Hello,

I'm not sure that this is the right forum to ask this, but here goes:

I have a Hyper-V machine that when I attempt to create a snapshot, it gives me this error:

The snapshot appears in my list:

But, the name that I gave it (ddd) does not appear.

Any ideas what might be causing this?

- Bruce

Bruce

Bruce

I have a DPM 2012 SP1 server backing up VMs from a 2008R2 host.  I have a Dell PS4100 SAN.  Latest HIT and Microsoft ISCI client 3.3 on the host.

Backups fail and i get:

Starting synchronization on \Backup Using Child Partition Snapshot\server failed:
Error 30290: Failure occurred while adding one or more of the volumes involved in backup operation to snapshot set. Please check the event log on Hxxx.yyy.zzz  to troubleshoot the issue.
Error details: Internal error code: 0x809909E2
Recommended action: Check recent records from the VolSnap source in the Application Event Log to find out why the problem occurred.

I can force them to use software VSS and i ca get a backup.  I found this KB

http://support.microsoft.com/kb/2761897

Option Two:

One the Hyper-V server(s) involved, remove the iSCSI Target Storage Provider (VSD and VSS) by using the Add Roles and Features Wizard.  It is a Role under the File And Storage Services/File and iSCSI Services area.

Problem _ there is no such setting (perhaps its only for 2008?>

I have the http://www.microsoft.com/en-us/download/details.aspx?id=19867 iSCI target install and when I vssadmin list providers I see the software VSS, the Dell EQ HQ and the target VSS provider.

Not sure what else to try.

OK, so it would seem that there would be a wealth of info from people doing this but I cant seem to find it or Im doing something wrong.

What I want:

I have a server that is running win server 2012 w/ 5 static ip's going to it. I want to install hyper-v and run a few vm's off of it all with there own static ip address. 

What I've done:

I've installed hyper-v. It created a vNIC allocating all of the ips that were on the actual NIC from the beginning. I added a VM directing it towards the vNIC that was auto created when installing hyper-v. But I get network to the host but can not get network to the VM.

Any help would be well appreciated!

I'm new to Hyper-V, so it will be difficult for me to describe the problem. But i'll try to :)

There's Server 2012 with 2 NICs: one looking to lan, another is connected to ADSL modem. RRAS is already configured on the server, with Remote Router interface (on-demand PPPoE connection). Everything works fine: lan clients have access to internet through the server. Now we are installing Hyper-V. To give access from VMs to lan and Internet we have to add External Virtual Switch over the NIC, which looks into lan, yes? But in that case client computers from local network do not have access to Internet.

Any ideas?

Hi All,

As we all know in vmware v center multiple administrators can login at the same time and manage VM's independently . I would like to know how can this be accomplished  in Hyper v?

Thanks in advance

Hello Experts !

I have one basic question regarding mapping multiple physical hard disks under same SCSI controller in a Hyper-V guests. 

I encountered an error, while trying to add multiple physical hard disks under same SCSI controller. I am providing the error as screenshot below. Interestingly, if multiple physical hard disks are mapped under one unique SCSI controller no such error was seen. I found there are only 64 (0 to 63) SCSI controller IDs. That means i can only manage to introduce 64 Physical Hard Disks per Hyper-V guests which appears to me as limitation. In normal windows, under a single target 255 LUNs can be mapped is the same thing no feasible in Hyper-V guests ? Please reply. I hope i am able to make you understand the issue i am seeing. Or in simple words, what i am trying to achieve is, adding multiple physical hard disks under one SCSI controller possibly 255 Physical Hard Disks under one SCSI controller.  I have tried the scenario in Windows 2008 R2 SP1  Windows 2012 RTM release server. Thanks. Appreciate your response. - Nip

I've been having a hell of a time setting up a network for a vm - My server has a quad port network port where two nic ports are bonded and another ive setup to handle hyper-v network flow. At first I tried to create an external adapter from the bonded adapter but I could only get local network. I'm trying through the dedicated adapter I setup but I cant even get a local network. My goal in all this is to let the vm's talk to the outside world and connect to the internet.

Here is what I'm working with:

Host Adapters:

adapter that was created from vm

How The above network is setup:

http://i.imgur.com/ggKlDUr.png

Lastly the VM

http://i.imgur.com/4LQqU9s.png

This probably seems all confusing and I'd be willing to start all over but I could use some help. Its being hosted at a datacenter and we were given the subnet 192.168.111.xx for our servers. Thank You for any help.

