Are you the publisher? Claim or contact us about this channel

Embed this content in your HTML


Report adult content:

click to rate:

Account: (login)

More Channels

Channel Catalog

Channel Description:

Discussion of Hyper-V

(Page 1) | 2 | 3 | .... | 761 | newer

    0 0

    I'm attempting to install SLES 11 SP2 as a guest on on Hyper-V (Windows Server 2008 R2). I've created a 40GB ide drive in hyper-v manager for this install and assigned 4gb of RAM to the guest. When the install process attempts to format the drive, it just hangs at 98% and I have to shut down the guest. I've searched quite a bit but couldn't find anything. Any help or pointers would be appreciated.



    0 0


    I have a very puzzling situation , and was wondering if anyone could point in me in the right direction.

    I installed a new dual port network adaptor into me M610 blade server yesterday. I had a few issues with the drivers and had to perform a devcon.exe /remote of the network cards to force a re-install.

    All of the network cards came back , i reconfigured and re-attached iSCSI and fired up Hyper-V manager from my desktop.

    When i went to start a VM it complained about the VHD for the specified VM was missing, so I connected to my server core installation to check this was the case and to my utter shock the VHD folder i created (which contains my VHD's on the LUN) was missing! 

    I did not delete the folder, but have a suspicion the folder is just hidden for some reason, can anyone shed any light?


    0 0

    I have a couple of vhdx files on a 2012 RC host.

    One had deduplication run in the guest which cut down the used space from 250 gb to 125 gb.  Compacting it ends in 3 seconds and it doesn't shrink at all, stays at 275 gb.

    Another is just a standard vhdx from another guest that has 30 gb of used space, but the vhdx is 39gb.  Compacting also ends immediately with no shrink.

    Is compacting broken in rc?

    0 0



    2 node cluster with a MD3000i as backend storage. Dell PE905 AMD procs and 32 Gigs Mem a piece

    Networks as follows  (4 Ports per Host Broadcom with latest Driver and firmware) TOE and iSCSI TOE disabled

    Mgmt /w VM traffic


    Last 2 network ports are SCSI network.

    Problem I am seeing is that Quick Migration works fine, 30 seconds to 1 minute time. Live Migration takes 35 to 40 minutes. It starts and hits 10% immediately and crawls 16% 18%. It will eventually Live Migrate but extremely slow. Testing I have adjusted binding order around, always keeping iSCSI on the bottom. Checked the Cluster networks, Mgmt allow vm traffic and cluster access, CSV allow cluster access only and iSCSI no cluster access. There are no apparent errors in the system event logs or application logs. We are in the process of updating bios and some other firmwares on the servers.

    Seems to me as if the initial copy of the VM occurs, the Memory/CPU transfer seems to hang things up. Has this been seen on the MS side and or am I missing a hotfix that might resolve this?

    0 0

    Hi all,

    I've got a bit of a strange problem. DPM 'suddenly' stopped backing up all VM's on a single node of the Hyper-V cluster, and they all fail with the same errors (will be listed below). The DPM server has been backing up ALL VM's for atleast 3 months now, with no problems but the occasional (resolvable) failure.

    The event that most likely caused the problem might have been the complete network failure of our office. Previous wednesday all of our switches went down, but within 2 hours all was operational again.

    The next day, ALL VM's on the node 3 (of 6) failed the nightly backups. Consistency checks continue the fail no matter what I've tried.

    Can anyone point me in the right direction? Below is a summary of what info I can provide atm:

    Cluster consists of 6 hosts, hosting ~50VM’s.
    Hyper-V CSV Serialization is in place.
    All Backups worked consistently for all VM’s for atleast 3 months (didn’t work here before then)
    All network connectivity was lost (switch stack failure).
    All is operational +- 2 hours later, but now only the VM’s on host 3 fail (all other VM’s on other hosts backup just fine).

