XenServer - Overview of Disaster Recovery Options

This article provides an overview of different backup/restore methods available in XenServer for Virtual Machine Metadata. Background Backup/Restore or Site Recover/Disaster Recovery options in XenServer have evolved over recent product versions. This document briefly explains those options...

How to Copy a Virtual Machine From One Storage Repository to Another

This article describes how to copy a virtual machine VM from one type of storage repository to another. The example in this article shows how to copy a VM from local storage to Network File Share NFS storage...

Error: "STOP: 0x0000007B ... " After Updating the Virtual Machine Tools on Provisioning Services

After switching vDisk to Private Mode and upgrading the hosting infrastructure’s Virtual Machine tools VM tools, Virtual Machine stops and displays a blue screen with the following stop error: STOP: 0x0000007B Note: This behavior does not occur with Microsoft’s Hyper-V Integration Services...

Unable to Connect to High Availability Enabled XenSever Pool and All Servers in Pool are in Emergency Mode

This article provides resolution to connectivity issues to the pool in XenCenter. Following are some of the issues that you might experience: Cannot connect to the pool in XenCenter Cannot start or migrate the virtual machines, although the virtual machines are active and running. All the servers...

Linux Virtual Machines are Unable to Boot from DVD on XenServer

On XenServer, a user can run both Linux and Windows virtual machines, and like physical machines, it can be set to boot from various sources. However, when a Linux virtual machine is set to boot from DVD, it can fail with the following error message:...

Provisioning Services Server Target Devices BSOD with KERNEL_SECURITY_CHECK_FAILURE When Cache is Set on RAM

Provisioning Services PVS Server target devices streamed to a vSphere Virtual Machine displays a blue screen withKERNELSECURITYCHECKFAILURE when cache is set on RAM...

Cannot Connect to vCenter Through the Streamed VM Setup Wizard to Create VMs

Cannot connect to vCenter throughthe Streamed VM Setup Wizard in order to create Virtual Machines VMs...

Error ID: XDDS:A75A86BB When Adding Machines to a Streamed Catalog Error Occurs

While adding machines to a streamed catalog, wizard shows the error“The virtual machine with MAC address xx:xx:xx:xx:xx:xx in the selected Device Collection could not be found on any available connection”. Exception : Citrix.Console.Models.Exceptions.ScriptException The virtual machine CTX2-TTM01...

After importing of an OVF package from a VMware environment Virtual Machine Fails to Boot with STOP 7B or 'Device Does Not Exist'

After importing of an OVF package from a VMware environment, a Windows virtual machine fails with a STOP 0x0000007B error, or a Linux virtual machine does not boot because a device /dev/sda1 for example does not exist. On a Windows virtual machine a STOP 0x0000007B error occurs. On a Linux virtua...

How to Export a Virtual Machine to an External USB Drive

This article describes how to export a XenServer Virtual Machine VM to a USB storage device...

How to Create a Designated Update Virtual Machine and Add a Host Connection to Hosts Node

This article explains how to create a designated Update Virtual Machine VM and add a host connection to the Hosts node. Note : This article is part 1 of the three articles on how to manage vDisk for automatic updates. 1. CTX137757 – How to Create a Designated Update Virtual machine and adding a...

Error: "HVM is Required for this Operation" when Trying to Start the VM in XenServer

Example 1 When trying to start the virtual machine VMthe following error is returned: “ There were no servers available to start VM ” The reason is displayed as “ HVM Hardware Virtual Machine is required for this operation ” Example 2 When trying to migrate a Windows VM from one host to another...

Setting vDisk Boot Menu as a Default Option

This article describes how to enable the first menu option as the default boot choice without prompting when vDisk boot menu appears. Background A Provisioning Services vDisk boot menu appears when the user is starting a provisioned Virtual Machine, but the user wants the Virtual Machine to start...

How to Configure a Promiscuous Virtual Machine in XenServer

This article describes how to configure a Virtual Machine VM running on XenServer to behave promiscuously on the network, that is, allow it to see all network traffic on the Physical Network Interface PIF. Certain applications, such as network diagnostic or performance monitoring tools, might...

Troubleshooting Linux Virtual Machines in XenServer

This article describes about troubleshooting Linux virtual machines in XenServer. Serial console was used to access UNIX server consoles and most of the network devices switches, routes. The simplicity of serial port hardware and its universality make them popular. Serial console apart from...

UBUNTU-CVE-2024-40953

In the Linux kernel, the following vulnerability has been resolved: KVM: Fix a data race on lastboostedvcpu in kvmvcpuonspin Use READ,WRITEONCE to access kvm-lastboostedvcpu to ensure the loads and stores are atomic. In the extremely unlikely scenario the compiler tears the stores, it's...

kernel: KVM: NULL pointer dereference in kvm_mmu_invpcid_gva

A flaw was found in KVM. With shadow paging enabled if INVPCID is executed with CR0.PG=0, the invlpg callback is not set, and the result is a NULL pointer dereference. This flaw allows a guest user to cause a kernel oops condition on the host, resulting in a denial of service...

Lower Video Transcoding Costs with Dedicated Linode Instances

Discover how to slash video transcoding costs by 33% with dedicated compute instances and learn effective strategies to reduce egress fees and optimize VM utilization...

SUSE CVE-2024-39483

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: WARN on vNMI + NMI window iff NMIs are outright masked When requesting an NMI window, WARN on vNMI support being enabled if and only if NMIs are actually masked, i.e. if the vCPU is already handling an NMI. KVM's ABI fo...

Low: Red Hat Security Advisory: virt:rhel and virt-devel:rhel security and bug fix update

An update for the virt:rhel and virt-devel:rhel modules is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Kernel-based Virtual Machine KVM offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide...