Hyper-V 2008 R2 cluster down

Hello,
We have a 3 node Hyper-V 2008 R2 failover cluster. Yesterday we had problems and all VM's on node 3 went down. At 17:00 the back-up starts of the VM's which are on CSV(with DPM 2010 and hardware providers for Dell) but then one nodes crashed. It look like
node 3 tries to take CSV04 ownership but node 1 doesn't accept that. See the cluster log below. Can someone tell me what triggered this? And how to fix this? Many thanks!
It start with a message that some Volume manager disk group and Geocluster disks are not found. This says nothing to me.
00000af0.00000c24::2014/02/23-17:00:27.738 WARN Resource type Volume Manager Disk Group not found.
00000af0.00000c24::2014/02/23-17:00:27.738 WARN Resource type GeoCluster Replicated Disk not found.
00000af0.000017fc::2014/02/23-17:00:35.117 INFO [RCM] rcm::RcmApi::MoveGroup: (6d07505c-cd56-4354-bb78-f0d452eb7350, 1)
00000af0.000017fc::2014/02/23-17:00:35.117 INFO [RCM] rcm::RcmGroup::Move: (6d07505c-cd56-4354-bb78-f0d452eb7350, 1)
00000af0.000017fc::2014/02/23-17:00:35.117 INFO [RCM] rcm::RcmGroup::Move: Bringing group '6d07505c-cd56-4354-bb78-f0d452eb7350' offline first...
00000af0.000017fc::2014/02/23-17:00:35.117 INFO [RCM] TransitionToState(CSV04) Online-->OfflineCallIssued.
00000af0.000017fc::2014/02/23-17:00:35.117 INFO [RCM] rcm::RcmGroup::UpdateStateIfChanged: (6d07505c-cd56-4354-bb78-f0d452eb7350, Online --> Pending)
00000af0.000017fc::2014/02/23-17:00:35.117 INFO [DCM] PreOffline for CSV resource CSV04
00000af0.000017fc::2014/02/23-17:00:35.117 INFO [DCM] Unmapping volumes for cfs resource CSV04
00000af0.00002330::2014/02/23-17:00:35.117 INFO [NM] Received request from client address 172.16.0.1.
00000af0.00000d04::2014/02/23-17:00:35.179 INFO [DCM] Processing message dcm/pause
00000af0.00000d04::2014/02/23-17:00:35.179 INFO [DCM] Push.AsyncPauseDisk for 7177671d-4b75-4c6e-ad3d-4ff3671ce779
00000af0.00001594::2014/02/23-17:00:35.179 INFO [DCM] SyncHandler for 7177671d-4b75-4c6e-ad3d-4ff3671ce779
00000af0.00001594::2014/02/23-17:00:35.179 INFO [DCM] enter_AllGood(7177671d-4b75-4c6e-ad3d-4ff3671ce779) P0..75 P0..150
00000af0.00001594::2014/02/23-17:00:35.179 INFO [DCM] MappingManager::PauseVolume 'Volume4'
00000af0.00001594::2014/02/23-17:00:35.179 INFO [DCM] Filter.ChangeState (ctx=2, state=CfsVolumeStatePaused)
00000af0.00002130::2014/02/23-17:00:35.273 INFO [NM] Received request from client address HV03.
00000af0.00002130::2014/02/23-17:00:35.288 ERR   [RCM] rcm::RcmResControl::DoResourceControl: ERROR_RESOURCE_NOT_ONLINE(5004)' because of 'PreprocessControl(16777765) failed for resource 'CSV04'.'
00000af0.00002130::2014/02/23-17:00:35.288 WARN [RCM] ResourceControl(STORAGE_GET_SHARED_VOLUME_INFO) to CSV04 returned 5004.
00000af0.00002130::2014/02/23-17:00:35.288 INFO [NM] Received request from client address HV03.
00000af0.00000c24::2014/02/23-17:00:35.320 ERR   [RCM] rcm::RcmResControl::DoResourceControl: ERROR_RESOURCE_NOT_ONLINE(5004)' because of 'PreprocessControl(16777765) failed for resource 'CSV04'.'
00000af0.00000c24::2014/02/23-17:00:35.320 WARN [RCM] ResourceControl(STORAGE_GET_SHARED_VOLUME_INFO) to CSV04 returned 5004.
00000f30.00001888::2014/02/23-17:00:35.663 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQ returned 21.'
00000af0.00002960::2014/02/23-17:00:35.663 WARN [RCM] Failed to load restype 'MSMQ': error 21.
00000af0.00002960::2014/02/23-17:00:35.663 WARN [RCM] rcm::RcmApi::ResTypeControl: ResType MSMQ's DLL is not present on this node. Attempting to find a good node...
