Disable Hyper V Integration Services for time sync or disable VMICTimeProvider on guest machines

March 14, 2013, 3:19 am

≫ Next: stream virtual computers for students

≪ Previous: Server 2012 Hyper V Cluster or Replication?

Hi,

pls tell me best practices for Time Synchronization on Hyper V for guest machines. (Guest machines DC is sync with external Time provider - 2008 R2, and the others guest machines are snyc with this DC)

Host machine is 2008.

I did disable WMICTime Synchronization on host machine through Registry

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\TimeProviders\VMICTimeProvider]
"Enabled"=dword:00000000

This machine is DC.

I plan to do the same on the others VM guest machines.

pls tell me your experiance.

thak you for your time,

Keli

keli

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stream virtual computers for students

March 15, 2013, 6:48 am

≫ Next: HyperV PVLAN question

≪ Previous: Disable Hyper V Integration Services for time sync or disable VMICTimeProvider on guest machines

Hello,

we need to know wich (server)software we need to be able to offer virtual desktops to our students.

We installed hyper V on a 2012 st server, but apparantly that is only fo running local virtual systems.

we would like to install virtual computers on a server that can be accesed/ran from the lan.

thanks for any info regarding this topic.

regards

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HyperV PVLAN question

March 14, 2013, 3:26 am

≫ Next: server 2012 hyper-v vSwitch performance is terrible

≪ Previous: stream virtual computers for students

Hi All,

Here is my question:

I configure PVLANs on VMs with powershell cmdlets Set-VMNetworkAdapterVlan, as per this posts (http://www.cdolar.com/2012/12/network-isolation-using-pvlans-in-hyperv-3-0/#more-45) or (http://hikmatkanaan.wordpress.com/2012/11/10/configuring-windows-2012-private-vlan-pvlan/).

I have a primary VLAN that is routable on the physical network.

I configure a VM with isolated VLAN.
I configure a VM with community VLAN.
I configure a VM with promiscuous VLAN.

All of the configuration works as expected inside HyperV. But I cant ping any of the external subnets (that are not in HyperV) from any of the VM machines that have PVLAN enabled except the VM with promiscuous mode.

Is this by design? Did I miss-configure something. I didnt see anywhere that I need to do any configuration the physical routers and switches for PVLAN to work with the external networks.

Thanks

Zarko

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server 2012 hyper-v vSwitch performance is terrible

November 19, 2012, 6:26 am

≫ Next: Hyper-v installation problem

≪ Previous: HyperV PVLAN question

Running an HP DL380 G5 single quad core with 8GB of ram.

OS is on RAID-1 146GB 10k rpm SAS

VM's boot from EqualLogic SAN on 24 900GB 10k rpm SAS via iSCSI at 1Gb/sec (as a test lab)

Host OS is Server 2012 with hyper-v role (all updates)

Client VM's are all server 2012

I have been running bandwidth tests between VM's on the same node and have noticed that no matter what I do I cannot get the vSwitch to push more than about 2.0Gb/sec between VM's. I am using iperf as a test to generate bandwidth.

I have tried between 2 VM's, I have tried 3 VM's pushing to 1 VM, I have tried 2 to 2, but no matter how I structure the tests the overall aggregate bandwidth between all the VM's never exceeds ~2Gb/sec over the vSwitch.

Suppoesdly the vSwitch is a virtual 10Gb/sec adapter so I'm wondering why I can only push 20% of that traffic. I'm using iperf because it doesn't require disk I/O to test bandwidth because I want to eliminate the client OS or the SAN as the bottleneck.

Can anyone provide help on getting more performance out of the vSwitch?

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Hyper-v installation problem

March 15, 2013, 6:06 am

≫ Next: v3- possible to connect private vSwitch on different hosts?

≪ Previous: server 2012 hyper-v vSwitch performance is terrible

Hi,

I have installed Windows 2008 R2 SP1 x64. When I try t instal hyper-v role, i have problem... Installation start ok, until first restart. After first restart, windows can't start (on booting freezes and nothing happens)... then I start in safe mode, and when I open hyper-v mannager looks fine... but I can't start in normal mode, when I start in last known good configuration, hyper-v manager looks like not installed completly: no hyper-v services in services manager, and in server managment I see some errors...

I installed hyper-v role on this laptop before upgrading from 4-8GB ram, and everything was ok, only vm's worked slow, but was fine with hper-v manager... I realy don't know what is problem...

I can sent print screen if someone need it...

Someone to have idea?

thanks,

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v3- possible to connect private vSwitch on different hosts?

