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Need help with super slow 1 way move between hosts

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Hi guys. I need help please.  I've got 2 Dell Poweredge T320s running Hyper-V 2012 Core.  Both with 4 512GB SSDs in a RAID 5 and 4 Broadcom NICs.  Anyway, when I try to move a VM from Host 1 to Host 2, it is super slow taking hours to move a few gigs.  However I can move a VM from Host 2 to Host 1 at Gigabit speed.  So, it is just a 1-way problem for some reason.  I've tried with and without NIC teaming (windows),  I've tried turning off VMQ, and Checksum Offloading but neither helped like others have suggested it does.  I've tried with and without Jumbo Frames, but nothing has resolved my issues.  I can use a command line to copy VHDs from server to server at 108+MB/s! (1GB speed) so it is just when moving VMs that it takes forever from Host 1 to 2.  Any advice would be appreciated.

Application Consistent replica -Hyper-V Replica

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what should I do to  create application consistent recovery points? is there any procedure to be followed? any down time or performance issue is expected?


Karthik R

Server 2012 Virtual Machine BSOD after hardware crash - 4 times

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I have now had 4 Server 2012 VMs fail to boot after a hardware failure in the cluster, requiring the servers to be rebuilt. This has happened in a span of 2 months since we started deploying this configuration and using Server 2012.

This has happened at 3 different locations, meaning it is NOT tied to a specific SAN, switch, or server.
-The first and second failures was when the Hyper-v servers both BSOD at the same time, causing the guests to die. BSOD was due to a network driver issue, and both systems receiving the same bad packet.
-The third failure was in our lab as we were building the cluster prior to production deployment. We had a power outage that killed the SAN, but left the storage and switch running.
-The fourth failure was when we had the switch doing iSCSI reboot on us. None of the Server 2008 machines were effected, but 1 of our 2012 Domain Controllers BSOD and needed to be rebuilt from scratch.

Here's the hardware setup for each location. I have this setup in 15+ locations, the problem has happened in different locations, so it is not specific to one location's hardware.

-2 Cisco UCS servers running Server 2012 Datacenter with Hyper-V in a cluster.
-Nimble storage array for iSCSI volumes.
-HP switch for iSCSI backbone.
-All hardware and drivers are being updated at the time of the build.

The dead systems all share these things:
-Running Server 2012 standard
-Domain controller
-created from the same template VHDX file

At this point I have no faith that any VM will survive any sort of hardware crash or power outage. I can see it occasionally causing a VM to not boot after a crash, but we've had 5 system crashes, and of those 5, 4 of them have caused me to rebuild a Server 2012 guest VM. That's an 80% failure rate.

Anyone else experiencing this level of failure?

I've been doing iSCSI VMs on VMware for 6+ years, seen countless crashes, and never had to rebuild a VM because of it. This is my first go at hyper-v. I'm not trying to bash it and say VMware is better, I'm just amazed at what I'm seeing, as it's not expected.

I've followed all the guidelines of MS and the storage vendor for iSCSI configuration. The problem doesn't appear to be storage related though. The VM will boot, so the VHDx file is not corrupt,it just seems that Server 2012 as a VM is not very crash resilient.

I have some systems in the lab now getting ready to ship, I am going to see if I can BSOD a Server 2012 guest running on local storage.

Can a Hyper-V VM use the host's VPN?

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I'm in a development environment and I've just switched from a desktop PC located in my office to a laptop which I use at the office and at home.  I used to RDP to the desktop in the office when I was working at home, through a VPN (standard Microsoft VPN client).  I'm running Windows 8 Pro with Hyper-V on the laptop, with a number of VMs which I use intermittently.  Those VMs need to be able to access the office network.

Is there any way of having the VMs access the office network using the VPN that I have running when I'm at home?

Cluster Validation says two VM's have local paths.....

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Hi:

Out of all the VM's (100+) we migrated from a 2008R2 cluster to our new 2012, we have two VM's that are saying "Unsupported Cluster Configuration".  When we run the Cluster Validation, it tells us that both of these have a local path that isn't on the CSV.  However when we look at each of these VM's config, nothing is pointing to the local path.  This is the path it is saying it has somewhere in it's config "C:\ProgramData\Microsoft\Windows\Hyper-V".  How do we find this and change it?

  • The Hardrive's are IDE and pointed to the C:\ClusterStorage\...
  • Snapshot File Location is pointed to the C:\ClusterStorage\...
  • Smart Paging File Location is pointed to the C:\ClusterStorage\...

Where else could these two VM's have a pointer to a local HOST as mentioned above?