00000f30.00001888::2014/02/23-17:00:35.663 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQ returned 21.'
00000af0.00000c24::2014/02/23-17:00:35.663 WARN [RCM] Failed to load restype 'MSMQ': error 21.
00000f30.00001888::2014/02/23-17:00:35.710 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQ returned 21.'
00000af0.00000c24::2014/02/23-17:00:35.710 WARN [RCM] Failed to load restype 'MSMQ': error 21.
00000f30.00001888::2014/02/23-17:00:35.912 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQTriggers returned 21.'
00000af0.00002960::2014/02/23-17:00:35.912 WARN [RCM] Failed to load restype 'MSMQTriggers': error 21.
00000af0.00002960::2014/02/23-17:00:35.912 WARN [RCM] rcm::RcmApi::ResTypeControl: ResType MSMQTriggers's DLL is not present on this node. Attempting to find a good node...
00000f30.00001888::2014/02/23-17:00:35.912 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQTriggers returned 21.'
00000af0.00000c24::2014/02/23-17:00:35.912 WARN [RCM] Failed to load restype 'MSMQTriggers': error 21.
00000f30.00001888::2014/02/23-17:00:35.912 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQTriggers returned 21.'
00000af0.00000c24::2014/02/23-17:00:35.912 WARN [RCM] Failed to load restype 'MSMQTriggers': error 21.
00000af0.00000c24::2014/02/23-17:00:35.928 WARN Resource type Volume Manager Disk Group not found.
00000af0.00000c24::2014/02/23-17:00:35.928 WARN Resource type GeoCluster Replicated Disk not found.
00000af0.00002960::2014/02/23-17:00:36.209 INFO [NM] Received request from client address HV03.
00000f30.000029d4::2014/02/23-17:00:36.599 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQ returned 21.'
00000af0.00000c24::2014/02/23-17:00:36.599 WARN [RCM] Failed to load restype 'MSMQ': error 21.
00000af0.00000c24::2014/02/23-17:00:36.599 WARN [RCM] rcm::RcmApi::ResTypeControl: ResType MSMQ's DLL is not present on this node. Attempting to find a good node...
00000f30.000029d4::2014/02/23-17:00:36.599 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQ returned 21.'
00000af0.00002960::2014/02/23-17:00:36.599 WARN [RCM] Failed to load restype 'MSMQ': error 21.
00000f30.000029d4::2014/02/23-17:00:36.599 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQTriggers returned 21.'
00000af0.00000c24::2014/02/23-17:00:36.599 WARN [RCM] Failed to load restype 'MSMQTriggers': error 21.
00000af0.00000c24::2014/02/23-17:00:36.599 WARN [RCM] rcm::RcmApi::ResTypeControl: ResType MSMQTriggers's DLL is not present on this node. Attempting to find a good node...
00000f30.000029d4::2014/02/23-17:00:36.599 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQTriggers returned 21.'
00000af0.00002960::2014/02/23-17:00:36.599 WARN [RCM] Failed to load restype 'MSMQTriggers': error 21.
00000f30.000029d4::2014/02/23-17:00:36.614 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQ returned 21.'
00000af0.00002960::2014/02/23-17:00:36.614 WARN [RCM] Failed to load restype 'MSMQ': error 21.
00000f30.000029d4::2014/02/23-17:00:36.630 ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)' because of 'Startup routine for ResType MSMQTriggers returned 21.'
00000af0.00002960::2014/02/23-17:00:36.630 WARN [RCM] Failed to load restype 'MSMQTriggers': error 21.
00000af0.00000c24::2014/02/23-17:00:36.911 ERR   [RCM] rcm::RcmResControl::DoResourceControl: ERROR_RESOURCE_NOT_ONLINE(5004)' because of 'PreprocessControl(16777765) failed for resource 'CSV04'.'
00000af0.00000c24::2014/02/23-17:00:36.911 WARN [RCM] ResourceControl(STORAGE_GET_SHARED_VOLUME_INFO) to CSV04 returned 5004.