    ACTIONS (which failed):

    Perform Consistency Check
    Delete VM from PG, Re-Add, Perform Consistency Check
    Delete VM from PG, Delete Inactive Protection, Re-Add, Perform Consistency Check
    Reinstalled “Hyper-V Integration Services” , Perform Consistency Check, Delete VM from PG, Delete Inactive Protection, Re-Add, Perform Consistency Check
    (Re)Registered Hyper-V VSS Writers,            ,,                               ,,
    Restarted Services,     ,,                                      ,,
    Defragmented Disk,     ,,                                     ,,
    Some more less constructive 'solutions' from the interwebs

    Error message on DPM_SRVR:

    DPM failed to synchronize changes for Microsoft Hyper-V \Backup Using Child Partition Snapshot\VM_MACHINE on SCVMM VM_MACHINE Resources.*.*.* because the snapshot volume did not have sufficient storage space to hold the churn on the protected computer (ID 30115 Details: VssError:Insufficient storage available to create either the shadow copy storage file or other shadow copy data. (0x8004231F))

    Informative messages on VM_MACHINE:

    The VSS service is shutting down due to idle timeout.

    Error message on CLUSTER_NODE_03:

    calculateReserveSize(): The vdisk doesn't have sufficient space to create snap pool:array id=(long_id_number)

    Any help would be appriciated, to me it looks like an issue between the node and the VM's, because the VM has no errors, just the 'VSS idle timeout' message.

    0 0

    how to install an Active Directory and TFS in a single server? is it possible to run these in the same machine simultaneously? we have bought a Server 2008 R2 Standard edition. Is there a limitation of installing server roles in Standard edition? can I install more server roles even if I have install the Hyper-V role?

    0 0


    following the guidance in this article I wanted to enable the "Interrupt Coalescing". However it seems I'll be significantly reducing the number of RSS Processors. I was wondering if the performance benefit is truly worth the effort...

    Currently I have MaxRssProcessors configured to 16 (default registry key value on my host), I also have 8 Adapters I need to enable VMQ for and have 32 Logical Processors.

    With the logic described in the article I would need to spread 32 cores across 8 adapters so that would make the following config I presume:

    MaxRssProcessors = 4

    RssBaseProcNumber 0
    RssBaseProcNumber 4
    RssBaseProcNumber 8
    RssBaseProcNumber 12
    RssBaseProcNumber 16
    RssBaseProcNumber 20
    RssBaseProcNumber 24
    RssBaseProcNumber 28

    If I have adapters that are going to be utilized more heavily then others, for example the TRUNKED adapters, would it make sense to increase MaxRssProcessors for that adapter and reduce it for the others?

    or am I simply not grasping the concept of this  ;-)

    Tonino Bruno

    0 0

    Hi folks

    Just to confirm something I see on my server - I have three Windows Server 2008 guests, one Windows XP SP3 guest, one Windows Server 2003 SP2 guest and one CentOS guest (running trixbox).

    When I run Windows Backup (and now Symantec Backup Exec System Restore) I've noticed that all VMs, except the Windows Server 2008 guests would be SAVEd for the VSS snapshot, and resumed immediately after. This generaly takes about ten seconds.

    Seeing that I have Integration Services installed on that Windows XP SP3 and Windows Server 2003 SP2 VMs, I was expecting these to continue running.

    Am I right assuming that those OS will not support the VSS snapshot and will always be saved at the start of backups?

    Mauricio Freitas

    0 0

    I've got a couple hyper-v deployments coming up. As a "visual" kind of guy, I would *love* to have a tool where I can plug in things like number/capacity of physical disks, amount of ram, what vm's I need to deploy (AD DS, RDS, etc.), and automagically get a diagram of the virtual environment, suggestions on how to slice up the storage, what raid levels to use, what partitions to use, what vm's to put on which partitions, virtual networking suggestions, etc etc.

    Don't suppose there's something out there like that?

    Bill Hagen, Owner That Computer Geek Newberg, OR

    0 0

    I have installed Hyper-V Server 2008 R2 with 2 Child Partitions as Server 2008 R2 and Server 2008 SP2 x32bit.  The Hyper-V Server installs an External Virtual Network by default and when I installed the 2 child partitions I used the default external virtual adapter instead of creating a new one.  Do I need to create a new one for these 2 child partitions.  I have 2 NIC cards installed on this server.  What is the purpose of creating a new external virtual network if I need to create one.