Thank you,
Stangride

How to connect USB external Harddisk to Hyper-v virtual machine

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Hi,

We are running hyper-v server 2008 R2, we have external USB harddisk connected in hyper-v Manager, we are not able connect this USB to virtual machine.. is this option is available in hyper-v? if no is there any document from microsoft stating the same?

Regards

Asha


Virtual Processors to Physical

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Hi:

We have (10) Physical Hyper-V hosts running Server 2012 DataCenter.  Each Host has 2 Sockets, 12 Cores and therefore 24 Logical Processors.

When I look in VMM 2012 Sp1, I show that we are using right now 182 cores and that is spread out over 100 VM's.  Can someone help me understand how many more cores we should have left to assign and/or what the ratio/calculation is for best practice here?

Thank you,
Stangride

1 vm out of 8 missing from the HV console after a restart

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I am running 2008R2. The host has 8 other VMs running. after a restart all but 1 came back. the one that dissappared does not show in the console, but the drive on the host is mapped and i can see all of the files in it(vhd & XML) what is the easiest and safest way to bring it on line? this my user file storage and the VM was about maxed out (15GB out 500GB free) do i need to add more space to the volume to get it started?

How much memory for hyper v host and VMs

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Hi

In a couple of months time i am going to deploy my first server 2012 Hyper V host and virtual machines. The host server has 24Gb RAM. I am going to have four virtual servers. DC, File/Print Server, MDT, and a database server. Can anyone recommend how much RAM I should give the host and each VM?

Thanks in advance

Shane

Adding Virtual Machines to a cluster but they don't show in the Roles

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Hello,

I'm new to the clustering and I had a stand alone server with 8 Virtuals running on it.  I create a cluster and joined this server to the cluster. I first tried to figure out how to move the vmachines in to cluster and gave up.  So I just deleted them in Hyper-V manager and copied the vhdx to the LUN on my cluster and went to Roles and clicked New Virtual Machine and selected the hard drive and all seem to work as excepted. Then I noticed the Machine showed back up in Hyper-V manager is that normal? So then I tried this same approach on a second server it seemed to work but the Vmachine does not get added to the Roles only the first machine is listed in the Roles on the Cluster. It does show in the Hyper-V manager.  Am I missing something? 

What I have it a two node cluster both running server 2012  with a P2000 G3 storage.

Thanks 

Randy


Moving a clustered VM to regular Hyper-V

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We have a 2008R2 server VM running in a cluster. It's an Exchange 2010 server running as a simple VM. However, the cluster storage performance is poor (1Gb iSCSI), and I want to move this VM to a stand alone Hyper-V host.

A manual move seemed to work, and the VM boots, and the drives all mount properly, but I can't get the virtual network adapter to work. I have tried removing and re-adding the virtual network in the host, and deleting and re-adding the adapter in the VM. No good. Just get an Unknown device each time. I tried reinstalling the integration services. But it just sees there forever trying to update.

I suspect some cluster specific elements are still in the VM, and these are causing the issue. Is there any way to do this?

Run the Same VM in Different Hosts

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Basics:

  • 1 server hardware using boot from VHD
  • Current hardware OS is Windows Server 2008 R2 with Hyper-V (booted from VHD)
  • Several VM running in hardware host OS for dev/test/etc

Want to do:

  • Add 2nd hardware boot option for Windows Server 2012 (in VHD) with Hyper-V

Question:

Are there any issues with running the guest VM's in the different hosts?  Whichever is booted on the hardware at the time, but it will go back and forth.

Windows Server 2012 Hyper-V - Query total memory on guest with dynamic memory

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Is there a way to know, from the guest VM, the maximum memory configured for a VM in Windows Server 2012 Hyper-V?

Paulo Morgado

HyperV guest loads slow on Win2008R2

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this is by far one of the strangest things I have seen. I have a win 2008R2 cluster with a CSV. the CSV itself is on an iSCSI storage (hitachi HUS 110) basic config of the two hosts in the cluster is

  • Dell R610
  • Win 2008 R2 Enterprise with all patches
  • 64GB
  • 1 NIC for host access
  • 2 NICs for guest VM access
  • 2 NICs for iSCSI

these machine work great and I can load a 2008R2 test guest machine on them in less than 90 seconds

after the above config is running for over a year, I now need to add a new host. the new host is

  • Dell R620 (Still intel but different CPU)
  • same Win 2008 R2 Enterprise with all patches
  • 64GB
  • 1 NIC for host access
  • 2 NICs for guest VM access
  • 2 NICs for iSCSI

