended hotfixes and updates for Windows Server 2012-based Failover Clusters : http://support.microsoft.com/kb/2784261
Microsoft released an update to improve the cloud service provider in Windows 2012
Note : The KB2870270 roll-up hotfix replaces KB2848344. This hotfix contains the fix for Trim as well as ODX. It is no longer necessary to disable Trim or ODX with this fix applied
The following issues are also resolved with this update:
– An Windows 2012 Hyper-V Cluster that uses CSV is moved or is toggled between directed access and redirected access when the performance monitor is running. In this situation, the performance counters no longer function.
– An Windows 2012 Hyper-V Cluster and the Virtual Machines VHD files are stored on a scale-out file share and the server is under a heavy load. In this scenario, the server may crash, and you may receive a Stop error message that resembles: STOP: 0x000000C2 (parameter1, parameter2, parameter3, parameter4) – Notes: The parameters in the Stop error message vary, depending on the configuration of the computer and not all “Stop 0x000000C2” errors are caused by this issue.
– When you use the Windows thin provisioning feature on a Windows Server 2012-based computer, you experience the same I/O delays or I/O stalls that occur during the volume-unmounting process in NTF volumes.
Plus the issues that are described in the following Microsoft Knowledge Base (KB) articles are resolved:
Microsoft just released a critical fix for hyper cluster that have been backed up by System Center DPM
“Physical Disk resource move during the backup of a Cluster Shared Volume (CSV) may cause resource outage”.
If you have configured a Windows Server 2012-based Hyper-V failover cluster CSV and your backup software perform the backup by using snapshots and the Physical Disk resource is moved to another node in the cluster, the Physical Disk resource may fail to come online if the backup of the CSV is in progress. As a result, virtual machines that rely on the CSV may crash.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
More info :http://support.microsoft.com/kb/2869923
- Windows Server 2012 Datacenter
- Windows Server 2012 Essentials
- Windows Server 2012 Foundation
- Windows Server 2012 Standard
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How the Cloud is transforming the Datacentre?
You are invited to an exclusive Insight, Microsoft & Veeam VIP event to learn more about the benefits of Windows 2012 Hyper-V, System Center, as well the exclusive book launch of Alessandro Cardoso’s : System Center Virtual Machine Manager 2012 Cookbook.
Tuesday 16th July, 8:30am. Don’t miss out on this great opportunity to attend this event, Register today
Level 5, 4 Freshwater Place
Southbank VIC 3006
Envisioning Your Private Cloud: Participate in a scenario based discussion.
Make more of your existing investments. Learn how to:
- Take existing resources and skills to the private and public cloud
- Use a single toolset to manage traditional and cloud environments
- Use a common identity infrastructure to mitigate risk
- Use a common platform to maximise IT and developer efficiency
Embrace the right IT for your business
- Get maximum control with the private cloud
- Obtain maximum agility and scalability with the public cloud
- Get the best of both by extending private to public
Learn how to monitor your IT environment with System Center Monitor and the right Management Pack
New in Hyper-V Windows Server 2012 R2:
A new generation of Virtual Machine (Generation 2), which will provides the following new features
- Legacy free : IDE drives and legacy network adapter support has been removed
- UEFI based
- Many emulated devices removed
- Boots from virtual SCSI or synthetic network adapters (virtual hard drive,virtual DVD drive).
- UEFI Secure Boot (enabled by default). Secure Boot is a feature that helps prevent unauthorized firmware, operating systems, or UEFI drivers (also known as Option ROMs) from running at boot time. Generation 2 virtual machines can take advantage of Secure Boot
- PXE boot using a standard network adapter. In previous versions of Hyper-V if you wanted to perform a remote installation of the guest operating system via PXE boot, you were required to install a legacy network adapter for PXE boot in addition to the standard network adapter that you would use after the operating system was installed
- UEFI firmware support
- Supported guest operating systems:
- 64-bit versions of Windows 8 and Windows Server 2012
- 64-bit versions of Windows 8.1 and Windows Server 2012 R2
Important : Once a virtual machine has been created, you cannot change its generation. You can host VM’s of different generations type, side by side. For operating systems that are not supported by generation 2 virtual machines, they will need to be installed in a generation 1 virtual machine.
Virtual machine operating system boot time can be up to 20% faster with generation 2 virtual machines.
Installing the guest operating system can be up to 50% faster with generation 2 virtual machines
- Full remote desktop capabilities
- Shared clipboard
- Audio redirection
- Enhanced login
- Enabled even when the network is down
Integrated into Hyper-V Management experience