I am experiencing an issue when I removed the Wireless device and then re-installed it on Hyper-V Windows 8.

The error states : "Failed while modifying virtual Ethernet Switch connection settings" followed by "Ethernet port {f...} bind failed unspecified error (0x80004005)"

Is anyone else experiencing this kind of issue?

Hi guys I'm looking to setup a Hyper -V environment containing a domain controller which will have WDS/DHCP/DNS server which is completely private of the Host Domain.

The Host is not on the domain but has a static IP with DNS pointing to our network.

My Virtual DC and clients can communicate together using a "private virtual machine network" however they do not have access to the internet.

I don't want to assign a internal network as that then allows the Virtual DC and client see our HOST Domain. (Can ping the domain name as DNS is on the HOST Server.)

Any one have any ideas how I can route only internet to the vm's without them seeing the host domain or even the domain seeing those Virtual clients?

I understand External network will provide full visibility to the domain

Internal will allow visibility via the HOST Server (which is off the domain) but DNS will allow visibility to the network?

Private is completely private which is ideal but no internet access :(

any ideas please

Hi all,

I am looking at an alternative to Citrix ZenDesktop. Basically I need to make VM available to a group of users. ZenDesktop does that with a nice presentation interface. (Web-=services).

I have been told to look at the new features withing Hyper-V in 2012 and VDI. But I can not find the integration between setting up the VMs on Hyper-v and the way to present/deliver them to users (without requiring the traditional RDP).

Wonder if you can give some guide lines on this so I can go and explore it more

Hi guys,

I would like to know whether my expectations from Failover Clustering in Hyper-V are still relevant or not. Below are my expectations:

1) When 1 of the node is powered off (unexpected shutdown), the VMs in the node will still accessible from the end user without any interruption, while migrating to the partner node in the cluster.

2) If the management network cable is unplugged from a node, will the VM in the node migrate to the partner node?

Please let me know whether is my expectations are relevant with Failover Cluster in Hyper-V. Thanks for your assistance.

Regards,

Ridhuan

Hello, I have 2 Servers running 2012 Data Center edition; Hyper-V Hosts clustered with CSV.  I have 10 NICS in each server.  I have teamed 2 Nics in each teamed as Host01 and Host02 teams.  I created a team with 4 Nics called Guest Team 1 and another as guest team 2. All teams are Switch independent and default. 

When I select the option for the host to use the Guest Teams, I get a new Network adapter called vEthernet multiplexer driver2.  I add an IP address to this new adapter and everything is great.  However, when I went to ping the Host 1 server a couple of days later, it no longer had the IP Address that was assigned. It took over the IP address of Guest Team 1.,  Then later on, it had the other guest team IP.  I went in an un-selected the option for the Host to use the Guest Team and the vEthernet Nic is gone.  

I assume that since the Guest VSwitch named Guest Team 1 is setup for my guests that they can still communicate through this switch using the IP address on each of the guest VM's.

I now have no place to add the IP address for the guest teams, and it seems like the host team is slammed with network traffic.  I really liked having the vEthernet NICS in place as the Live Migrations seems to be much faster with that setup.  Any ideas on how to keep the vEthernet Nics for the guests while keeping the host IP in place?

Am I doing anything wrong with this?

Thank You 

Hello Everyone,

You will have to excuse me as I'm kind of Hyper-V stupid.  I just started using Windows 8 Enterprise and playing with VMs myself.  I love it.  On my primary machine I made a backup of a hyper-V windows 7 VM.  Now I can surf around, do stupid things, and if my VM gets trashed, delete it and add the base back.  That is my GOOD experience where I have control over things.  Now for the question from my BAD experience:

We moved our local servers to a cloud based service company several months ago.  The theory is that we are completely mobile now and users can connect using their laptops from wherever.  At first, it worked great, but about 5 weeks ago we started seeing our system slow to a crawl once or more times a day.  Our setup:

- 1 file, DNS, RRAS, AD server (4 cores/8GB)
- 2 dedicated workstations (2cores/4GB each)
- 1 RDP server (8 cores/16GB)

Now what happens:

Systems run for awhile and then gets SLOW!!!  1 minute to click on START, 5 minutes to open a file, etc.  I've checked the following:

- RAM - All systems have 50-90% available RAM
- CPU - CPUs idling at 0-15% (mostly from task manager & resource monitor)
- Processes - There are no bloated processes (biggest taking under 200MB)
- Processes - There are no processes pulling major CPU cycles
- Current Disk queue length goes between .01 and 1 (when it hits 1 or above and stays there, the system SLOWS down) I've seen it jump to 5 and 50 as well

Rebooting the server sometimes helps, but recently, after the reboot, things are worse than they were before the reboot and stay that way for 30 minutes to over an hour.

