I am testing HyperV migration between Server 2012 servers. I've set the migration to use Kerberos, and I have added the cifs and Microsoft Virtual System Migration delegation from Server1 to Server2. (And in reverse for migrations back if needed)

When I attempt to migrate from Server1 to Server2 I get the following error:

The eventlog on the server I am Migrating From has the following error:

I have verified that the SPNs for 'HOST/Server2' and 'Microsoft System Virtual Migration Service/Server2' exist in the attribute editor for the server I am migrating to. I have also verified that the firewall is off on both servers.

Help!!

Missing Service Principal Name WSMAN?  Both the netbios and fqdn versions of WSMAN are missing on the hyper-v host.  All other SPN's are available for this hyper-v host object in ADSI.

Do I need to worry for a hyper-v host which is running some mobile messaging VM's.

We have removed this hyper-v host from the domain and readded it.   I have also done an addportrange.vbs and this runs--error  Line 43 character 1 shows error that that that there are no more ports are available for endpoint mapper. (code: 8000706D9  source: null)   I believe this error means that there are no more ports to add for this mapping-all available ports are available.   The "self" entry for the server object has the correct "write" permission to create SPN's.  In fact all otherSPN's are in AD except WSMAN. This server is also patched with all available windows updates.  Other hyper-v host added to the domain have all SPN's visible in ADSI.  The below event occurs whenever the hyper-v host is rebooted.

dsk

Hey everyone,

Still pretty green to Hyper-V 2012, and have a few questions I'm hoping someone can help me with;

1) What is the recommended disk space requirement for Hyper-V 2012 itself? I'm looking to get a Sata DOM which are expensive and generally very small on the capacity side of things. Would 4GB be enough, or should I get 8GB? The cost difference between 4Gb and 8Gb is significant, so would appreciate any Microsoft links showing disk space recommendations for Hyper-V 2012.

2) I plan on having all VM system virtual disks located on SSD. For backup I'm planning on taking a Volume Snapshot of the partition my VM's are located on and storing it on a regular spinning media Sata HDD. Just wondering, will the use of this regular Sata HDD slow performance of the VM's in anyway.

3) I seem to remember a paper from VMware showing that for their products the performance difference between fixed and dynamically assigned disk space was very narrow these days. Is there any significant performance benefit to using a fixed disk over dynamic in Hyper-V 2012?

Migrating servers from 2008r2 Hyper-v cluster to new 2012 Hyper-v Cluster.  All 140 servers have migrated with no issues until my last one.

It is our secondary domain controller.  It is running 2008r2 fully patched.  I have copied the vhd to the new cluster storage and created the vm profile in 2012 failover cluster manager.

Server boots and I have installed newest integration drivers.  The network connection goes to Red X.  In device manager I have an exclamation mark on the network adapter. Error 31 can't load drivers.

If I shut it down and boot it back up on our 2008r2 Hyper-v cluster, networking works as expected.

Are there some standalone drivers that I can manually install on the vm or another workaround?

I have tried registry hacks in HKLM\SYSTEM\CurrentControlSet\Control\Network  delete theConfig (REG_Binary) key, also tried removing adapter and reinserting, removing adapter and adding legacy adapter. Same results.  I am out of ideas and google search reveals no similar issues so far.

Anyone experienced this?

We have a problem with one of our deployments of Windows Server 2012 Hyper-V with a 2 node cluster connected to a iSCSI SAN.

Our setup:

Hosts - Both run Windows Server 2012 Standard and are clustered.

• HP ProLiant G7, 24 GB RAM. This is the primary host and normaly all VMs run on this host.
• HP ProLiant G5, 20 GB RAM. This is the secondary host that and is intended to be used in case of failure of the primary host.
• We have no antivirus on the hosts and the scheduled ShadowCopy (previous version of files) is switched off.

iSCSI SAN:

• QNAP NAS TS-869 Pro, 8 INTEL SSDSA2CW160G3 160 GB i a RAID 5 with a Host Spare. 2 Teamed NIC.

Switch:

• DLINK DGS-1210-16 - Both the network cards of the Hosts that are dedicated to the Storage and the Storage itself are connected to the same switch and nothing else is connected to this switch.

Virtual Machines:

• 3 Windows Server 2012 Standard - 1 DC, 1 FileServer, 1 Application Server.
• 1 Windows Server 2008 Standard Exchange Server.
• All VMs are using dynamic disks (as recommended by Microsoft).

