Category: VMware

L1 Terminal Fault

CVE-2018-3646 – L1 Terminal Fault

Intel has disclosed details on a new class of CPU speculative-execution vulnerabilities known collectively as “L1 Terminal Fault” that can occur on past and current Intel processors (from at least 2009 – 2018) [See Table 1 for supported vSphere processors that are affected].

Like Meltdown, Rogue System Register Read, and “Lazy FP state restore”, the “L1 Terminal Fault” vulnerability can occur when affected Intel microprocessors speculate beyond an unpermitted data access. By continuing the speculation in these cases, the affected Intel microprocessors expose a new side-channel for attack. (Note, however, that architectural correctness is still provided as the speculative operations will be later nullified at instruction retirement.) Read More »

Virtual Machine disks consolidation is needed

As per VMware : When a virtual machine snapshot consolidation fails in vSphere, a Configuration Issue warning is reported in the Summary tab of a VM.

When you initiate snapshots deletion, virtual machine disks consolidation happens along with snapshot delete operation. But sometimes due to bad sectors or configuration file errors or due to backup tool, your virtual machines show a warning message “Virtual Machine disks consolidation is needed”.

When you try to consolidate the disks it may fail to consolidate the disks and show error similar to the below:Read More »

How to Deploy, Install and Configure vSphere Replication 6.5.1

The following post will explain you the step by step procedure of Installation and configuration of vSphere Replication 6.5.1.

Pre-Installation check:

  • Download the ISO image from
  • Before starting the implementation of vSphere replication, please check the compatibility of the other vSphere features, solutions and platforms from “VMware Product Interoperability Matrices”
  • Based on the compatibility matrix, consider to upgrade or install the other solutions before proceeding with vSphere Replication.
  • Check whether enough resources are available in your environment to deploy “vSphere Replication Appliance”.
  • Un-register if there is any old replication appliance was used with the vCenter, follow the steps from my previous post “Un-register vSphere Replication from vCenter” to do the same.
  • Verify and check whether DNS resolves FQDN of both source and target vCenters or update the host entries in /etc/hosts file in vCenter servers (VCSA).

Read More »

How to delete or unregister vSphere Replication extension or plugin from vCenter Server MOB

Sometimes we will not find the newly deployed vSphere feature or installed product plugin in vCenter Dashboard or Navigator in web-client. Most of the time, we may see this issue, it can be due to Extensions and the only way to fix it is by unregistering the product extension from vCenter Server managed object browser (MOB) and re-deploy it or re-register with vCenter from Appliance Management Interface (like VAMI).

In this post, I will show the steps to unregister the vSphere Replication extension, with this steps we can unregister any extension (SRM, VRA, VDP, VUM,etc.,) that is registered with vCenter Server.

  1. Log in to the vCenter Server managed object browser (MOB). The URL for the MOB is https://vCenter_FQDN/mob .
  2. Click “content” Under Properties>content> ServiceContent > content.Read More »

What is vSphere Replication?

VMware vSphere Replication is a hypervisor-based, asynchronous replication solution for vSphere virtual machines. It is fully integrated with VMware vCenter Server and the vSphere Web Client.  vSphere Replication delivers flexible, reliable and cost-efficient replication to enable data protection and disaster recovery for all virtual machines in your environment.

Read More »

How to upgrade ESXi 5.5 to 6.5.0 using Update Manager

The following upgrade process will explain you the step by step procedure to upgrade ESXi hosts from 5.5 to 6.5 using update manager:

Pre-upgrade check:

  • Download the ESXi 6.5 ISO image from
  • Before upgrading ESXi hosts, complete the vCenter upgrade and check the compatibility of the hardware from “VMware Compatibility Guide
  • Based on the compatibility matrix, consider to upgrade hardware BIOS firmware, drivers, HBA, NICs and partner vendor’s software vibs or include them in the baseline from update manager.
  • Check whether enough resources are available in the ESXi hosts part of the cluster to migrate virtual machines.

Read More »

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