A note, and I'm not sure how to describe this, so I'm going to tell you how I get there:

- Go into resource monitor
- Select the Disk tab
- Click on the Disk Activity Section
- In the Disk Activity section, there are two colored boxes "Disk I/O" and "Highest Active Time"

When nothing is responding and the Disk Queue Length is stuck at 1 or above, The disk I/O sits at 0 for long periods of time and then after multiple minutes of sitting at 0, it will jump up to multiple MB/sec and the disk queue length will go down for a couple of seconds and then it will spike back up and the Disk I/O box will stay at 0 again for several minutes.  On my home computer running hyper-V, this disk activity box is constantly showing Disk I/O and my queue length seldom spikes and stays at a high level.

Does anyone have any ideas?  Anything I can ask the support guys to check into?  Anything I can do to collect information?  I'm stumped.  I just found out today that they were running a Hyper-V based system and have little or no access to configuration, etc. They are sure it's us.  So far, I've:

- Removed anti-virus from our main server
- Disabled a service called PeachtreeSmartPosting because it was having errors (I think the errors are caused by the slowdown, they thought the slowdown was caused by the errors. I disabled the smartposting service and our server still went into it's death spiral today)
- Removed Windows Search Service
- Rummaged through our event viewer: Some Disk errors under the system log: The driver disabled the write cache on device \Device\Harddisk0\DR0 

and

some ESENT/Performance errors under the application log: (x): A request to write to the file <y> at offset ... succeeded, but took an abnormally long time (<some large value> seconds) to be serviced by the OS. This problem is likely due to faulty hardware.  Where the variable x is wuaueng.dll, svchost, Windows, and possibly others and variable y is datastore.edb, j50.chk, j50tmp.log, dhcp.mdb, edbtmp.log, edb.log, j500134D.log (in dhcp\backup\temp), MSS.log, windows.edb, and others.  I pulled the variables from the last 20 or so of these errors.  In addition, between every 20 or 30 of the above errors, I get something like this:

DFSRs (1928) \\.\C:\System Volume Information\DFSR\database_28A4_16A0_A416_7094\dfsr.db: A request to write to the file "\\.\C:\System Volume Information\DFSR\database_28A4_16A0_A416_7094\fsr.log" at offset 4155904 (0x00000000003f6a00) for 262656 (0x00040200) bytes succeeded, but took an abnormally long time (64 seconds) to be serviced by the OS. This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem.

I've got no clue where to go next, and I think the support staff running this are just as baffled.  Any thoughts, suggestions, etc. would be appreciated.

Thanks,

Jeff

Michael T. Glenn

My Hyper-V 2012 host has 2 physical NICs.  I have one NIC configured for management only, and the other NIC configured for VM traffic.  I created 2 External virtual switches, one bound to the  management NIC, the other bound to the VM NIC.

When I look in Network and Sharing Center I only see:

vSwitch for the Management NIC

vEthernet for the Management NIC

vSwitch for the VM NIC

I don't see a vEthernet for the VM NIC.  Shouldn't there be one for the VM NIC too? Is this a change from Hyper-V 2008?  Most of my VMs seem to work ok, but one in particular is not seeing the Hyper-V host, and I've been trying to troubleshoot but haven't figured out why.  I wondered if not seeing the vEthernet for the VM NIC is the cause.

I have a domain-registered clustered Windows 2012 Hyper-V server group with three servers.  They have a hardware based iSCSI connect to a shared LUNS.  After working perfectly for over six months, the Live migration suddenly stopped working yesterday with the following error:

Live migration of 'Virtual Machine VSVR-xxx' failed.
Virtual machine migration operation for 'VSVR-xxx' failed at migration source 'SVR-xx'. (Virtual machine ID xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
Planned virtual machine creation failed for virtual machine 'VSVR-FTP': An existing connection was forcibly closed by the remote host. (0x80072746). (Virtual Machine ID xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).
Failed to receive data for a Virtual Machine migration: An existing connection was forcibly closed by the remote host. (0x80072746).

