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How to quickly back up my Windows 8 Hyper-V VMs

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Hi, I have a number of Hyper-V development VMs running on Windows 8 which I need to back up fairly often. Normally I power down the VM and just copy the vhd file to an external hard drive. As you can imagine this is dreadfully slow due to the large file size.

Are there any products available that will allow me to quickly take a backup of the VMs? I'm thinking along the lines of a differential backup so that only the changes need to be saved from a previous session. Any suggestions?


How to assign new disks to existing Virtual Machine.

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Hi friends, 

I have a Hyper-V 2012 server with a Server 2012 Virtual Machine running on it. I have installed three new disks and created a hardware RAID5 with them.. I booted the Hyper-V 2012 Server and the new RAID was then available to the system and listed under disk management. So, I took the RAID disk offline in the Hypervisor, then shutdown the Server 2012 Virtual Machine and added the new RAID disk as a passthrough disk.. 

However, when we tried to back up the disk (which shows up as E: in the Server 2012 Virtual Machine) ArcServe gives me an error. I am currently talking to ArcServe about this error, but this is my question: 

Is this the correct way to make the RAID available to the Virtual Machine? 

thanks, 

J

Covert 12TB fixed VHDX to Dynamic

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I need to convert a 12 TB fixed VHDX to Dynamic. Right now there is only about 1.2 TB of data on the vhdx. When I convert will it automatically shrink the vhdx file to 1.2 TB. Or do I need to run something else on the converted vhdx?

Thank you for your time.

Restoring a Hyper-V backup using Windows Backup

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After a scare this past weekend, I decided to test out my backups by doing a restore of a Hyper-V guest. Good thing, because I'm running into an issue. 

We have two Windows Server 2012 servers acting as Hyper-V hosts. Both of these machines backup using Windows Server Backup to a shared drive on a Windows 7 Pro computer.

That shared drive is physically a Tandberg Data Quikstor. If you've never seen a Quickstor, it's a box that hooks up to a computer via USB and uses little ejectable hard drives for storage. Think tape drive, but little hard drives instead of tape carts.

I wanted to test a scenario where one of our Hyper-V guests was completely hosed and needed to be restored from a backup. I set up a new Windows 2012 server, installed the Hyper-V and hooked up the Quickstor directly to the server.

I fired up Windows Server Backup and tried to do a restore of one Hyper-V guest. The restore immediately fails with the error "You can only recover entire volumes from backups stored on DVDs or removable media. File recovery is not supported."

I guess the error is self explanatory but it took me by surprise. Because I stored my backups on what amounts to a removable hard drive I lose the ability to restore individual files? That seems like a strange restriction, just about any offsite backup is going to involve removable storage.

Are there any workarounds to this issue? What if I backed up directly to the hard drive of the Windows 7 machine? Could I then use that backup to restore individual files?


[2008 R2] Hyper-V Dynamic memory warning with half of vHost memory free

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Our virtual server host system has about 19GB of Memory free (out of 32GB total), yet a virtual guest using Dynamic Memory was only being assigned 8GB and the demand was around 13GB, therefore generating a Warning state on the Memory Status. Logging onto the guest machine showed about 8GB of memory being used as well. The end-users were receiving memory errors in their applications. Any idea why the guest system was in this warning state?

KB2920189 fails to install on generation 2 vm's

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It looks like there is a problem with the KB2920189 update.

When trying to install it via Windows Update on some servers, they all fails the installation of this update - they are all running 2012 R2 inside generation 2 Hyper-V machines.

Has this update been tested with the UEFI implementation inside Hyper-V?

Hyper V 2012 Download

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Where can I download Hyper V 2012 Core? Also is this already the version that can be used in production? Or still in Beta?

Integration Components Download

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I would like to update the version of IC that our guests are running.  MS does not go out of their way to advertise the location of any IC downloads other than the Linux IC.  So...  Where can I go to find the latest version of the Hyper-V Integration Components for Windows Guests???

Route all traffic from host to UTM appliance

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Hi,

I have a single Hyper-V 2012 R2 host, which is configured with 2 physical NICs:

1 x private IP for private LAN

1 x public IP for management

And a virtual switch added with a public IP

^ This is from a public IP address to give VMs public internet access (all VMs use the IP address defined above as a gateway, for internet access).

