Hyper V

By default the virtual machine configuration files are stored in C:\ProgramData\Microsoft\Windows\Hyper-V,
and the virtual hard drives are stored in C:\Users\Public\Documents\Hyper-V\Virtual Hard Disks

Run Windows Performance Monitor from MMC. To monitor multiple Hyper-V Servers

live migrate, quick migrate, or move to migrate a virtual machine to another node. Live Migration has not downtime but Quick Migration does. You can do the migration using VMM or Failover Cluster Manager

EXTERNAL
External networks are mainly used for “”PUBLIC” communication.
INTERNAL
Internal virtual networks are used to allow communications between
• Virtual machine to virtual machine on the same physical server
• Virtual machine to parent partition (and visa-versa)
PRIVATE
Private virtual networks are used to allow communications between
• Virtual machine to virtual machine on the same physical server

CSV stands for Cluster Shared Volumes. With CSV, multiple virtual machines that are distributed across multiple cluster nodes can all access their Virtual Hard Disk (VHD) files at the same time, and the clustered virtual machines can all fail over independently of one another.

Virtual machine snapshots, which capture the state, data, and hardware configuration of a running virtual machine. Because snapshots record system states, you can revert the virtual machine to a previous state.

Hyper-V Integration Components

Hyper-V Integration Services improve virtual machine management by replacing generic operating system driver files for the mouse, keyboard, video, network and SCSI controller components. It also synchronizes time between the guest and host operating systems and can provide file interoperability and a heartbeat

Other software:

Veeam and Altaro backup

Merge AVHDX files

From the error it looks its being used or merging is still in process.

  1. Try SYSTEM account full rights to the .avhdx files

icacls “full-path-to-vhd-or-vhdx-file” /grant “NT VIRTUAL MACHINE\Virtual-Machine-ID”:(F)

  1. Disable any Back of Antivirus program for temporary purpose.
  2. Restart Hyper-V and VMMS services
  1. Insert the USB media to the Hyper-V host.
  2. go to disk management on the host and right click the usb storage, and take it offline. (The VM and the host are not allowed to have simultaneous access)
  3. Go to the settings of your VM and click on SCSI controller
  4. Add the type “HardDrive”
  5. Go to the newly create harddrive in the Hyper-V settings menu and click on the option Physical harddrive. You should be able to select the USB drive.