March 15, 2013, 7:29 am

≫ Next: Windows Server 2012 - Can occasionally not access second virtual hard drive inside a VM

≪ Previous: Hyper-v installation problem

Hello,

is it possible to connect private vSwitch on different Hosts so that the VMs can talk togehter without using real VLAN from the real switch?

Any suggestions how to connect VMs in isolated Networks (private vSwitch)?

THX

Grüße/Regards, Jens Klein

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Windows Server 2012 - Can occasionally not access second virtual hard drive inside a VM

October 20, 2012, 1:57 pm

≫ Next: Cannot repair hyper-v cluster on Server 2012.

≪ Previous: v3- possible to connect private vSwitch on different hosts?

I run Windows Server 2012 RTM Hyper-V and I can occasionally not access the second virtual hard drive (dynamically expanding VHDX) attached to the VM through the virtual SCSI controller. I can however access the first hard drive that is connected with the virtual IDE controller.

I get the following warning in the event log under “Administrative Events” every 30 seconds when this happens:

Log Name: System
Source: Storvsc
ID: Storvsc
Message: “Reset to device, \Device\RaidPort0, was issued.”

I get this error once or twice a week and it has caused serious problems since one of the virtual servers that have this problem is a fileserver and the second hard drive contains all the data.

The only quick solution to the problem that I have found is to force the virtual machine to stop using the “Turn Off” feature since a normal shut down does not work (stops at shutting down the event log or similar) and then start the virtual machine again.

You can also wait for about 30 minutes or longer until the disk for some reason becomes accessible again by itself.

My research into this problem shows that:

Only 2 of the 10 VMs running Windows Server 2012 RTM that I have, have this problem.
Both these VMs have a second virtual hard drive (dynamically expanding VHDX) that cannot be accessed for 30 minutes or longer.
Check Disk of the virtual hard drive shows no errors.
The second hard drive is attached to the virtual SCSI controller.
I can find no problems at all with the physical storage on the (not related) 4 hosts that I have. The problem exists only in the VMs.

I have now attached the second virtual hard drive to the virtual IDE controller to see if this permanently fixes this problem (i.e. does not happen for at least a week).

Is there something wrong with the virtual SCSI controller or the virtual SCSI device driver that comes with Windows Server 2012 RTM? Does anyone else have this problem?

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Cannot repair hyper-v cluster on Server 2012.

March 15, 2013, 9:32 am

≫ Next: What are the requirements to connect a USB webcam to a Win7 guest on a free Hyper-V 2012 ?

≪ Previous: Windows Server 2012 - Can occasionally not access second virtual hard drive inside a VM

I am trying to repair a hyper-v v cluster on server 2012 and the option is greyed out. I am having problems adding the cluster to scvmm. Getting errors about the cluster name is not registered properly in ADDS. So was advised to try and repair the cluster but I cannot find out what is wrong to enable the repair function.

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What are the requirements to connect a USB webcam to a Win7 guest on a free Hyper-V 2012 ?

March 15, 2013, 8:14 am

≫ Next: Replica and Exchange 2010 explaination

≪ Previous: Cannot repair hyper-v cluster on Server 2012.

Hi,

I would like to connect a USB webcam (connected directly to the server) to a guest running Windows 7 on a free 2012 hypervisor.

What are the hardware and software requirements to accomplish that?

Many thanks!

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Replica and Exchange 2010 explaination

March 8, 2013, 3:31 pm

≫ Next: Add a new (third) node to cluster with CSV

≪ Previous: What are the requirements to connect a USB webcam to a Win7 guest on a free Hyper-V 2012 ?

Hello,

I've read a bunch about this, but perhaps not the right material. I have one stand alone 2010 Exchange server, can I use Server 2012 Replicas to provide disaster recovery for the Exchange server, in terms of if the host fails I can turn on the replica and be ok? - and maybe just be 5 minutes behind? Has anyone tested this? I want to be sure should something happened to the non clustered host, that I can at least go to the Exchange Replica.

Thanks,

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Add a new (third) node to cluster with CSV

September 30, 2011, 9:30 am

≫ Next: Disk performance of cluster shared volumes VS iSCSI boot

≪ Previous: Replica and Exchange 2010 explaination

Good day!

Where is a cluster Hyper-V R2 SP1 with 2 nodes (CSV enabled) which connected to SAN (EMC) by fiber-channel (QLogic HBA -> Brocade SW -> SAN). EMC PowerPath installed on all nodes. A quorum is enabled and configured. All tests are passed without any errors.