00000af0.00002960::2014/02/23-17:00:36.989 ERR   [RCM] rcm::RcmResControl::DoResourceControl: ERROR_RESOURCE_NOT_ONLINE(5004)' because of 'PreprocessControl(16777765) failed for resource 'CSV04'.'
00000af0.00002960::2014/02/23-17:00:36.989 WARN [RCM] ResourceControl(STORAGE_GET_SHARED_VOLUME_INFO) to CSV04 returned 5004.
00000af0.000014c8::2014/02/23-17:00:39.251 INFO [DCM] filter.Event ->CfsVolumeStatePaused FromPause for ctx=2 status 00000000
00000af0.00001594::2014/02/23-17:00:39.251 INFO [DCM] volume paused 'Volume4'
00000af0.000017fc::2014/02/23-17:00:39.391 INFO [DCM] dcm/pause successfully completed on all nodes
00000af0.000017fc::2014/02/23-17:00:39.391 INFO [DCM] removing share 7177671d-4b75-4c6e-ad3d-4ff3671ce779-135266304$, status 0
00000af0.00002960::2014/02/23-17:00:39.391 INFO [NM] Received request from client address 172.16.0.1.
00000af0.000017fc::2014/02/23-17:00:39.438 INFO [DCM] ClearVolumeStates: resource 'CSV04' states <vector len='2'>
00000af0.000017fc::2014/02/23-17:00:39.438 INFO      <item>1</item>
00000af0.000017fc::2014/02/23-17:00:39.438 INFO      <item>135266304 0</item>
00000af0.000017fc::2014/02/23-17:00:39.438 INFO </vector>
00001680.000023b4::2014/02/23-17:00:39.438 INFO [RES] Physical Disk <CSV04>: Offline request.
00001680.00001e04::2014/02/23-17:00:39.438 INFO [RES] Physical Disk: DriveLetter mask: 0x0
00000af0.000017fc::2014/02/23-17:00:39.438 INFO [RCM] HandleMonitorReply: OFFLINERESOURCE for 'CSV04', gen(0) result 997.
00000af0.000017fc::2014/02/23-17:00:39.438 INFO [RCM] TransitionToState(CSV04) OfflineCallIssued-->OfflinePending.
00001680.00001e04::2014/02/23-17:00:39.454 INFO [RES] Physical Disk <CSV04>: HardDiskpCloseSVIHandles: Exit
00001680.00001e04::2014/02/23-17:00:39.454 INFO [RES] Physical Disk <CSV04>: VolumeIsNtfs: Volume
\\?\GLOBALROOT\Device\Harddisk2\Partition2\ has FS type NTFS
00001680.00001e04::2014/02/23-17:00:39.454 INFO [RES] Physical Disk <CSV04>: OfflineThread: partition 2 offset 135266304 is a CSV volume, skipping lock volume
00001680.00001e04::2014/02/23-17:00:40.421 INFO [RES] Physical Disk: ReleaseDisk: stop reserve succeeded on device 2 (sig ceba743a)
00001680.00001e04::2014/02/23-17:00:40.452 INFO [RHS] Resource CSV04 has come offline. RHS is about to report resource status to RCM.
00000af0.00002960::2014/02/23-17:00:40.452 INFO [RCM] HandleMonitorReply: OFFLINERESOURCE for 'CSV04', gen(0) result 0.
00000af0.00002960::2014/02/23-17:00:40.452 INFO [RCM] TransitionToState(CSV04) OfflinePending-->OfflineSavingCheckpoints.
00000af0.00002960::2014/02/23-17:00:40.452 INFO [RCM] TransitionToState(CSV04) OfflineSavingCheckpoints-->Offline.
00000af0.00002960::2014/02/23-17:00:40.452 INFO [RCM] rcm::RcmGroup::UpdateStateIfChanged: (6d07505c-cd56-4354-bb78-f0d452eb7350, Pending --> Offline)
00000af0.00000c24::2014/02/23-17:00:40.452 INFO [RCM] rcm::RcmGum::GroupMoveOperation(6d07505c-cd56-4354-bb78-f0d452eb7350,1)
00000af0.000017fc::2014/02/23-17:00:40.452 WARN [RCM] rcm::RcmApi::ResourceControl: forwarded, no retry on error 5908
00000af0.000017fc::2014/02/23-17:00:40.452 WARN [RCM] ResourceControl(GET_CLASS_INFO) to CSV04 returned 5908.
00000af0.00002960::2014/02/23-17:00:40.452 WARN [RCM] rcm::RcmApi::GetResourceState: retrying: 6d07505c-cd56-4354-bb78-f0d452eb7350, 5908.
00000af0.000017fc::2014/02/23-17:00:40.452 ERR   [RCM] s_RcmRpcGetResourceState: ERROR_CLUSTER_GROUP_MOVING(5908)' because of ''CSV04' is owned by node 1, not 3.'