I added this new host to the domain and to the cluster, I gave it access to the CSV and I tried loading the same guest machine that loads in 90 seconds in the other hosts. the machine loads in about 6 minutes. no matter how many times I try this the old hosts load the machine in about 90 seconds and this new host in around 6 minutes

to eliminate any problems with the iSCSI connection, I added a new LUN and directly accessed it from the new host and I was working at around 300MB/s so no problem there. I also tested the connection between the other hosts and the new one and network is working fine there too.

to eliminate problems in HyperV, I copied the machine to the local disk of the new host and it loaded in less than 20 seconds.

now is the point were things get a lot stranger: in my tests I tried installing a fresh windows guest machine to the CSV from the new host. I noticed that while the fresh windows was installing, my test guest was loading in less than 90 seconds even on the new host (I repeated this a few times). If I paused the fresh install guest and tried loading the test guest again it loaded in 6 minutes. and again after I resumed the guest installation the test guest loaded fast.

after the fresh windows was also loaded, I ran tests loading the fresh window and my test machine. each one of them loaded in about 5-6 minutes when I tried loading them separately. however when I started both of them in the same time they both loaded in around 2.5 minutes

it seems that the iSCSI disk access is only working if it is under some load (although I never got to above 10% utilization according to the task manager)

does anyone have any idea what could be the problem?


Dani Avni

Loss Communication- HyperV

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Dear all,

I get the below mention message in my hyper-v manager for Linix VM's

"Heartbeat:Lost Connection" 

OS: Windows 2008 R2 with Sp1  Enterprise Edition

Linux: Suse Linux Enterprise server 11

Please advice. 

Regards,

Sumanth


Regards, Sumanth


PowerShell remoting fails to move a VM from one host to another host

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This is for Hyper-V 2012 servers under Windows 2003 domain. CredSSP is not supported.

This command works:

move-vm  -name vm1  -computername hypervA  -destinationhost hypervB

This one is not working:

$pss = new-pssession -computername hypervA
invoke-command -session $pss {move-vm -name vm1 -destinationhost hypervB}

The error is "You do not have permission to perform the operation. Contact your administrator if you believe you should have permission to perform this operation."

Both hypervA and hypervB have delegation enabled for each other for "Microsoft virtual system migration service" and CIFS enabled for the SMB server.

What else needs be enabled for the powershell remoting?

Thanks.


Hyver-v 원격 관리 에대해서 문의 드립니다.

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안녕하세요. hyper-v 를 이용해서 VM 관리를 하고 있는 개발자 입니다.

그런데 한가지 문의 드릴 사항이 있어서 이렇게 질문 드립니다.

Hyper-v 관리자 에서 원격 컴퓨터 연결 하는 기능 (console 연결) 을 

원격 Pc 에서 사용하고 싶습니다.

여러 포스팅을 찾아보니깐 hyper-v 원격 접속 에 관한 내용을 보았습니다.

그런데 이것은 server, client pc 모두 설정을 해줘서 

client pc 에서 hyper-v 관리자를 실행 시켜주는 행태였습니다.

제는 hyper-v 관리자 를 실행 시키는 것이 아니고

client pc 에서 바로 (console 연결) VM 에 연결을 하고 싶습니다.

물론 VM 에 직접 mstsc 로 접속 하면 되겠지만 원격이 막힌 상태이고 

관리자가 hyper-v 서버에 접속 하지 않은 상태로 VM의 상태를 확인하고 싶습니다.

혹시 가능한지 또는 참고할 만한 사이트라도 알려주시면 감사드리겠습니다.

부탁 드리겠습니다.

감사합니다.

VM's:Lost Connection

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Dear all,

I get the below mention message in my hyper-v manager for Linix VM's

"Heartbeat:Lost Connection" 

OS: Windows 2008 R2 with Sp1  Enterprise Edition

Linux: Suse Linux Enterprise server 11

Please advice. 


Regards, Sumanth

Very slow network performance with Intel NIC when TCP Large Send Offload is enabled

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I have a Windows 2008 server with two NIC's (Intel PRO/1000 PL and Intel PRO/1000 PM), and one virtual external switch connected to each NIC.

 

With the 01/14/08 network driver, I get very low throughput on both NIC's (~10KB/sec when downloading from my server when it should be around 11MB/sec).

 

I've found that disabling "TCP Large Send Offload (IPv4)" on the virtual switch and "Large Send Offload v2 (IPv4)" on the physical adapters solves the problem.

 

Is this a bug in the driver?

 

Thank you,

 

Ricardo Costa

hyper-v 2012 promiscuous mode for the vswitch

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Hi,

I have been try to figure out on how you can enable promiscuous mode for the 2012 hyper-v v-switch.  So far, tried couple of the google search and none of them give any good response.

Wonder if anybody here has get it to work successfully?

Thanks

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