    Thanks in Advance

    0 0

    I have one Hyper-V server with 4 physical NICs in it. I have one VM that I need to put in my DMZ and 3 that are on my local LAN. Everything seems to be working correctly, except that I have cannot connect externally to the server that is in the DMZ. All the necessary firewall ports are open and the Windows firewall on the server itself is turned off. I have to think that I don't have something configured correctly with Hyper-V. I have created an External Network for the NIC that is plugged into the DMZ and pointed the guest OS to use that Virtual Network. What am I missing? I am sure I have not posted enough here to answer this, but if someone can provide me a list of questions, I'd be happy to answer them to help get to the bottom of this.



    0 0


    I am running to VM on a hyper V core server, with each vm having to vhd attached.

    when i backup the vm's with windows server backup i get the following errors

    Failed to create the backup of virtual machine 'XXXX'. (Virtual machine ID C7F4273C-DD22-473D-B907-C9ADA592DC76) Event ID 10102

    Failed to change state of virtual machine 'XXX'. (Virtual machine ID C7F4273C-DD22-473D-B907-C9ADA592DC76) Event ID 10101

    I have narrowed it down to this vm with the 2nd vhd attached. if i dettached of the vm and start the servers then all backups well.

    it point to a snapshot some where but i dont have one.

    Also the event viewer giving the following errors


    Performance counters for the WmiApRpl (WmiApRpl) service were removed successfully. The Record Data contains the new values of the system Last Counter and Last Help registry entries.

    LoadPerf 1001

    Revert operation for volume \\?\Volume{4b5154db-a880-11e0-883a-78e7d1627811}\ has begun.  Volume is being reverted to the shadow copy with id {483a9d78-6e0b-4bea-9e43-bd8fbcae87cd}.

       Revert a Shadow Copy

       Execution Context: Coordinator VSS
    ID 12322


      - Provider

       [ Name]  VSS
      - EventID 12322

       [ Qualifiers]  0
       Level 4
       Task 0
       Keywords 0x80000000000000
      - TimeCreated

       [ SystemTime]  2012-07-11T06:04:22.000000000Z
       EventRecordID 74634
       Channel Application
       Computer UOSHYPERVSRV.UOSDMN.local

    - EventData

       Operation: Revert a Shadow Copy Context: Execution Context: Coordinator

    The backup operation that started at '‎2012‎-‎07‎-‎11T06:03:17.306000000Z' has failed because the Volume Shadow Copy Service operation to create a shadow copy of the volumes being backed up failed with following error code '2155348129'. Please review the event details for a solution, and then rerun the backup operation once the issue is resolved.
    Event ID 521

    can somebody please help me fix this vhd as i need to shutdown the vms then start the backup then start then again later.'

    This is becoming a pain.



    Alpha Networks

    0 0

    I have windows 2008 R2 Datacentre running with Hyper-V. A windows 2003 R2 guest VM sometimes has the NIC connectivity drop out, and it seems to become disabled. Has no network connectivity outside. Not sure of cause. If I restart the VM it seems to start working again. Possibly it dies in the middle of large network activity (file backup), but not sure of exact timing yet.

    Didn't notice anything in the event logs. NC on host and other guest VMs still work fine.

    Any ideas? It is not workable if the NIC always dies unexpectedly, and users have no network connectivity to the server.



    0 0

    Can someone tell me if you can use Windows Server 2008 R2 Standard to create virtual servers with Hyper-V and if so how many can be created?

    Thank you,

    Keith Naccarato 845-382-9494 845-389-8352

    0 0

    Hello all,

    i'm planning a storage migration from an older SAN to a new model.

    The SAN's involved in this are both HP, where the older one (and the one it's working right now) its a HP EVA4400, and the new one it's the HP EVA P6300.

    I'm not in here to ask for help about the storage migration, of course, but i'm here to address another issue related with the Hyper-V cluster that seats on top of that SAN to provide VMs and their correspondent vhd.

    What I really need to know it's what things should i consider when migrating the LUN supporting the Quorum disk and the VHDs.

    Can it be simple done, by changing the presentation on the SAN, or must I be aware about other issues (like disk signing and so forth)?