Updates

• We have applied the most resent updates to the Hosts, VMs and iSCSI SAN about 3 weeks ago with no change in our problem and we continually update the setup.

Normal operation:

• Normally this setup works just fine and we see no real difference in speed in startup, file copy and processing speed in LoB applications of this setup compared to a single host with two 10000 RPM Disks. Normal network speed is 10-200 Mbit, but occasionally we see speeds up to 400 Mbit/s of combined read/write for instance during file repair.

Our Problem:

• Our problem is that for some reason a random VHDX gets copied to System Volume Information by "System" of the Clusterd Shared Storage (i.e. C:\ClusterStorage\Volume1\System Volume Information).
• All VMs stops responding or responds very slowly during this copy process and you can for instance not send CTRL-ALT-DEL to a VM in the Hyper-V console, or for instance start task manager when already logged in.
• This happens at random and not every day and different VHDX files from different VMs gets copied each time. Some time it happens during daytime wich causes a lot of problems, especially when a 200 GB file gets copied (which take a lot of time).

What it is not:

• We thought that this was connected to the backup, but the backup had finished 3 hours before the last time this happended and the backup never uses any of the files in System Volume Information so it is not the backup.

An observation:

• When this happend today I switched on ShadowCopy (previous files) and set it to only to use 320 MB of storage and then the Copy Process stopped and the virtual Machines started responding again. This could be unrelated since there is no way to see how much of the VHDX that is left to be copied, so it might have been finished at the same time as I enabled  ShadowCopy (previos files).

Our question:

• Why is a VHDX copied to System Volume Information when scheduled ShadowCopy (previous version of files) is switched off? As far as I know, nothing should be copied to this folder when this functionis switched off?

List of VSS Writers:

vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2012 Microsoft Corp.

Writer name: 'Task Scheduler Writer'
   Writer Id: {d61d61c8-d73a-4eee-8cdd-f6f9786b7124}
   Writer Instance Id: {1bddd48e-5052-49db-9b07-b96f96727e6b}
   State: [1] Stable
   Last error: No error

Writer name: 'VSS Metadata Store Writer'
   Writer Id: {75dfb225-e2e4-4d39-9ac9-ffaff65ddf06}
   Writer Instance Id: {088e7a7d-09a8-4cc6-a609-ad90e75ddc93}
   State: [1] Stable
   Last error: No error

Writer name: 'Performance Counters Writer'
   Writer Id: {0bada1de-01a9-4625-8278-69e735f39dd2}
   Writer Instance Id: {f0086dda-9efc-47c5-8eb6-a944c3d09381}
   State: [1] Stable
   Last error: No error

Writer name: 'System Writer'
   Writer Id: {e8132975-6f93-4464-a53e-1050253ae220}
   Writer Instance Id: {7848396d-00b1-47cd-8ba9-769b7ce402d2}
   State: [1] Stable
   Last error: No error

Writer name: 'Microsoft Hyper-V VSS Writer'
   Writer Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
   Writer Instance Id: {8b6c534a-18dd-4fff-b14e-1d4aebd1db74}
   State: [5] Waiting for completion
   Last error: No error

Writer name: 'Cluster Shared Volume VSS Writer'
   Writer Id: {1072ae1c-e5a7-4ea1-9e4a-6f7964656570}
   Writer Instance Id: {d46c6a69-8b4a-4307-afcf-ca3611c7f680}
   State: [1] Stable
   Last error: No error

Writer name: 'ASR Writer'
   Writer Id: {be000cbe-11fe-4426-9c58-531aa6355fc4}
   Writer Instance Id: {fc530484-71db-48c3-af5f-ef398070373e}
   State: [1] Stable
   Last error: No error

Writer name: 'WMI Writer'
   Writer Id: {a6ad56c2-b509-4e6c-bb19-49d8f43532f0}
   Writer Instance Id: {3792e26e-c0d0-4901-b799-2e8d9ffe2085}
   State: [1] Stable
   Last error: No error

Writer name: 'Registry Writer'
   Writer Id: {afbab4a2-367d-4d15-a586-71dbb18f8485}
   Writer Instance Id: {6ea65f92-e3fd-4a23-9e5f-b23de43bc756}
   State: [1] Stable
   Last error: No error

