Loosing sporadically network connectivity on WS 2012 Hyper-V with NAT routing enabled

November 5, 2012, 10:53 am

≪ Previous: Hyper-V Manager fails to boot from eith an image or disk drive

Hi,

i am using Windows Server 2012 (Standard, English) as Hyper-V host. I do have a single vSwitch configured as "internal" network.

If I configure RRAS as a NAT router (on the host) I sporadically loose my network connection to the host. It works for a few minutes, sometimes for an hour, and without any obvious cause I loose my network connection/RDP session.

I used that exact configuration for years in WS 2008 R2. I have no idea, what the root of the problem is.

Thanks for your help in advance,

Thorsten

↧

P2V – Hyper-V

September 6, 2012, 2:36 am

≫ Next: passthrough disk in hyper-v cluster

≪ Previous: Loosing sporadically network connectivity on WS 2012 Hyper-V with NAT routing enabled

Hi,

I just wonder if somebody could help me. I’m looking for free tool (or very cheap) which will move my Windows Server 2003 with 400GB HDD (almost full) to .vhd (or .vhdx as I’m going to use Windows server 2012 as a host).

I wanted to use Disk2vhd but unfortunately I have to increase size of the HDD to 500GB and it has to be fixed. I also prefer to do this as quickly as possible as basically, as file is quite big, create it directly instead of using imaging tools and restore it on Virtual Machine.

Could you advise please?

Thank you.

↧

passthrough disk in hyper-v cluster

July 13, 2012, 10:39 pm

≫ Next: RAID performance issues, reconfig suggestions wanted

≪ Previous: P2V – Hyper-V

Does anyone have official link of Microsoft, regarding pass through disk support with hype-v fail over cluster(2008 R2 sp1)

Darshana Jayathilake

↧

RAID performance issues, reconfig suggestions wanted

November 13, 2012, 9:24 am

≫ Next: Virtual Servers / performance - 2008 R2

≪ Previous: passthrough disk in hyper-v cluster

Hello all,

We have built a total of 6 boxes as our private cloud infrastructure, all of them running Server 2008 R2 and Hyper-V. 3 of these boxes are located at our primary office and use a combination of local storage and iSCSI LUNs utilizing Microsoft iSCSI Target software from our NAS. Those 3 boxes have no performance issues whatsoever and house the great majority of the ~250 VMs currently provisioned in our VMM private cloud.

Recently I built another box for a remote office, similar hardware specs with the only difference being all of the data/VHDs would be stored on local storage. Due to the onboard RAID controller not supporting a suitable stripe size for Hyper-V, I resorted to using Windows software RAID5 for our 5x2TB disks. I know RAID5 is far from hyper-v best practices, and I have passed that information along to my boss but he believes it is the best bang for the buck. I had trouble copying our existing VHDs to the array the first night I was there working on it, it seems as soon as I started the data transfer the disk I/O went through the roof and the whole machine would lock up, explorer.exe would crash. After wrestling with that for awhile, I discovered if I just left it going it would eventually finish the data transfer so that is what I did. The same problem seems to be occurring once we cross the 10 running VMs threshold. Trying to create another VM can cause the whole machine to lock up.

The disk configuration is as follows:

1x 1TB 7200RPM WD RE4 non-raid for OS
5x 2TB 7200RPM WD RE4 - Software RAID5, 128k stripe size I believe.

We are having the same problem with another box we recently built with the exact same specs. With 10 or more VMs running simultaneously, the box becomes unusable and all of the running VMs become very slow.

I'm trying to find hard data to show my boss that we would gain substantially better performance by going to a different RAID configuration. What do you guys think? RAID 10? JBOD? What's the best way to remedy this problem.

↧

Virtual Servers / performance - 2008 R2

November 8, 2012, 2:32 pm

≫ Next: DPM places server intoSaved state backup

≪ Previous: RAID performance issues, reconfig suggestions wanted

I'd like some opinions on running multiple virtual machines on a single host and how much performance can be affected.

Our servers run a single Xeon E3-1270 processor with 32GB memory. 4 Western Digital RE4 1TB drives are in RAID 10 on an Adaptec 6405 card with module for cache protection. There are two onboard NIC's, one dual-port NIC and one single-port NIC via PCI Express slots. I plan to team the onboard to access the host server. The dual-port NIC's I plan to team for the VM's, and the single port NIC I plan to connect to a different switch which connects our storage devices using iSCSI to seperate traffic.

The physical server OS will not run anything other than Hyper-V role. I plan on having 3 virtual machines on this server.

1 VM will run Active Directory and DNS (4GB memory allocated)

1 VM will run Sage accounting (16GB memory allocated)

1 VM will run Print and WSUS (4GB memory allocated)

That leaves 8GB memory for the host or if I need to spawn up another virtual machine.