    I appreaciate any help you can give me about this, both from personal experience, or by pinpointing documentation I might be missing.

    than you in advance

    Paulo Marques - Computer Engineer - MCSE

    0 0
  • 07/16/12--18:27: WMI on the Host server
  • Im trying to use WMI to query running VM's

    Get-WMIObject -namespace root\virtualization -class msvm_computersystem

    When running this on the hyper-v host it only returns the name of the Hyperv host server

    If I target a remote server using the -server switch, it lists the host and all the virtual machines.

    How can I get proper information when running this locally on the server?

    0 0


    I have VM host server Intel(R) Xeon (R) CPU 2.13 GHz (2 Processors).

    I want to run 24 VMs simultaneouly. What are the best settings for optimum performance of VMs? (All VMs have equal priority)

    My Current settings.

    Virtual Processors: 1

    Virtual Machine Reserve: 0

    Virtual Machine Limit: 100

    Relative Weight: 100


    I Observed that following perfromance loss when number of VMs increased.

    Number   of VMs Running Simultaneouly 11 VMs 16 VMs 18 VMs 21 VMs
    Time Required in Hrs 97 126 130 150
    % Decrease   Compared to 11 VMs   30% 34% 55%

    Thanks and regards

    Ravindra Gaikwad

    0 0

    Hoping you guys can help me out with a problem that's been bugging us and I
    can't seem to figure out.

    We decided to move ahead with virtualizing all our domain controllers on
    Hyper-V and we've run into some problems.  All Hyper-V hosts are 2008 R2 SP1,
    and all virtual DC's are 2008 R2 SP1 Core.

    Per MS's recommendation, we partially disabled the host time synchronization
    with the guest DC's by disabling the VMIC time provider in the w32time settings
    (reg add
    HKLM\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\VMICTimeProvider /v
    Enabled /t reg_dword /d 0), but leaving the checkbox for "time synchronization"
    checked under integration services in the VM settings.

    MS KB Article:

    We also configured each virtual DC to sync with the same external time source
    via NTP, so they are not following the domain hierarchy but are each reliable
    time sources.

    If I run the command w32tm /query /source, it shows the external NTP server
    as the source as it should.

    However, we believe the guest DC's are still syncing their time with the
    Hyper-V hosts and we can't figure out why.  I tested this by advancing the time
    on a host that has one virtual DC on it, and the guest DC immediately updated
    its time to match the host time.  If I reverse the change on the host, the guest
    DC's time slowly ticks down to match the host time again.

    Is this expected behavior based on our setup, or is there something I'm


    0 0


    We have about 70-80 different offices at different locations. Each location has a HyperV server and 3-4 virtual machines on it. We are not using HyperV Core - It is Enterprise Windows 2008 R2 - Full installation with HyperV Role.

    We need a backup solution which can backup all the data of the host and VM's onto a Tape Library. Many backup solutions (e.g EMC Networker) support HyperV backup however require a separate server. The support matrix does not include Windows 2008 with Hyper as the Storage Server. We cannot buy another server for backup due to cost.

    Any suggestions on some good, cheap backup solution which we can install on HyperV Server?

    We dont intend to use Microsoft DPM.


    Regards, Vik Singh "If this thread answered your question, please click on "Mark as Answer"

    0 0

    Here is my server:

    Dell R815
    Windows Server 2008 R2 Enterprise
    4 x AMD Opteron 6272 which does support SLAT
    256GB RAM
    ATI FirePro V5800 which does support RemoteFX
    RDS RemoteFX and Core Services installed. 

    I added the RemoteFX 3D Video Adapter to the VM in Hyper-V and when I go to boot I get the following error:

    "Microsoft Synthetic 3D Display Controller (Instance ID {113560EA-48CD-4BD1-8828-FCEC44E2B5D5}): Failed to Power on with Error 'Insufficient system resources exist to complete the requested service.' (0x800705AA). (Virtual machine ID 2365CFB4-8281-4E1E-B76C-1CEB672257B5)"

    I have tried this with the RemoteFX Cap Driver enabled and disabled. I followed and verified message text wasn't the issue. I ran across posts talking about the domain minimum password length of 14 characters. Our's is 10 so that didn't help. I also installed KB2523676, no luck. 

    I am out of ideas. 

(Page 1) | 2 | 3 | .... | 761 | newer