Hi,
Unfortunately, the available information is not enough to have a clear view of the occurred behavior, from the cluster perspective.
Network activity could be related to our scenario too, although it is difficult to identify the specific cause. Maybe you can try reconnect the node 3 storage connective.Could
you offer us more information such as the failover cluster validation error, the failover cluster log original error log.
Regards.
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server?
Lastly I see people who use a third party app to defrag. What benefit is there to using a third party utility (defragger etc) versus the built in defrag within windows? Does it even matter?

Hi Guys,I wrote below script for creating new user and granting it read only access but I'm getting attached error.Please help...Powershell$HostList = Get-Content C:\Users\malvika\Desktop\Hostnames.txtforeach ($server in $HostList){ $HostDetail = $server.Split(',') $HostName = ($server -split ',')[0] $userid = ($server -split ',')[1] $password = ($server -split ',')[2] $VCimpl = Get-VIServer -Server $HostName -User $userid -Password $password [Reflection.Assembly]::LoadWithPartialName("vmware.vim") # The name of the role to be assigned $roleLabel="Read-Only" #craete user New-VMHostAccount -Id Test -Password U!er -Description "Test User" #The name of the principal (user or group) that the role is assigned to $principal="Test" # set to false if principal is a user , not a group $principalIsGroup = $false $propagateToSubEntities = $true ...

Unable to connect copied vhd files to VM Hyper-v high availability cluster.

Hi
I have my VMs VHD files stored on my SAN and I have a copied one of the LUNs containing a vhd file which I have then exported to the shared storage of the hyper-V cluster which is just like and other VHD. The problem comes when trying to connect this
copied vhd to the VM which still uses the original VHD . The system refuses reporting that it cannot add the same disk twice..
These are two different VHD files
I have: renamed the new file, changed the disk ID, changed the volume id and using vbox (because it was the only way I could find do it ) changed the uuid of the vhd file. But still no joy.
I can connect the volume to any other VM without any issues, but I need to be able to connect it to the same VM..
I'm not sure how Hyper-v is comparing the two VHD files but I need to know so I can I can connect the copy VHD without having to copy all its contents to a new VHD which is impractical..
Anyone got any ideas or a procedure??
windows 2008 R2 cluster with 3par SAN as storage.
Peter

Hi perter,
Please try to refer to the following items :
1. create a folder in the LUN , then copy the problematic VHD into it ,attach the copied VHD to original VM.
2. copy the problematic VHD file to another volume ,then attach it to original VM again .
Best Regards
Elton Ji
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Hyperv - 2008 R2 cluster migration

I want to migrate a Hyperv- 3 node cluster to another domain in a different forest. Is this possible, so help me with steps.

Hi,
the best way will be to rebuild the cluster at the new domain.
Here some informations_
Windows 2008 failover Cluster domain migration
http://social.technet.microsoft.com/forums/windowsserver/en-US/079cf6e9-9597-4265-b240-afa7972b2da7/windows-2008-failover-cluster-domain-migration
Moving a Hyper-V cluster to a new AD Domain
http://namitguy.blogspot.de/2012/03/moving-hyper-v-cluster-to-new-ad-domain.html
Hope that helps
Regards
Sebastian

Best Practice setting up NICs for Hyper V 2008 r2

I am looking at some suggestions for best practice for setting up a hyper V 2008 r2 at a remote location with 5 nics, one for managment vlan and other 4 on the data vlan. This server will host 2 virtual machines, one is a DC and the other
is a member local DHCP server. The server is setup now with one nic on the management Vlan and the other nic's set to get there ip from the local dhcp server on on the host. We have the virtual networks setup in Hyper V to
point to each of the nics using the "external connection". The virtual servers 'DHCP and AD" have there own ip set within them. Issues we are seeing, when the site looses external connections for a while they cannot get ip
addresses from the local dhcp server anymore.
1. NIC on management Vlan -- IP Static -- Physical host
2. NIC on the Data network Vlan -- DHCP linked as a connection "external" in Hyper V -- virtual server DHCP
3. NIC on the Data network Vlan -- DHCP linked as a connection "external" in Hyper V -- Virtual server domain controller
4. NIC on the Data network Vlan -- DHCP linked as a connection "external" in Hyper V -- extra
5. NIC on the Data network Vlan -- DHCP linked as a connection "external" in Hyper V -- extra
Thanks in advance

