Vmware Recovery No Hypervisor Found
Vinay Pettyjohn
Any data processing or storage device can run into problems from time to time, and there could be many reasons for such scenarios to occur. Virtual machines are more flexible to manage and scale, but they are equally complex in their manner of data storage and hosting.
Hypervisors are technological features for virtualizing server environments to allow for the management of the deployed applications and IT infrastructure. There are two general types of hypervisors: Type1 and Type2. Each hypervisor type has specific advantages and is meant for specific applications.
Type 1 hypervisors, or bare-metal hypervisors, run directly on the host machine's physical hardware without loading an underlying OS, and as such they are considered the best type of hypervisors for enterprise environments.
Once a hypervisor is unresponsive or deactivated, you cannot access the VMs running on the virtualized environments the hypervisor was powering. Interestingly, you can fix a failed hypervisor and make it start working again.
This error typically comes up when the system detects that the hypervisor is disabled in the BIOS. But, you must check if this is the case before proceeding. You can check the status of the hypervisor on your PC through the Task Manager.
If you made a backup before facing the hypervisor problem, you can recover your VMs from the backup or snapshot. DiskInternals VMFS Recovery allows you to create disk images of hard drives, which could serve as backup copies you can restore at any time. Backup copies of a VM can serve as cloned VM templates for launching new VMs on new hosts.
VMware hypervisor recovery refers to re-enabling Hyper-V settings on your PC to allow for running virtualized environments. If hypervisor is enabled on your system and your VMware hosts cannot detect it, you can reach out to VMware support or lodge a complaint in the community. If your VM files go missing all of a sudden, you can recover them using DiskInternals VMFS Recovery.
seems that boot device/order is lost for both windows and linux VM when attempting to move them from hyper-v to vmware. anyone seen this or could point me to any documentation about troubleshooting this?
I am checking if this issue has been resolved with support. I do believe we had a similar case and the customer was able to resolve the issue by modifying the VMX file on the failed over VM in the manners specified in this kb article:
It looks like some of you had issues with Hyper-V Gen 1 IDE to VMware. There is a KB article that tells how to change the registry. -base/vm-enters-system-recovery-during-fo-from-hv-to-vc/ We are investigating a warning for this case to better raise this incompatibility to customers.
You can update ESXi hosts by manually downloading the patch ZIP file from the VMware download page and installing the VIBs by using the esxcli software vib update command. Additionally, you can update the system by using the image profile and the esxcli software profile update command.
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Requesting an NMI from the hardware management console (BMC) or by pressing a physical NMI button must cause ESXi hosts to fail with a purple diagnostic screen and dump core. Instead, nothing happens and ESXi continues running.
Windows virtual machines might fail while migrating to a newer version of ESXi after a reboot initiated by the guest OS. You see a MULTIPROCESSOR CONFIGURATION NOT SUPPORTED error message on a blue screen. The fix prevents the x2APIC id field of the guest CPUID to be modified during the migration.
If you run a query to the class VMware_KernelIPv4ProtocolEndpoint by using the CIM client or CLI, the query does not return VMkernel NIC instances. The issue is seen when IP ranges are 128.x.x.x and above.
In ESXi 6.7, notifications for a PDL exit are no longer supported, but the Pluggable Storage Architecture (PSA) might still send notifications to the VMFS layer for such events. This might cause ESXi hosts to fail with a purple diagnostic screen.
If you enable implicit Asymmetric Logical Unit Access (ALUA) for target devices, the action_OnRetryErrors method takes 40 tries to pass I/O requests before dropping a path. If a target is in the process of controller reset, and the time to switch path is greater than the time that the 40 retries take, the path is marked as dead. This can cause All-Paths-Down (APD) for the device.
The +Host.Config.Storage permission is required to create a vSAN datastore by using vCenter Server. This permission provides access to other datastore, managed by the vCenter Server system, including the ability to unmount those datastores.
A shared virtual disk on a vSAN datastore for use in multi-writer mode, such as for Oracle RAC, must be eager zeroed thick-provisioned. However, the vSphere Client does not allow you to provision the virtual disk as eager zeroed thick-provisioned.