What I want to do is for traffic on the host itself (e.g. a ping on the host), I want to route that to my UTM appliance which is a VM on the same Hyper-V server. This has rules configured to block outgoing ping etc, which the VMs use. 

I set a proxy on the Hyper-V server to the private IP of the firewall, but this does not have any effect.

What's the best way to achieve this?

Thanks

SOS!!! Recover Lost VHD

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Hello,

I urgently need your help with this request and I will appreciate a quick response.

I performed a live migration of my VMs from one HYPERV host to another. Unfortunately, I lost the physical disk of the second HYPER-V host and I can't recover any files from it.

Is there a way I can recover the VHD from the initial Host as I think this is my best option right now. What usually happens to exported VHD during live migration?

Many thanks

SAN


SAN

Hyper V and networking

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currently have a few hyper v vm servers running on one host. My issue is that the physical nics are getting dhcp addresses from my dhcp server, however I have static addresses on my vmhosts all using external connections to the physical nics. Inside the vms they are set to static. should I be setting the actual physical nic on the host to the same static as the running vm? so that the host doesnt pick up dhcp addresses for no reason?

Massive Fibre Channel Performance dropoff after installing Hyper-V Role

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Hi all,

using direct attached fibre-channel disk we see throughput of approx. 500-800MB/s if we copy/paste a 28GB file to the same disk.
Once we install the Hyper-V Role, and re-test, we see a throughput of 126MB/s maximum performing the same task.

In addition throughput speeds become extremely varied ( from 126MB/s down to 1MB/s! ) for the same transfers.

Hardware and Software details given below.

Have you seen this behaviour? Can you recommend a resolution?

Best Regards, Sascha

Server: HP DL380 Gen8, 128GB RAM, XEON E5-2630 @ 2.3ghz (2 CPU)
OS: Server 2012R2 (patchlevel 03/06/2014 via Windows Update Service)
FC: 2 x Emulex LighPulse HBA 8GB (Driver: 2.74.214.4) with MPIO
NIC: HP NC523SFP 10Gb 2port (Driver: 5.2.2.412 Teamed LACP)


Hyper-V 2008R2 Cluster only backup a Windows 2012 VM with saved state

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Hello,

We have a 3 node Hyper-V 2008R2 Cluster with 20 VM's. We have also now some Windows Server 2012(r2) VM's on the cluster. The problem is that the backup of these VM's are only done trough saved state and not online. I already did some searching and I know it's a Hyper-V VSS problem that should be solved with setting a registry key inside the W2012 VM(http://mvanvliet.wordpress.com/2013/04/10/issue-windows-server-2012-virtual-machines-can-only-be-backed-up-using-saved-state/). But this doesn't work for me. I also checked this settings:

  • 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.

None of these are true. Does anyone have onther option to solve this? Thanks!

Questions about Tape drive pass through in Hyper-V? "why is it not an option?"

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Why is it that Hyper-V does not support tape drive pass through. Every other virtualization program i have tried supports this. Hyper-V seemed to work great for me but without this feature I can't use it.

 

It seems like a giant limitation by MS to not allow the pass through of devices connected to SCSI, SAS, and Fiber HBA's. rather then allow us to actually utilize the multiple servers for functional reasons its only good for running software apps.. You might as well just run them all on a single host i mean why virtualize your DNS, DHCP, and other ____?

I know that MS has its head in the sand in regards to tape and think its a dying media disregarding the gigantic sales but this seams a bit ridiculous even taking that into account.


Perhaps I am missing something is there a functionality or security reason that they do not allow this when every other virtualization software allows you to pass external hardware into the container "virtual machine" so i know its possible but Hyper-V only allows you to add tapes?


I am lost thanks for the help :)

Thanks,

Matt

Activating VM with Server 2012 R2 Standard

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Hi all

I have a new test server with Server 2012 R2 Standard, problem is when I try and use get a VM of Server 2012 R2 Standard up and running it say that the VM is not activated and asks for a key. The keys that work for the Datacenter version do not work for the Standard edition.

Any thought on this?

Thanks again

Tim Jardim


IOPS capped on a VM within Hyper-V

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quick question ... we get 100,000 IOPS once we used SQLIO against a VHDX file . ( let's say disk2.vhdx) 

from inside a VM , we mount the same disk as a secondary disk and run SQLIO against it ; we get about 30,000 IOPS. 

There is no QoS for storage defined yet .. 