On the other server, same specs.

1 VM will run AD/DNS replicated (4gb memory)

1 VM will run engineering software (database driven) (16gb memory)

1 VM will run Symantec Endpoint Protection and Ghost Server (4GB memory)

We have 38 users total. 12 of which use Sage concurrently throughout the day. We have 8 network printers.

Given the specs on the server, is there any bottlenecks you can think of that would hinder performance running 3 VMs on each host.

↧

DPM places server intoSaved state backup

November 20, 2012, 5:22 pm

≫ Next: Cannot load vdh or vhdx after server rebuild

≪ Previous: Virtual Servers / performance - 2008 R2

Hi , we have a windows server 2008r2 server which is placed into saved state during backup operations even though DPM reports it will use child partition snapshots.

I have gone through the following but cannot find a condition as to why the server is being placed into saved state, is there any tools to run a check on the server to validate the configuration etc and check which method DPM will use to backup the guest.

Conditions when DPM fails to back up Hyper-V virtual machines in an online state

By default, System Center 2012 – Data Protection Manager (DPM) performs a backup of a Hyper-V Virtual Machine (VM) in an online state. However, DPM cannot back up a Hyper-V VM in an online state, if one or more of the following conditions are true:

Backup (Volume Snapshot) Integration Service is disabled or not installed.
The virtual machine has one or more dynamic disks.
The virtual machine has one or more non-NTFS based volumes.
The virtual machine Cluster Resource Group in a cluster setup is offline.
The virtual machine is not in a running state.
A ShadowStorage assignment of a volume inside the virtual machine is explicitly set to a different volume other than itself.
An App-V drive is installed on the virtual machine that creates a non-NTFS volume.

These conditions are set by the Hyper-V writer. In such a case, the VM is put in a saved state before a snapshot of host volumes are taken (except when the VM is turned off) for a backup. The Hyper-V writer adds the VM in the following format:

For offline backups: Backup Using Saved State\<VMName>
For online backups: Backup Using Child Partition Snapshot\<VMName>

Note
During offline/online backups, the name of the data source remains unchanged even if the VM configuration changes to support online backups or for any further backups.

-----

↧

Cannot load vdh or vhdx after server rebuild

November 21, 2012, 11:03 am

≫ Next: Windows Hyper-V 2012 free manage from windows 7 pro

≪ Previous: DPM places server intoSaved state backup

Hello,

We had a problem with some hardware on our Server 2012 Hyper-V and the server had to be rebuilt. I restored all the vhd and vhdx files and am having a problem when I recreate one of the VM's... the error I get it "Failed to add device 'Virtual Hard Disk' if I show details it says Failed to open attachment ' The file cannot be accessed by the system. This is only happening with one particular server, all the others had no problems. The server had 3 disks attached and I get the same error no matter which one I try and attach. Does anyone have any suggestions?

Thanks,

Gavin

↧

Windows Hyper-V 2012 free manage from windows 7 pro

November 21, 2012, 8:29 am

≫ Next: Virtual Domain Controller - Slow Logout

≪ Previous: Cannot load vdh or vhdx after server rebuild

Hello, I have a windows hyper-v (free) now in workgroup mode and want to manage this from a windows 7 pro (in domain ).
I can ping from hyper v to win 7 and from win 7 to hyper v.
I want to setup the hyper v from the windows 7 and after it is setup move to customer and join domain there.
I did see this http://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/0a77e1d7-0f37-4af8-9847-3c9369fafab6
Is there allready a solution for this?
regards,
Marc

MarcH

↧

Virtual Domain Controller - Slow Logout

November 21, 2012, 5:47 am

≫ Next: How to capture the packages of the VMs from another VM

≪ Previous: Windows Hyper-V 2012 free manage from windows 7 pro

Hey,

I have a new laptop that I just bought that has Windows 8 on it. I installed Hyper V, and installed Windows Server 2012 as a guest OS. I need to do some testing at home with a similar environment to work. One of the tools that I need to use is Hyper V Virtual Machine Manacer (SCVMM). That tool requires that the host running it is on a domain. Therefore, that is why I installed the virtual domain controller. I created the domain, and joined the host OS to it (Win 8).

I understand that if the DC is not running, the login will use cached credentials, which is fine with me. My purpose was just to be on a domain, I don't necessarily care if the VM running the DC is online or not. I would prefer to leave it offline (due to resources).

So, everything seems to work OK when the DC VM is offline. However, I noticed that sometimes when logging out, it is extremely slow (very slow logout times). I'm not sure if this is because the Win 8 O/S is trying to contact the DC, and it is timing out. Is this what is causing the slow time? Is there a way to shorten this timeout?