If I add a new third node and reconfigure quorum to non-parity configuration the problem with attached LUNs starts! Third node can't initialize them. Error like: "The requested resource is busy". I tried everything but only two things helped:

CLUSTER NODE /CLEARPR:#disk_number. Restrictions reseted and drive was initialized. But errors appears on other nodes because they missed control on drives.
Delete CSV volumes by Cluster MMC and then delete disk from storage. Initialize disks and get back deleted configuration. But this is not failover cluster.

Help me with the problem please. How do I need do this procedure right for Fiber-Channel and Hyper-V Cluster?

I tried KB2531907 but no avail.

P.P.S.

Maybe I don't fully understand the essence of entering a new node to an existing cluster: is it possible to connect a new node on "live"? I.e. no pre-free nodes which combined by a single operation in a cluster, but insert a new node without shutting down the already clustered nodes or without removing CSV. If this is possible, how?

Thanks!

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Disk performance of cluster shared volumes VS iSCSI boot

March 15, 2013, 9:58 pm

≫ Next: Server 2012 Hyper-V hypervisor not running on compatible CPU

≪ Previous: Add a new (third) node to cluster with CSV

My first question. It seems that coping files to a shared cluster volume on a node that does NOT own the cluster share is slower. I assume this is because the host has to go to the node that owns it. True?

I have been toying with the thought of iSCSI boot for the VMs. Refer to this blog: http://blogs.technet.com/b/storageserver/archive/2011/05/04/diskless-servers-can-boot-and-run-from-the-microsoft-iscsi-software-target-using-a-regular-network-card.aspx

I was thinking of putting gpxe in a vhd file to boot from instead of a flash drive or DVD. And leave the rest the same.

Is gPXE reliable? Would there be a performance increase over CSVs?

Thanks for any input.

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Server 2012 Hyper-V hypervisor not running on compatible CPU

March 12, 2013, 7:43 pm

≫ Next: Hyper-V 2012 remote management works on same subnet but not on another

≪ Previous: Disk performance of cluster shared volumes VS iSCSI boot

Hi,

I'm having this issue with my AMD Turion X2 laptop (Hypervisor launch failed; the hypervisor boot loader's internal logic failed (BalStatus 0x19, sub-status 0x2))...but as you can see coreinfo is giving me SVM supported...it's just that the hypervisor won't run no matter what I try?

Any chance I could see why isn't it running...the only thing I suspect could be wrong is video drivers (but I thought you only need those for RemoteFX - which I don't really need - I just want to run WP8 emulator)...but I could only find some legacy Radeon 3200 drivers probably without Hyper-V optimization in them (are there any other drivers)?

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Hyper-V 2012 remote management works on same subnet but not on another

March 15, 2013, 1:43 pm

≫ Next: CSV 2008R2 Quorum Disk Move in a live environment

≪ Previous: Server 2012 Hyper-V hypervisor not running on compatible CPU

Hello All!

I realize there is a ton of other discussions on very similar issues but I've tried all the various suggestions with no success and I think this problem is unique (but probably applicable to many other people experiencing similar errors).

Environment:

Machine A: Client for remote management - running Server 2012
Machine B: Hyper-V Server 2012

- No domain - workgroup mode
- Firewall is disabled on both for troubleshooting purposes
- Setup the same Administrator user/password on both machines as well as another identical Admin user to test with
- allowed Anonymous Remote Access in DCOMCNFG
- hosts files are edited to add server/client host names
- set VDS service to start / automatic start

Problem:

When installing Machine B (Hyper-V Server) with client Machine A directly plugged into the same LAN and a static IP on the same subnet, all remote management works fine. I am able to use Hyper-V Manager fully as well as Server Manager, Computer Manager, Powershell Remoting all successfully.

When I move Machine A (client) to a remote ISP and connected to our colo facility via VPN (has an IP on another subnet), and connect to the server in Hyper-V Manager, I get error "RPC server unavailable. Unable to establish communication between 'server' and 'client'." Note that I can edit Hyper-V Settings, Edit and Inspect Disks, etc. all from within Hyper-V Manager and all other types of management work (Server Manager, Computer Manager, mmc, Powershell Remoting) with the exception of connecting to the Disk Management service in Computer Manager which also throws an "RPC server unavailable" error.

The VPN is a hardware-based IPSEC tunnel from a Trendnet Router ISP-side (Machine A) to a Cisco Pix firewall colo-side (Machine B). There are no Pix rules restricting the data flow regarding the VPN tunnel.