Looks like you may be over complicating things here. More and more of the recommendations from Microsoft at this point would be to create a Logical Switch and then layer on Logical Networks for your management layers, but here is what I would do for
you simple remote office.
Management NIC: Looks good (Teaming would be better, but only if you had 2 different switching to protect against link failures at the switch level. Doesn't seem relevant in this case however.
NIC for Data Network VLAN: I would use one NIC in your case if you can have the ability to Trunk multiple VLANs at the switch level to the NIC. That way you are setting the VLAN on the VMs NIC that you want to access and your
Virtual Switch configuration is very simple. On this virtual switch however, I would uncheck IPv4 and IPv6. There is no need to give this NIC an address as you are just passing traffic through them from the VMs that are marked with VLAN tags. Again,
if you have multiple physical switches in the building teaming could be an option, but probably adds more complexity than is necessary for a small office.
Even if you keep your Virtual Switches linked to separate NICs unchecking IPv4 and IPv6 makes sense.
Disable all the other NICs
Beyond that, check your routing. Can you ping between all hosts when there is not interruption? What DHCP server are they getting there addresses on normally? Where are your name resolution servers (DNS, WINS)?
No silver bullet here, but maybe a step in the right direction.
Rob McShinsky (VirtuallyAware.com)
VirtuallyAware - Experiences in a Virtual World (Microsoft MVP - Virtual Machine)

Task scheduler in windows 2008 R2 cluster.

We have clustered server and there's two nodes - Active(A1)/Active(A2).
Ordinary client can connect A1, but A1 is failed then connect A2 by windows 2008 R2 cluster.
We have a task scheduler exe module created by .net framework in each node.
When A1 server is operated, we wanna just A1 job scheduler active.
And A2 server is operated, just only A2 job scheduler acitve.
Can We contoller this situation in exe module or Failover Cluster Manager?
parky

If you upgrade to Win2012 or higher you can. Here's a blog on it:
http://blogs.msdn.com/b/clustering/archive/2012/05/31/10312527.aspx
Thanks!
Elden

Hyper-V 2012 R2 Cluster Creation Fails

I am trying to create a 2 Node Hyper-v 2012 R2 Cluster. The Cluster Validation passes with no errors or warnings but the the cluster creation fails.
The error is similar to
here .
In this case he solved it by joining the Nodes to a Windows 2012 Domain. We don't have that option in our environment.
In the System Logs Events 7024 The cluster service terminated... The cluster join operation failed, and 7031 Cluster Services Terminated unexpectedly.
Anyone have an idea?
Todd

Hi Todd,
For troubleshooting , please try to create a new OU then move cluster nodes computer to that new OU then block inheritance , restart the nodes .
After this try to use domain admin account logon the cluster nodes to build cluster again .
Best Regards,
Elton Ji
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] .

How to add a new instance to a 2 node SQL 2008 R2 Cluster under the same networkname

Hello All,
I'm fairly new to sql and have just deployed a new 2 node SQL 2008 R2 cluster.
During installation, I created a networkname SQLCLU and a named instance I01.
I now would like to add another Instance (I02) under the same networkname.
What is the proper procedure to do this?
I don't believe that I should do this using the action: "New SQL Server failover cluster" from the setup menu, but rather using the action "New Installation or add features to an existing installation"
With the second option, I'm however not sure how I should make this instance clustered..
Should I also execute the "New Installation or add features to an existing installation" action on the 2nd node in the cluster?
Many thanks for your advice!
Filip

You cannot use the same network name for 2 instances. You need to use a different network name for the second instance I02
A failover cluster instance contains:
A combination of one or more disks in a Microsoft Cluster Service (MSCS) cluster group, also known as a resource group. Each resource group can contain at most one instance of SQL Server.
A network name for the failover cluster instance.
One or more IP addresses assigned to the failover cluster instance.
One instance of SQL Server that includes SQL Server, SQL Server Agent, the Full-text Search (FTS) service, and Replication. You can install a failover cluster with SQL Server only, Analysis Services
only, or SQL Server and Analysis Services
http://msdn.microsoft.com/en-in/library/ms179410(v=sql.105).aspx

