Hyper-V & Virtualization

Hyper-V install, virtual switches, VM creation, checkpoints, nested virtualization, live migration, replica, and the storage and networking decisions that decide whether a Hyper-V host is fast or sad.

22 articles • follow them in order

1

Systems Admin
Configure Nested Virtualization on Hyper-V

Learn how to configure nested virtualization on Hyper-V so you can run Hyper-V inside a virtual machine. This step-by-step guide covers connecting to the guest VM, attempting Hyper-V role installation (and understanding the error), shutting down the VM, running Set-VMProcessor -ExposeVirtualizationExtensions on the physical host, restarting the VM, installing the Hyper-V role successfully, and verifying the nested Hyper-V Manager is operational. Includes best practices for memory allocation, performance overhead, and processor compatibility.

7 min Read step 1 →
2

Systems Admin
How to Install Windows Server on a Virtual Machine

Learn how to install Windows Server 2019 on a VMware ESXi virtual machine step by step. The same process works on Hyper-V, VirtualBox, and bare-metal servers.

6 min Read step 2 →
3

Systems Admin
Create a Windows 11 VM on Hyper-V via PowerShell: The Seven-Stage Build

Spinning up a Windows 11 VM through the Hyper-V Manager GUI works fine for one-off lab setups. For anything you might need to repeat — a fresh test environment for…

10 min Read step 3 →
4

Systems Admin
Build a Hyper-V Golden Image: Reference VM, Sysprep, and Cloning at Scale

Post 139 covered creating a Win11 VM from scratch via PowerShell. Doing that for one VM is fine; doing it for ten is tedious; doing it for a hundred is…

12 min Read step 4 →
5

Systems Admin
Upgrade a Hyper-V VM Configuration Schema: PowerShell, GUI, and the Caveats

Importing a VM from an older Hyper-V host onto a newer one works smoothly — the new host runs the imported VM’s configuration as-is, no fuss. The catch: the imported…

9 min Read step 5 →
6

Systems Admin
Enable a Virtual TPM on a Hyper-V VM: GUI, PowerShell, and the Prerequisites

The Trusted Platform Module is the small chip on every modern motherboard that handles cryptographic operations the OS doesn’t want to do in plain memory — key generation, key storage,…

8 min Read step 6 →
7

Systems Admin
Hyper-V Lab Networking: A NAT vSwitch With One Outbound IP

You’ve got a Hyper-V lab on your laptop or a spare server. You want the guest VMs to reach the internet for Windows updates, package installs, license activation, and the…

15 min Read step 7 →
8

Systems Admin
Hyper-V: Two Paths to Add Storage to a VM (VHDX File vs Pass-Through)

You need to give a Hyper-V guest more storage. Two paths get you there: create a VHDX file on the host and attach it to the VM, or claim a…

11 min Read step 8 →
9

Systems Admin
Hyper-V: Convert a VHD to VHDX (Detach First, Then Edit Disk)

You have a Hyper-V VM with a legacy VHD-format disk. Maybe it migrated from an old Server 2008 R2 host, maybe someone created it manually before VHDX became the default…

11 min Read step 9 →
10

Systems Admin
Flip a Hyper-V VHDX Between Pre-Allocated and On-Demand: GUI and PowerShell

VHDX disks come in two allocation modes. Pre-allocated reserves the full configured size on the host filesystem at creation time; on-demand allocates space as the guest writes. Each has a…

10 min Read step 10 →
11

Systems Admin
Manage Hyper-V VM Checkpoints

How Hyper-V checkpoints actually work (differencing-disk chain), when to use them (lab rollback, patch dry-run, demo reset, short-term oh-no insurance), why they aren't a backup, the Production vs Standard distinction (default Production - app-consistent via VSS - safe for most workloads except DC/SQL/Exchange replicas), the GUI flow for create / revert / apply / merge, the Edit Disk wizard for manual merge of orphaned chains, the PowerShell equivalents (Checkpoint-VM, Restore-VMSnapshot, Remove-VMSnapshot), and 7 common pitfalls (don't snapshot a DC, USN rollback, long-lived checkpoints, disk-space crunch, revert vs running VM).

10 min Read step 11 →
12

Systems Admin
Hyper-V Snapshots Part 1: Create, Revert, and Manage VM Save-States

The Hyper-V checkpoint is a save-state of a running VM — configuration, optionally memory, and a differencing-disk overlay that captures every block the VM writes after the snapshot is taken.…

12 min Read step 12 →
13

Systems Admin
Hyper-V Snapshots Part 2: Merging the AVHDX Chain Back Into the Parent VHDX

Part 1 covered creating, applying, and managing snapshots. This post is the consolidation half — what happens when you delete a snapshot and the differencing-disk overlay has to be merged…

11 min Read step 13 →
14

Systems Admin
Hyper-V Snapshots Part 3: Clone a VM From a Snapshot via Export and Import

Snapshots in Hyper-V are most often used as rollback points — create one before a risky change, revert if the change misbehaves. There’s a second use that’s less obvious but…

11 min Read step 14 →
15

Systems Admin
Hyper-V Storage Migration: Move a Live VM Between Disks With Zero Downtime

Disk fills up. Storage gets retired. A workload outgrows its tier. Whatever the trigger, sooner or later you need to move a Hyper-V VM’s files off one disk and onto…

14 min Read step 15 →
16

Systems Admin
Hyper-V Shared Nothing Live Migration: Move a Running VM Between Hosts Without a SAN

Two standalone Hyper-V hosts. No SAN, no Cluster Shared Volume, no shared anything — each host has its own local storage. A VM on the source host needs to end…

17 min Read step 16 →
17

Systems Admin
VMware ESXi to Hyper-V Migration With MVMC: VMDK to VHDX End-to-End

You have a VM running on VMware ESXi. You want it on Hyper-V instead. Maybe the org is consolidating onto Microsoft hypervisor for licensing reasons. Maybe you’re building a hybrid…

12 min Read step 17 →
18

Systems Admin
Hyper-V Replica in a Workgroup: Self-Signed Cert Setup End-to-End

Hyper-V Replica is the built-in disaster-recovery layer that ships with every Hyper-V install. It asynchronously copies a VM’s disks (and optionally point-in-time snapshots) to a second standalone Hyper-V host so…

17 min Read step 18 →
19

Systems Admin
Hyper-V Replica in a Domain: Kerberos Setup, Walked End-to-End

Hyper-V Replica is the built-in DR layer in every Hyper-V install. Configure it once and Hyper-V asynchronously copies a VM’s disks to a second standalone host every few minutes; if…

14 min Read step 19 →
20

Systems Admin
Hyper-V Replica Test Failover: A Safe DR Drill With No Production Impact

You stood up Hyper-V Replica in Part 1. Bytes are flowing from the primary host to the replica host every five minutes. The replica VM exists on HVHost02 in a…

14 min Read step 20 →
21

Systems Admin
Hyper-V Replica Planned Failover: Zero Data Loss Handover With Auto-Reverse

You set up Hyper-V Replica in Part 1 and proved it works via a quarterly drill in Part 2. Now the moment comes: you actually need to move the workload…

12 min Read step 21 →
22

Systems Admin
Hyper-V Replica Unplanned Failover: The Emergency Button (Part 4 of 4)

The primary host is gone. Power outage, hardware failure, ransomware that took out the SAN, fire in the rack — doesn’t matter what; the workload is down and the primary…

14 min Read step 22 →