Any insight?

Thanks in advance!

↧

How to capture the packages of the VMs from another VM

November 21, 2012, 7:13 pm

≫ Next: Mouse not captured in remote desktop session

≪ Previous: Virtual Domain Controller - Slow Logout

VM1: test-winxp-6 (monitored VM whose traffic needs to be captured and analysed)
VM2: test-winxp-NM (monitoring VM on which Microsoft Network Monitor has already been installed)

VM1 and VM2 are in a same virtual network (Virtual Network - External to physical NIC #2) and have the same VLAN ID (VLAN305). I already enabled the promiscuous mode (P-Mode) in Microsoft Network Monitor on VM2. But VM2 was still not able to monitor the traffics or capture the packages which are from VM1 except broadcast. I noticed there is a description Microsoft Virtual Switch in theNotes filed in the Virtual Network Manager. Does this mean Hyper-V virtual network only supports "switch port" instead of "hub port"? Is there a solution to enable the "hub port" or is there a workaround to capture the VM1's packages? Thanks!

↧

Mouse not captured in remote desktop session

February 11, 2011, 9:52 am

≫ Next: Failover cluster: Move or Migrate Virtual Machine breaks network on all snapshots

≪ Previous: How to capture the packages of the VMs from another VM

I was able to manage from my R2 box with remote desktop connection manager to remote into hyper-v host server and then manage guests but since the install of SP1 RC on my box I'm getting this error. Why?

ENV: Windows Server 2008 R2

↧

Failover cluster: Move or Migrate Virtual Machine breaks network on all snapshots

November 21, 2012, 5:41 am

≫ Next: Hyper-V downgrade rights - Server 2008 R2

≪ Previous: Mouse not captured in remote desktop session

We have a new Win2008 R2 Failover cluster with 3 nodes and a set of 30+ VM's exported from a series of stand alone Hyper-V hosts. Each VM has between 6 and 30 snapshots. All hosts and VM's have the same virtual network name. When imported on a cluster node all network settings are ok and all snapshots work.

If we move or migrate a VM to another node than where it was imported, all snapshots on the VM show a configuration error on their network adapter. The guest OS has no network anymore and the snapshot config does not allow for it to be changed.

What is the point of migrating anything if it break everything that isn't running on its original host? How can I fix this?

↧

Hyper-V downgrade rights - Server 2008 R2

November 21, 2012, 5:22 am

≫ Next: Hyper-V causing "stuttering" on Windows 8 Pro

≪ Previous: Failover cluster: Move or Migrate Virtual Machine breaks network on all snapshots

Hi!

I have the following problem:

If I run a Windows Server 2008 R2 Datacenter OEM System as a Hyper-V host I can use the virtual key provided by my OEM to use an unlimmeted amount of virtual machines with Windows Server 2008 R2 Datacenter on this system. But do I have downgrade rights to use Windows Server 2008 R2 Datencenter AND Windows Server 2008 or Windows Server 2003 (R2)? I still want to use some machines with the virtual key and Server 2008 R2 but additionally some machines need to run as Server 2003 R2.

Does the licence right change if I add the server into an cluster?

I found the link to this site (http://www.microsoft.com/windowsserver2008/en/us/downgrade-rights.aspx), but it redirects to the Server 2012 page. In addition I read different unclear answers during my research. Some people said it is possible and some said it is not legal. I know that I have a downgrade right with the main key but I still want to use Server 2008 R2 as Hyper-V host.

Hendrik W.

↧

Hyper-V causing "stuttering" on Windows 8 Pro

November 21, 2012, 9:11 am

≫ Next: Resource Pools

≪ Previous: Hyper-V downgrade rights - Server 2008 R2

When I'm running a Hyper-V VM (which I run most of the time) that is set to use 8GB of RAM, occasionally my mouse will experience "stuttering" or lag. It can happen multiple times in a row, and sometimes is spaced out over hours.

Machine specifications:

Windows 8 Pro

i7-2500

16GB RAM

nVidia GeForce 470GTX

Hyper-V VM is on a secondary SATA drive that is only used for Hyper-V

Hyper-V VM is using 8GB fixed (another one is using 8GB min, 12GB max -- not running at the same time of course) with 2 vCPUs and two VHDX's, fixed.

SharePoint - Nauplius Applications
Microsoft SharePoint Server MVP - 2012

↧

Resource Pools

November 2, 2012, 12:47 pm

≫ Next: Driver installations with Hyper-V 2008 R2

≪ Previous: Hyper-V causing "stuttering" on Windows 8 Pro

I'm currently looking at VM resource pools in Hyper-V and I'm wondering how they work. I created a pool using:

New-VMResourcePool "Database Engine Services" Processor,Memory,Ethernet

Now, how can I associate a VM to the pool for metering purposes?