Failed to revert to VSS snapshot on the virtual hard disk '\\?\Volume{0f7b010b-f397-11e0-a76b-002655db9b10}\' of the virtual machine | Using HYPER-V 2008 R2

Hi,
I got this error on one of the VM (web server) backed up usng HYPER-V 2008 R2 and when I looked up, there is an microsoft hotfix for the same issue.
Microsoft KB Hotfix:
A backup of virtual machines fails when you use the Hyper-V VSS writer to back up virtual machines concurrently on a computer that is running Windows Server 2008
http://support.microsoft.com/kb/971394
But, the VM (web server) is running Windows 2008 R2 - SP1.
Hotfix says - To apply this hotfix, your computer must be running one of the following operating systems:
Windows Server 2008
Windows Server 2008 Service Pack 2 (SP2)
Does it mean it does not apply to Windows 2008 R2 | SP1 ?
When I checked the :
Swprv.dll version, it was higher than the one mentioned in the hotfix.
Thanks for any help.
-Ashwin

Hi Ashwin,
I am assuming that the VM(web server) is using SQL .
Please try to disable SQL Server VSS Writer in services.msc , then retry WSB again .
Hope this helps
Best Regards
Elton Ji
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Symantec Antivirus Best Practice for Hyper-v 2012 R2 Cluster

Hi Team ,
I am Working with Hyper-v 2012 R2 Cluster with 5 Node . All are working fine .
Now i am Planning to install Antivirus Symantec in to each node. Please let me know if there is any Best practice guide to install Symantec Antivirus for Hyper-v 2012 R2 Cluster node.
I am using full version of Windows 2012 R2 with hyper-v.
Thanks
Ravi
Ravi

I would also look strongly at no antivirus as well, but if you do, here are the recommended exclusions and possible issues with Anti-Virus to look out for.
Look for the Hyper-V section:
http://social.technet.microsoft.com/wiki/contents/articles/953.microsoft-anti-virus-exclusion-list.aspx
Big things to stay away from from a VM level too:
1. Do not have a set time when all VMs will kick off a scheduled full disk scan. This can create an I/O storm on your hosts as well as saturate the CPUs as well. Look for products or settings that allow for randomization of full disk scans on
the VMs or do not do full disk scans and only keep the real time scanners active on the VMs for incoming writes.
2. Watch for Antivirus products that update all the VMs at the same time. Again, sometimes you can randomize or exclude a scheduled full disk scan, but sometimes an automated update that kicks off say at 12am can then automatically kick off a
mini scan. This can also create disk I/O and CPU storms.
The problem that still exists with many Antivirus products today is that they try to scan as fast as they can and then get out of the way. This works ok for endpoint desktops or laptops, but when you have 50 or more VMs on a host all ramping up trying
to get done as quick as they can, then this can cause some issues.
Rob McShinsky (www.VirtuallyAware.com)
VirtuallyAware - Experiences in a Virtual World (Microsoft MVP - Virtual Machine)

Sql 2008 r2 cluster side by side with sql 2012 cluster on Windows 2008 R2

We have a SQL 2008R2 active/passive SQL cluster running on Windows 2008 R2 cluster.
I would like to add a SQL 2012 clustered instance to the same Winows 2008 R2 cluster.
Are there any issues involved having a SQL 2008 R2 clustered instance running side by side with a SQL 2012 instance in same Windows 2008 R2 cluster?
Are there any pitfalls/"gotchas" to watch for with SQL 2012 cluster install?
Thank you so much!

Hello,
Two instances, one SQL Server 2008 and the other SQL Server 2012, side-by-side, is fully supported.
I would like to recommend you to assign a different port (not port 1433) to the non-default instance
to avoid an IP address conflict between both instances.
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com

Mac Pro 2008 keeps shutting down and restarting

Just the other day after being shut down for a week my Mac Pro 2008 started shutting down and restarting on its own. Any idea where to begin troubleshooting?

Then they are probably completely clogged with deleted data.
http://en.wikipedia.org/wiki/TRIM
http://www.cindori.org/software/trimenabler/
the default version is FREE to download. Optional extra features are not required, but are available if you want them by paying US$10.

Hyper-V 2008 R2 cluster down

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