I can ping in both directions successfully, and a tracert completes with a single hop both ways.

I noticed a Firewall rule for Windows Remote Management (HTTP-in) on public profile was restricted to local subnet only, so I added my VPN subnet as well. But this should not affect my outcome as all firewalls are disabled.

So, it seems this is directly related to being on a different subnet as everything works when on the same subnet. Any insight into this would be greatly appreciated. Thanks and have a great weekend!

Cheers, Rich

rktect

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CSV 2008R2 Quorum Disk Move in a live environment

March 15, 2013, 9:24 am

≫ Next: Hyper-V on Hyper-V

≪ Previous: Hyper-V 2012 remote management works on same subnet but not on another

I have a 2 node HyperV CSV Cluster. I need to evict Node2 for the cluster so what i did:

1. Live migrated all VM's from Node2 to Node1

2. Made sure all CSV are owned by Node1

3. Went into SCVMM 2012 and Started Maintenance mode on Node2

Here is my issue:

When i go to storage i see my Quorum CURRENT OWNER is node2 (which is in maintenance mode).

So can i just evict node2 and the Quorum will migrate automatically to Node1 without any downtime to the cluster? (it is set that the potential owners of this drive are both server)

Need help an get the cluster down but need to do this during the day.

Tommy

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Hyper-V on Hyper-V

March 8, 2013, 5:38 pm

≫ Next: Hyper-V 2012 replication

≪ Previous: CSV 2008R2 Quorum Disk Move in a live environment

I have created several volumes on our EqualLogic PS6010X and I have two Hyper-V hosts (host1 and host2) using Dell Power Edge R710 servers with Windows Server 2008 R2.

First, I connected those volumes using iSCSI Initiator on Host1 and were able to make them online on Host1 Disk Management on Windows Server 2008 R2 as Disk 1, Disk 2, Disk 3, etc.

Then, I connected those volumes using iSCSI Initiator on host2 after giving iqn access control for host2 on each volumes.

All working good, however when I checked the Disk Management on host2, those volumes were visibled, but the disks were not in the same order as on host1. I just wonder if this will become a problem, since I plan to continue using Failover Cluster on those hosts.

If not ok, how to make the volumes the same order on host1 and host2 Disk Management?

I have tried several ways to fix the problem without success, such as by removing and recreating those volumes and I was able to make those volumes (disks) in the same order on host1 and host2 by selecting and connecting the volumes on host2 iSCSI Initiator one by one in the right order. But after I rebooted host2, it automatically changed the disk order in host2 Disk Management which was not the same order as in host1 again.

Your assistance in this matter is much appreciated.

Thanks

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Hyper-V 2012 replication

January 7, 2013, 5:08 am

≫ Next: Network printer

≪ Previous: Hyper-V on Hyper-V

Hi,

I have 2 test servers which are in the same domain. I want to use kerberos authentication but I am getting same error all the time.

The error is: Hyper-v failed to authenticate using kerberos authentication. The specified target is unknown or unreachable (0x80090303). Hyper-v failed to authenticate the replica server using kerberos.I can ping both name and ip. Dont know why is it unreachable.

This is strange because they are in the same domain. When I test this first time i didnt have problems with it.

Hope that someone can help with this.

My DC is Small Business server and maybe is because of that or.

Best regards/kaktak

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Network printer

March 16, 2013, 3:50 pm

≫ Next: Guest VM failover cluster on Hyper-V 2012 Cluster does not work across hosts

≪ Previous: Hyper-V 2012 replication

I can not print to my network Dell 2155cn printer either by USB or network.

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Guest VM failover cluster on Hyper-V 2012 Cluster does not work across hosts

July 14, 2012, 10:43 am

≫ Next: instaling vm's on windows server 2012

≪ Previous: Network printer

Hi all,

We are evaluating Hyper-V on Windows Server 2012, and I have bumped in to this problem:
I have a Exchange 2010SP2 DAG installed on 2 vms in our Hyper-V cluster (a DAG forms a failover cluster, but does not use any shared storage). As long as my vms are on the same host, all is good. However, if I live migrate or shutdown-->move-->start one of the guest nodes on another pysical host, it loses connectivity with the cluster. "regular" network is fine across hosts, and I can ping/browse one guest node from the other. I have tried looking for guidance for Exchange on Hyper-V clusters but have not been able to find anything.

According to the Exchange documentation this configuration is supported, so I guess I'm asking for any tips and pointers on where to troubleshoot this.

regards,

Trond

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