Hyper-V failover fails for some virtual machines on replica server

I have a simple setup for Hyper-V replication. Primary server is "Server1" and replication server is "Server2". Four VMs are replication to Server 2, the replication is successful, the machine are replicating and changes are updates in
the replica server.

My issue is that two of these VMs fails when executing a failover or test failover with the error:
"Hyper-V failed to enable test failover for ‘VM1’. The system cannot find the file specified. (0x80070002). (Virtual Machine ID….)" "Replication operation for virtual machine’VM1′ failed: The system cannot find the file specified. (0x80070002)….."

The two VMs replicas that fail were created the same way as the other two that work without problems. One thing i noticed is that when the replica is created for "VM1" there is always an error event related to Hyper-V-VMM:
"Failed to load Hyper-V state for virtual machine ‘VM1’ from the configuration: The device is not ready. (0x80070015).(Virtual machine ID ….). Hyper-V may not work properly. An attempt to reload the configuration will be made in a few minutes."

Have anyone faced this issue before?



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Top 20 articles for vSAN, December 2019

Status of TLSv1.1/1.2 Enablement and TLSv1.0 Disablement across VMware products Thick-provisioned VMs on vSAN detected on vSAN-health check “Host cannot communicate with all other nodes in vSAN enabled cluster” error vSAN Health Service - Online Health - Controller Utility Is Installed on Host vSAN Health Service - Limits Health - After one additional host failure

The post Top 20 articles for vSAN, December 2019 appeared first on VMware Support Insider.

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Top 20 articles for NSX, December 2019

Status of TLSv1.1/1.2 Enablement and TLSv1.0 Disablement across VMware products Guest Introspection status reports “Warning: Guest Introspection service not ready” vCenter Server or Platform Services Controller certificate validation error for external VMware Solutions in vSphere 6.0 NSX-T admin password expired “The pending transaction requires xxx MB free space” error when installing VIBs  “No NSX Managers

The post Top 20 articles for NSX, December 2019 appeared first on VMware Support Insider.

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Top 20 articles for vSphere, December 2019

Workaround for OpenSLP security vulnerability in ESXi 6.x (CVE-2019-5544) Restarting the Management agents in ESXi Transferring files through vSphere Client might fail “503 service unavailable” error when connecting to the vCenter Server using the vSphere Web Client How to reset the lost or forgotten root password in vCenter Server Appliance 6.5 & 6.7 Excessive Hardware

The post Top 20 articles for vSphere, December 2019 appeared first on VMware Support Insider.

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The boot loader did not load an operating system.

My VM is installed and running but when I connect, I get the error that it didn’t load an OS. "No operating system was loaded. Your virtual machine may be configured incorrectly. Exit and re-configure your VM or click restart to retry the current boot
sequence again."

I downloaded a Win XP iso and used it during the initial creation of the VM. In the Firmware setting, the DVD Drive is pointed to the Win XP iso on my host PC’s C: drive.

I never got the Wizard I’ve seen described, so I don’t know what other configurations were possible.

How can I get up and running?

Side note: I tried 10-15 times to install a VM but always got out of memory messages (failure). Getting this one installed felt like a fluke.

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The boot loader did not load an operating system.

My VM is installed and running but when I connect, I get the error that it didn’t load an OS. "No operating system was loaded. Your virtual machine may be configured incorrectly. Exit and re-configure your VM or click restart to retry the current boot
sequence again."

I downloaded a Win XP iso and used it during the initial creation of the VM. In the Firmware setting, the DVD Drive is pointed to the Win XP iso on my host PC’s C: drive.

I never got the Wizard I’ve seen described, so I don’t know what other configurations were possible.

How can I get up and running?

Side note: I tried 10-15 times to install a VM but always got out of memory messages (failure). Getting this one installed felt like a fluke.

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New KB articles published for the week ending 5th January,2020

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VMware NSX-T Data Center NSX-T alarms triggered by an Edge reboot do not automatically resolve Published Date:03-01-2020 VMware vCloud Director for Service Provider Unable to import or deploy VMs that use “Reserve all guest memory (All Locked)” Published Date:03-01-2020 VMware vRealize Operations vRealize Operations for Horizon Broker Agent Cannot Connect to View API Published Date:02-01-2020

The post New KB articles published for the week ending 5th January,2020 appeared first on VMware Support Insider.

Transforming the Customer Support Experience in 2019 – Year in Review

As we launch into the year 2020, it’s important to reflect on the past year. Before we jump into the new year, I wanted to reflect upon last year, and the many accomplishments VMware has made to transform the customer support experience. With that said, and without further ado, let’s reflect upon 2019.   2019

The post Transforming the Customer Support Experience in 2019 - Year in Review appeared first on VMware Support Insider.

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Default Switch failing after windows update

Hi all,

I am running a VM on Hyper-V on my HP Z-Book and has been running fine until I did a Win 10 upgrade. Now when my Pc boots up the Hyper-V default switch continually drops in / out with "Attempting to Authenticate" which seemingly fails, then flicks
to a disabled state and dissapears and then just continues to do this.

I have tried all sorts of troubleshooting including uninstalling Hyper-V multiple times, reinstalling my laptop nic drivers multiple times, and performing Network resets. Nothing has fixed it. Sometimes it will also cause my laptop NIC to do the same thing,
but if I stop the Hyper-V service my laptop NIC stays connected and doing a network reset fixes it. I am real noob when it comes to network stuff, so any thoughts or help would be greatly appreciated.

thanks heaps

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Degraded performance with Core scheduler

Hi.

Since Core scheduler is now the default in WS2019/Hyper-V Server 2019, we’re now evaluating the impacts of this change.

I (think I) understand the implications of the Core scheduler, but from our testing, it’s severely degrading performance even in scenarios where it (in my opinion) shouldn’t.

Testing scenario: Dell PE R740xd with Xeon 6244 Gold (2 CPUs, 8 physical cores, HT enabled), Hyper-V Server 2019 installed with updates up to 2019-11 (since I couldn’t install 2019-12 CU on ANY Hyper-V Server 2019 host). Single testing VM running on the
host:

 - WS201 Standard, 4 vCPUs, 2-8GB vRAM (dynamic), VM config version 9, HWThreadCountPerCore=0 (ie. SMT enabled, default on 2019)

We’re seeing degraded CPU performance in the VM under Core scheduler. I thought that Core scheduler would be limiting VM density (and therefore performance), but only in situations where there are many VMs (vCPUs) running/assigned on the host.

We tested synthetic performance with Passmark PerformanceTest8 and Geekbench5.

Here’s a comparison (the only change is the scheduler used, nothing else is modified):

Passmark

Geekbench:

Is anyone else seeing similar behavior? Is this expected?

If this is expected even in a scenario like this (single/few VMs), then we’ll be forced to switch to classic scheduler for the time being.

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