Writer name: 'BITS Writer'
   Writer Id: {4969d978-be47-48b0-b100-f328f07ac1e0}
   Writer Instance Id: {71dc7876-2089-472c-8fed-4b8862037528}
   State: [1] Stable
   Last error: No error

Writer name: 'Shadow Copy Optimization Writer'
   Writer Id: {4dc3bdd4-ab48-4d07-adb0-3bee2926fd7f}
   Writer Instance Id: {cb0c7fd8-1f5c-41bb-b2cc-82fabbdc466e}
   State: [1] Stable
   Last error: No error

Writer name: 'Cluster Database'
   Writer Id: {41e12264-35d8-479b-8e5c-9b23d1dad37e}
   Writer Instance Id: {23320f7e-f165-409d-8456-5d7d8fbaefed}
   State: [1] Stable
   Last error: No error

Writer name: 'COM+ REGDB Writer'
   Writer Id: {542da469-d3e1-473c-9f4f-7847f01fc64f}
   Writer Instance Id: {f23d0208-e569-48b0-ad30-1addb1a044af}
   State: [1] Stable
   Last error: No error

Please note:

• Please only answer our question and do not offer any general optimization tips that do not directly adress the issue! We want the problem to go away, not to finish a bit faster!

Hi,

I have created a linux VM on HyperV which have a dynamically expanding VHDX with max size 127 GB. Post OS installation, the size of this disk become around 8 GB. While, if I create the similar VM on VMware vSphere thin provisioned disk with max size 127 GB, the disk size post OS installation is only around 2GB. I have tried to compact/optimize the VHDX but there is no significant reduction. Is it possible to optimize this disk to make it at par with VMware VM hard disk size? I need to package the VM into DVD and distribute it to my clients.

Hello guys,

Situation is the following. I have 2 Windows Server 2012 with Hyper-V installed. We have approximately 10 VMs on each server and these VMs are replicating in both directions.

We had 2 NICs in teaming (switch independent) connected to 1 switch. Interfaces are in access mode.

On Friday evening we added another switch, where we connected the other 2 NICs of each server, so we decrease the load from the 1st switch. We added these NICs to the team. The switches are connected by trunk port.

Today (Monday) at around 11am (maybe higher network load), both servers got BSOD with 3 minutes difference. One at 11:02, the other at 11:05.

On both servers the cause is listed as vmswitch.sys. I did not find any info on this happening in Google. Here is the output from WinDBG:

Server1

Server 2:

Please help!

P.S. We can remove switch 2, but on Switch 1 we do not have enough interfaces to plug in the other 2 NICs of each server.

Regards

I have just migrated a Windows 2003 guest VM from Virtual Server to a Windows 2012 Hyper-V host.  I had forgotten that the guest used a modem for a fax application.  I know that Hyper-V 2008 did not support a serial modem redirection to a guest OS.  Does Hyper-V 2012 support this?  Note that this is a SERIAL modem, not a USB modem.

Thanks,
Joe

On the Overview page of VMM 2012 SP1 I show Daily/Monthly Performance data for the categories of:  CPU performance, Memory, and Storage.  I have no data for Network.  Would this be related to a WMI repository issue or a simple matter of missing the configuration?  All 4 Hyper-V hosts use 2 network interfaces teamed together.  There are 2 additional interfaces with NO IPs that connect to Coraid AoE storage.  It is possible that the metrics are being pulled on those interfaces.  Any help is appreciated.

I have a server with Windows Server 2012 and with an NVIDIA Tesla M2075 GPU that I would like to utilize in a virtual environment. Specifically, users should be able to log on using Remote Desktop on a virtual machine on this server and use the GPU for computing purposes. Is that possible, can this GPU be exposed in the VM somehow or force the VM to use the hardware for computations?

Hi,

I have two server 2012 hyper-v servers that are member of a domain.

one nic is used for communcating with the network for DNS and AD

one nic for replication

one nic for vm's

How can I get this config working?

Hello all,

I have a HP proliant360 G6 server with four physical Nics and running 2008r2 Hyper-V with Five guest VMs.

I gave the four NICs static ip addresses, but I only want one static ip address showing in my multi domain DNS servers record?

here are some of the settings that done.

1)Locan Area Connection(NIC3)

All protocols are check ed except Microsoft Virtual Network Swtich Protocol.

Static IP and DNS address.

2)Local Area Connection 1

Check only Microsoft Virtual Switch,HP Configuration Utility,IPV4 and IPV6.

Static ip and DNS adddress.

