VMware on Mexicali IT

VMware: How to Fix "Two Filesystems With the Same UUID Have Been Detected"

Sun, 08 Mar 2026 13:30:00 -0700

Encountering the “Two filesystems with the same UUID have been detected” error during an ESXi host boot can immediately halt your hypervisor’s startup sequence. This issue typically occurs when the host detects multiple storage devices or boot partitions that share the exact same Universally Unique Identifier (UUID). This is a common side-effect of cloning a boot USB drive, SD card, or dealing with duplicate LUN snapshots without resigning the VMFS volumes. Resolving this boot halt is critical to bringing your ESXi host back online.

VMware: How to Install a New Certificate with an Internal CA

Sun, 08 Mar 2026 12:35:00 -0700

Securing your vCenter Server (VCSA) with an authentic SSL certificate is a crucial step towards maintaining a robust virtualization environment. By default, vCenter uses self-signed certificates, which prompt annoying and potentially dangerous browser security warnings. Replacing these with a certificate signed by your own Internal Certificate Authority (CA) not only eliminates these warnings but also ensures that all communication within your management plane is encrypted and trusted natively by your domain devices.

VMware: How to Apply Patches to vCenter Server

Sat, 07 Mar 2026 11:15:00 -0700

Keeping your vCenter Server updated is not just a best practice; it’s a critical operational necessity. Regular patching resolves severe security vulnerabilities, delivers essential bug fixes, and ensures compatibility with modern hardware and newer ESXi hosts. Since vCenter acts as the central command hub for your entire virtual infrastructure, an unpatched server can become a major security liability and compromise the stability of all managed workloads.

Navigate to your vCenter Server Management Interface (VAMI) using port 5480:

VMware: Installing VMware vCenter Server (VCSA)

Thu, 05 Mar 2026 10:00:00 -0800

The Heart of Your Infrastructure: Why You Need vCenter

Managing ESXi servers individually through their web interface is fine for a very small environment, but when you’re looking to scale, automate, and ensure availability, vCenter Server is the critical component. It acts as the centralized control panel for your entire vSphere infrastructure.

Key Advantages of Deploying vCenter:

Centralized Management: Control multiple ESXi hosts, virtual machines, and networks from a single console.

VMware: Unable to migrate VM (Migrate button grayed out) - Resolved via MOB

Wed, 04 Mar 2026 13:58:17 -0800

Have you ever tried to migrate a Virtual Machine in vCenter and found that the Migrate… option is completely disabled (grayed out)?

Often, when trying to power it on or move it, vCenter displays a message indicating that the VM is pinned to a host (“The virtual machine is pinned to a host”). This usually happens when backup software (like Veeam) leaves a task hanging, or when a previous operation fails, leaving the VM in a locked or logically “locked” state.

VMware: How to Upgrade an ESXi Server

Wed, 08 Jun 2022 14:00:00 -0800

Introduction

In this post, we’ll see step-by-step how to upgrade a standalone ESXi server, using both online and offline methods.

The process requires the server to be in maintenance mode and will need a restart upon completion. Therefore, I recommend moving all VMs to another host if they are in a cluster.

For this procedure, I will use the server previously created in the post How to Install an ESXi Server. As we can see, the server version is 6.7.0 Update 3 (Build 14320388).

VMware: How to Install vRealize Operations Manager

Tue, 07 Jun 2022 14:00:00 -0800

Introduction

In this post, we’ll see step-by-step how to install VMware vRealize Operations Manager.

But what is VMware vRealize Operations Manager? vRealize Operations Manager is a VMware tool that helps IT administrators monitor, troubleshoot, and manage the health and capacity of the entire virtual infrastructure in VMware.

VMware vRealize Operations Manager collects performance data from each object within our environment, stores and analyzes the information, and provides it in real time for better decision-making.

VMware: How to Install an ESXi Server

Sun, 05 Jun 2022 14:00:00 -0800

Introduction

In this post, we’ll see step-by-step how to install the VMware ESXi Hypervisor… but what is a hypervisor?

A hypervisor is software that allows a server to allocate resources to different virtual machines hosted on it by using shared resources, such as memory and processing power.

Generally, we can find two types of hypervisors.

Type 1 hypervisors are those that are installed directly on the computer, while Type 2 hypervisors are those that are hosted within another operating system, such as Microsoft Hyper-V, VirtualBox, VMware Workstation, and others.

VMware: Updating Windows Templates in VMware with PowerCLI

Sun, 07 Nov 2021 22:39:01 -0800

Introduction

As we’ve seen in previous posts, the typical way to create new virtual machines is through templates. As administrators, we need to keep these templates updated. Having one or two templates isn’t a challenge or very time-consuming, but if you have several templates in different locations, such as: 3 templates in Mexicali, 3 in Tijuana, 3 in Ensenada, and another 3 somewhere else (just to name a few), this task can be a bit time-consuming since the procedure involves several steps.

VMware: How to Create a Virtual Machine from a Template – GUI/PowerCLI

Sat, 06 Nov 2021 22:39:01 -0800

Introduction

In this post, we’ll see how to create a new VM from a template. In previous posts, we saw how to create a VM from scratch; however, the ideal way is to create VMs from a template. Here, we’ll see how to perform this task using vCenter (graphical method) and PowerShell.

Right-click where you want to create the VM (in this case, I’ll use the resource pool I created earlier), then select New Virtual Machine….

VMware: How to Convert a Virtual Machine into a Template, from GUI/PowerCLI

Tue, 02 Nov 2021 22:39:01 -0800

Introduction

In this post, we’ll see how to create a virtual machine template that we can use to create other virtual machines.

I recommend updating Windows completely before creating the template. Once that’s done, we can proceed.

Select the virtual machine you want to convert into a template, click on Actions, select Template, and then Convert to Template.

Accept the warning.

As you can see in the image, the template has disappeared from the resource pool.

VMware: How to create a new virtual machine from scratch.

Sun, 31 Oct 2021 22:39:01 -0800

Introduction

In this post, we’ll see how to create a new virtual machine from scratch. While the ideal approach is to create virtual machines from a template, here we’ll see how to do it if you don’t have one. In future posts, I’ll explain how to create a template from an existing virtual machine and then create virtual machines from that template.

Right-click on the cluster or resource pool where you want the new virtual machine to be located, and select “New Virtual Machine…”

VMware on Mexicali IT

VMware: How to Fix "Two Filesystems With the Same UUID Have Been Detected"

VMware: How to Install a New Certificate with an Internal CA

VMware: How to Apply Patches to vCenter Server

1. Login into VAMI

VMware: Installing VMware vCenter Server (VCSA)

VMware: Unable to migrate VM (Migrate button grayed out) - Resolved via MOB

VMware: How to Upgrade an ESXi Server

Introduction

VMware: How to Install vRealize Operations Manager

Introduction

VMware: How to Install an ESXi Server

Introduction

VMware: Updating Windows Templates in VMware with PowerCLI

Introduction

VMware: How to Create a Virtual Machine from a Template – GUI/PowerCLI

Introduction

VMware: How to Convert a Virtual Machine into a Template, from GUI/PowerCLI

Introduction

VMware: How to create a new virtual machine from scratch.

Introduction