Is there any other limit ? we increased VM memory to 64 GB , processor to 8 and never went above 30,000 

Massive Fibre Channel Performance dropoff after installing Hyper-V Role

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Hi all,

using direct attached fibre-channel disk we see throughput of approx. 500-800MB/s if we copy/paste a 28GB file to the same disk.
Once we install the Hyper-V Role, and re-test, we see a throughput of 126MB/s maximum performing the same task.

In addition throughput speeds become extremely varied ( from 126MB/s down to 1MB/s! ) for the same transfers.

Hardware and Software details given below.

Have you seen this behaviour? Can you recommend a resolution?

Best Regards, Sascha

Server: HP DL380 Gen8, 128GB RAM, XEON E5-2630 @ 2.3ghz (2 CPU)
OS: Server 2012R2 (patchlevel 03/06/2014 via Windows Update Service)
FC: 2 x Emulex LighPulse HBA 8GB (Driver: 2.74.214.4) with MPIO
NIC: HP NC523SFP 10Gb 2port (Driver: 5.2.2.412 Teamed LACP)

SAN: Infortrend 24F-R2840-4 and NexSan E48


Hyper-V WIndows Server 2012 R2 event ID 157 Disk x has been surprise removed using windows backup

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I've found a few postings on Event ID 157 for Windows 2012 R2, but no answers

We've upgraded from Server 2012 to 2012 R2. Hyper-V Role. Event ID 157 occurs when Windows Backup is running to backup Hyper-V machines. People have reported the same issue I am having. They have ID 157 occurring only during the Windows Backup process or if they use VSS Snapshots to backup hyper-v virtual machines.

I've found event ID 157 was designed for 2012 R2 Storage Groups when a disk is removed, so it seems like it is a bug showing up during Windows Backup.

One time (out of about 10 now - once each day) that this event was logged, a software RESET was sent to the LSI Mega Raid controller for half of the array and consistency checks were immediately done. I hope this does not happen again.

Everything worked fine before we moved from 2012 to 2012 R2. I've done a clean install and it still happens.

I've looked through the event logs on the virtual machines and we have one Windows 2008 Server running SQL 2008 R2 and it chokes through the entire backup process with hundreds of errors, starting with the SQL VSS Writer receiving a command that it does not understand. From then onward it says tables and data are corrupt, but the normal SQL maintenance job we have running for SQL Server backs up the databases and performs consistenacy checks without issues.

I've just remove the SQL Server from the Windows Backup and will see how it goes tonight.

In case this is related to the SQL Server, here's the error that is 1st logged as soon as the Windows Backup on the host begins:

Event ID 513, CAPI2, Error, Cruptographic Services failed while processing the OnIdentity() call in the System Writer Object.

Details: AddCoreCsiFiles: BeginFileEnumeratrion() failed.

System Error: Access is denied.

After that it freezes the databases, gives dozens of errors for each table, and then restores each table to normal operation.

The Guest SQL server appears to always be the 1st VM to get backed up, so I doubt this has anything to do with it, but thought I should provide as many details as possible, especially when everyone else has discovered it is VSS related and this guest is reporting VSS errors.

What do you think?
thanks
John
P.S. there are no hard drive errors, so running check disk will not help.

Backup and Restore VM

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I have a host server that has a C: drive and a D: drive. Right now I only have one VM running and it is located on the D: drive. I need to reformat the disk that the D: drive is on. For some reason it was created as a MBR type disk and I need to delete it and recreate it as a GPT disk so that I can extend the D: partition beyond 2TB. So, what is the best way to backup and restore the existing VM in this case?

Hyper-V 2012 redundancy questions

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Let me start by saying I have Microsoft SQL failover cluster experience.  I also have built 3 Hyper V servers and used them for a while, but I still consider myself relatively new to virtualization.

I need to go beyond single servers and add redundancy into a new deployment.  This will be a big deployment.

I will be using an Equallogic array as a type of SAN architecture for the back end, on 10GIG SFP switches.

I'm building two identical servers for a front end HyperV server.  I'm looking for an active/passive type scenario where if one server fails, the other pick up seamlessly, but they use the same back end data store.

I have enough IOPS and space, and front end server power (processors and 512GB memory) to create 25 virtual servers, then a second front end server just for fail over.

I know HyperV 2012 has new features like a HyperV replica, but I think for my scenario I still need to build a HyperV cluster.  Can anyone confirm? 

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