The Quick Migration still works.  I have no idea what went wrong or what changed.  The servers and the cluster still seam to be registered with the domain controller.  Sense this is classified as a development server we don't take backups.  I would like to try to fix it before I go to the time to completely rebuild the cluster.

Does anyone have an idea what went wrong and how to fix the live migration?

Regards

Windows 2012 and the new VHDX format are stated to have full support for native 4k sector drives.

However if I create a VHDX file on hyper-v 2012 with native 4k (logical + physical sector sizes set to 4k), a windows 2012 Standard guest OS will not install, it gives the error:

Windows cannot be installed to this disk.

This computer's hardware may not support booting to this disk.

Ensure that the disk controller is enabled in the computer's BIOS menu.

however if I set it to a 512e VHDX where the logical sector size is 512k but the physical is 4k then it works fine.

... is the issue that the IDE controller in hyper-v 2012 doesn't support 4k sector drives?

I have read there is a negative performance impact when using 512e so I was hoping to take full advantage of Windows 2012 and native 4k sector drives.

thanks

Goal: automatic failover to replicated/identical VM on a different server.

Challenge: I don't have the resources to create a forward facing cluster for VM's with backend shared storage.

What I do have are 2 Intel based servers, one to use as primary one to use as failover.

So first of all can I get hot failover with the resources I have?

Live migration (shared nothing), from my reading seems to only move when you intenionally migrate storage and running apps using live migration manually. The replica technology keeps a somewhat up to date, ready to fire up image on another server, but failover has to be handled manually with vm shutdown.

Is there a simple way to achive the goal above? Perhaps a combination of replica and live migration so the image is there and almost live and the live migration can just "catch up" or fail-over?

Thanks

Lee

I am seeing some odd layer 2 (Ethernet) packet behavior with a Hyper-V VSwitch, and I am curious whether anyone has seen this before.  It appears to me that TCP traffic originating in a VM is tagged with the source MAC address of the physical adapter over which it flows out of the Hyper-V VSwitch, while ICMP traffic is tagged with the source MAC of the VM.

First, let me explain my configuration:

VM -> External VSwitch -> Windows LACP Team (4x NIC) -> Switch -> Internet Router

I have a server connected via an Intel quad-port server NIC to a switch configured using the built-in Windows teaming, set up in LACP mode using Address Hash.  I have a VM running on the server that needs to access the internet via the router, which is running NAT.

Now, when I attempt to ping an internet server (say www.google.com), I see packets sourced from the VM's IP passing through the router with source MACs of 00:15:5d:09:01:01.

However, if I try a TCP connection (say a browser connection to www.google.com), I see packets sourced from the VM's IP with source MAC a0:36:9f:04:c8:a3.

When the internet host sends traffic back to the VM, the router properly tags the destination MAC as 00:15:5d:09:01:01.

Now, as the switch I'm using uses either a MAC or MAC/IP hash to manage LACP flows, this results in VM's being able to ping internet hosts, but not connect to them via HTTP.  I believe the LACP hash in the switch is getting very confused, as the flow one direction has one source MAC, and a different destination MAC when coming the other direction.  Very, very strange behavior.  In my mind, both the ICMP and TCP packets should both have the VM's MAC as the source MAC.

I'm new to both Server and Hyper-V 2012, so feel free to correct me if I have something misconfigured.  However, I haven't seen anything even remotely resembling this sort of granularity/detail in the Virtual Switch configuration dialogs.

Is this a known issue, and if so, is there some sort of workaround?  I'd like to have a configuration where all packets sourced from a VM use the VM's MAC, not the NIC's.

I'm also wondering if this is somehow VMQ related?  I haven't tried SR-IOV either, as my understanding is that a VSwtich cannot use SR-IOV if it is sitting on top of a team.  Is that correct?

(and yes, the obvious thing to do is get a switch which does IP or IP/Port hashing only and ignores the MAC, but that's not an easy thing to do.  Would be far easier to "fix it in software".)

Appreciate any thoughts.

Thanks,

Michael Menefee

I'm wondering if its possible to have a multi tenant replica node.

By this I mean my clients use server 2012 Hyper V, and setup a replica to a 2012 host in my datacentre, so that should anything happen to their host, we can failover to the replica at my datacentre, but I only want one host to host all of the replicas for my clients who may have more than one VM to replicate but have it in a multi tenancy configuration so that all of my clients networks are separate.

Is this possible at all? would they need a site to site VPN to replicate to my host?