You might see an unexpected failover or a blue diagnostic screen when both vSphere FT and a GART are enabled in a guest OS due to a race condition. vSphere FT scans the guest page table to find the dirty pages and generate a bitmap. To avoid a conflict, each vCPU scans a separate range of pages. However, if a GART is also enabled, it might map a guest physical page number (PPN) to an already mapped region. Also, multiple PPNs might be mapped to the same BusMem page number (BPN). This causes two vCPUs to write on the same QWORD in the bitmap when they are processing two PPNs in different regions.
TLS certificates are usually arranged with a signing chain of Root CA, Intermediate CA and then a leaf certificate, where the leaf certificate names a specific server. A vCenter Server system expects the root CA to contain only certificates marked as capable of signing other certificates but does not enforce this requirement. As a result, you can add non-CA leaf certificates to the Root CA list. While previous releases ignore non-CA leaf certificates, ESXi 6.7 Update 3 throws an error for an invalid CA chain and prevents vCenter Server from completing the Add Host workflow.
This issue is resolved in this release. The fix silently discards non-CA certificates instead of throwing an error. There is no security impact from this change. ESXi670-201912001 also adds the configuration options Config.HostAgent.ssl.keyStore.allowSelfSigned, Config.HostAgent.ssl.keyStore.allowAny and Config.HostAgent.ssl.keyStore.discardLeaf to allow customizing the root CA. For more information, see VMware knowledge base article 1038578.
This issue is resolved in this release. With ESXi670-201912001, the output of the QuerychangedDiskAreas () call changes to FileFault and adds the message Change tracking is not active on the disk to provide more details on the issue.
With the fix, you must power on or reconfigure the virtual machine to enable CBT after reverting it to a snapshot and then take a snapshot to make a full backup.
To reconfigure the virtual machine, you must complete the following steps:
ESXi hosts might fail with a purple diagnostic screen during power off or deletion of multiple virtual machines on a vSphere Virtual Volumes datastore. You see a message indicating a PF Exception 14 on the screen. This issue might affect multiple hosts.
When you hot add a device under a PCI hot plug slot that has only PCIe _HPX record settings, some PCIe registers in the hot added device might not be properly set. This results in missing or incorrect PCIe AER register settings. For example, AER driver control or AER mask register might not be initialized.
ESXi670-201912001 implements the UnbindVirtualVolumes () method in batch mode to unbind VMware vSphere Virtual Volumes. Previously, unbinding took one connection per vSphere Virtual Volume. This sometimes led to consuming all available connections to a vStorage APIs for Storage Awareness (VASA) provider and delayed response from or completely failed other API calls.
One or more vSAN objects might become temporarily inaccessible for about 30 seconds during a network partition on a two host vSAN cluster. A rare race condition which might occur when a preferred host goes down causes the problem.
If a stretched cluster has no route for witness traffic, or the firewall settings block port 80 for witness traffic, the vSAN performance service cannot collect performance statistics from the ESXi hosts. When this happens, the performance service health check displays a warning: Hosts Not Contributing Stats.
Adding an ESXi host to an AD domain by using a vSphere Authentication Proxy might fail intermittently with error code 41737, which corresponds to an error message LW_ERROR_KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN.
This issue is resolved in this release. If a host is temporarily unable to find its created machine account in the AD environment, the fix adds a retry logic for adding ESXi hosts to AD domains by using the Authentication Proxy.
In the AMD IOMMU interrupt remapper, IOAPIC interrupts the use of an IRTE index equal to the vector number. In certain cases, a non-IOAPIC interrupt might take the index that an IOAPIC interrupt needs.
With ESXi670-201912001, you can select to disable the Maximum Transmission Unit (MTU) check in the vmxnet3 backend for packet length to not exceed the vNIC MTU. The default behavior is to perform the MTU check. However, if you use vmxnet3, as a result of this check, you might see an increase of dropped packets. For more information, see VMware knowledge base article 75213.
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