When I use Enable-VMResourceMetering, there's no way to associate a VM to a pool. I checked Set-VM as well but I couldn't find a way using that either.

What I would like to have ultimately is a hierarchy of pools for reporting purposes. i.e.

Servers
Servers\Database Engine Services
Servers\Web Application Services
Servers\Reporting Services
Servers\Reporting Services\SSRS

So I could wrap the stats at different levels, depending on what I want to look at. I see that a hierarchy of pool is possible judging by Set-VMResourcePool.

Any help/guidance on this would be appreciated.

Thanks!

Mathieu

↧

Driver installations with Hyper-V 2008 R2

November 21, 2012, 2:23 pm

≫ Next: Access denied when starting VM.

≪ Previous: Resource Pools

A few of our servers are custom built using the Asus P8B-X motherboards.

The ones I have a problem with are Chipset and VGA.

I got the drivers from the ASUS web site, but they are all .exe installers. If I try to use 7-zip, it shows a few hundred files and a bunch of .inf ones. Not sure which to pick?

At least with the RAID controller, I had to pick it during the installation so that driver is already installed.

If the VGA is not really a big deal, I can avoid it, but I know the chipset would be an important one to have.

As for networking, we have onboard Intel gigabit ports and a PCI-E dual Intel gigabit card - 4 ports total on each system. Would like to setup teaming with 2 ports to use with the few VM's we'll have running.

Thanks in advance for the help.

↧

Access denied when starting VM.

November 21, 2012, 1:00 pm

≫ Next: Import VM in 2012 - In-Place, though create new ID?

≪ Previous: Driver installations with Hyper-V 2008 R2

I checked permissions on the VHD and I set them very loosely, everyone has full control, system has full control, domain users have full control. This is Windows 8 Enterprise Hyper-V.

Devon Quick

↧

Import VM in 2012 - In-Place, though create new ID?

November 21, 2012, 9:44 am

≫ Next: Error 14050

≪ Previous: Access denied when starting VM.

With the Importing of a VM in 2012 you have the option of InPlace keeping the registration ID, or copying the VM and placing it in a new location and creating a new Registration ID.

Is there a way to do In In-Place Import of the VM and HDs, though create a new Registration ID?

I'm copying VMs from different Hosts and don't want to have to copy twice to just have it import it with a new ID.

Thanks!

↧

Error 14050

June 15, 2010, 8:39 am

≫ Next: Windows Server 2012 Hyper-V Cluster step by step

≪ Previous: Import VM in 2012 - In-Place, though create new ID?

Hi,

I'm trying to set up Hyper-V on my win2008r2 server and I'm always getting this error:

Failed to register service principal name.

I've checked the ACL and it is configured as it should: SELF has all the necessary rights.

My machine has 2 NICs - one is configured to be the management network, so the port is set to access with one VLAN only.

The second NIC is planned for the virtual network, so the port is set to trunk and has all the required VLANs assigned for it.

When I'm asked to choose the NIC for the virtual network, I select the specific NIC for it and restart the server when asked to. Once the server is up, the role is displayed with X and the event viewer provided the mentioned 14050 errors.

What am I doing wrong and how should I avoid those errors?

↧

Windows Server 2012 Hyper-V Cluster step by step

November 17, 2012, 1:11 am

≫ Next: Virtual Sound Card - Server 2008 R2 w/ Hyper-V

≪ Previous: Error 14050

Hi All,

I know this question has already been posted before and the answer was http://blogs.msdn.com/b/clustering/archive/2012/05/01/10299698.aspx this blog website, My question is slightly different:

1. Windows Server 2008 R2 Hyper-V Cluster and Windows Server 2012 Hyper-V Cluster deployment is same (is it true)

2. Windows Server 2008 R2 Hyper-V Cluster TechNet states that i should have a dedicated network adapter for Management, CSV, Live Migration and Virtual Machines which means at least 4 network adapters should be there, so in windows Server 2012 does it apply the same, if yes can you please share the technet article for 2012 which states the same

3. In Windows Server 2008 R2 Hyper-V Cluster TechNet states that every network adapter has its own metric, the management network starts with 10,000 and csv (heartbeat) starts with 1000, does it apply the same in 2012 hyper-v cluster, if yes please shre the technet article,

4. if i need to change the metric of csv or live migration network adapter there is a power shell command or it can be done by GUI

5. In 2008 R2 hyper-v cluster live migration network preference is always first so that vms are moved through live migration network adapter and the second preference is management and third one is csv, does it still applies the same or some thing is changed here in 2012 hyper-v server.

Thanks in advance

Lyncy

↧

Latest Images