3)Local Area Connection2,3 and 4 same settings as Local Area Connecitonn 1, the only think that is different is when you right click and status shoes internet connection. 

The NICs are setup as an External and I ucnheckd Allow management to share OS ......

I want all the guest VM to be connected to internet.

***I uncheck register name in DNS addresses and deleted it the IPs from DNS table, but they showed up next day.

Any tips will be appreciated

Hi

What would be the best to do.

I will have a Cluster set up with 2012 servers running Hyper-v with a SAn in the back where i will have the Option to use either ISCSI and/or SMB 3.0 to store my virtual machines. Anyone have any preferences in regards to what to use?

Speed, accessabillity, security, backup.

Kind regards

Tore

Hello,

I have to two Win 2012 Hyper-V hosts configured for VM replication.  One is the primary host and the other one is the replica host.  I'm using Windows Server Backup to run scheduled backup of all replicated VMs on the replica host.  Now, I have the following questions:

- Whenever backup is running, replication breaks.  It resumes after backup is complete.  Is this normal?

- There are two external USB disks attached to the replica host to store backups.  Will the backup be automatically stored on the second disk when the first one is filled up?  Is there a way to configure retention policy?

- If the replica host fails, will I be able to restore the VMs on another server?

Shawn

Hello all,

I have a HP proliant360 G6 server with four physical Nics and running 2008r2 Hyper-V with Five guest VMs.

I gave the four NICs static ip addresses, but I only want one static ip address showing in my multi domain DNS servers record?

The NICs are setup as an External and I ucnheckd Allow management to share OS ......

I want all the guest VM to be connected to internet.

***I uncheck register name in DNS addresses and deleted it the IPs from DNS table, but they showed up next day.

Any tips will be appreciated

Hello all.  I've gone in circles on search engines and here trying to find an answer.  It's shocking how common this problem is, that it affects servers so should have a very high priority for somebody at MS to look into, and yet notbody has ever found an answer that I can see.  Most posts I see are older though so I am hoping July 2013 has some answers :)

In short, I believe the problem may have begun 2 days ago when we replaced the building's only network switch with a new Cisco 2960-S switch.  These are simple GbE switches that work out of the box so nothing new has been configured.  I do intend to further configure at some point but this was an emergency replacement. 

Yet the Hyper-V host (2008 R2) is now showing VMSMP Event ID 28 messages in the System Log at a rate of about 30,000,000 entries per day.  Any time I look, there are about 46,000 entries, if I Clear Log and count to 10, refresh and I have between 3000-5000 more entries.  I guess 46,000 is the limit before older ones start ot disappear. 

The VM's appear to be unaffected, but because I exclusively RDP to just the host machine and use Hyper-V manager to access the VM's, I can't be sure.  No users have complained yet. 

However my RDP session freuqntly needs a refresh due to disconnect so clearly this problem affects the host. 

NIC setup is:

4 physical NIC.

4 VMs

VM1 is the primary AD DC, and shares the NIC with the host.  The other 3 NIC's are dedicated to the other 3 VMs. 

The 4th VM though is not in use yet, so in theory the 4th physical NIC is free, however I'm afraid to try to use it for VM1 (thus breaking the "share with host" relationship) because being a little fresh on these subjects I"m not sure what that'll do to the IP address of the AD DC, which if I mess that up brings down the network for the users. 

Of course I'd rather solve the VMSMP problem but as a workaround, can I just assign the 4th NIC to the VM1?  I'm doing this remotely too, so don't want to uncheck "share with mgmt OS" and cut myself off...

Btw, I did try to set static MAC addresses for each VM - no change.  This has never worked for anybody in any post/thread I've seen either if that says anything. 

Totally lost, please help! 

Hello,

I am new to Hyper-V. I installed Windows Server 2012 R2  Preview on a physical server and installed Hyper-V role on it.

I am trying to install Windows 2008 R2 on Hyper-V as a guest OS. 

From Hyper-V manager, I created a VM and supplied 2008 R2 ISO as a boot device.

Windows 2008 R2 ISO is bootable. I have used the same ISO on VMware and it works.

I connected the VM and powered on, but OS instalaltion doesn't start.

I get error " Boot Failed. EFI SCSI Device 1." Below is th screen capture.

How to fix this problem ?

How do I go to Hyper-v VM BIOS settings ?

How do I change the boot sequence for Hyper-V VM ?

Thanks ! Jayawardhane