NetWorker: NMM Hyper-V Linux VM GLR is not supported

With Networker Module for Microsoft (NMM), Hyper-V Linux VM Granular Level Recovery (GLR) is not supported. 

Example errors that may be shown if this is attempted:

Unable to mount volumes for physical drive '\\.\PhysicalDriveXX'
Attaching hard disk failed. End time:  <date time> 

This is a limitation in Networker Module for Microsoft .  

The NMM documentation states:
You can perform GLR of NMM backups of Hyper-V virtual machine that has a Windows operating system. NMM does not support GLR of non-Windows virtual machines on Hyper-V, for example Linux virtual machines.

Prior Networker Module for Microsoft 19.12 , you can only perform image recovery of Linux VM.

Starting  Networker Module for Microsoft 19.12 added support for FLR of Hyper-V Server Linux virtual machines.

You can use the hyperv_linux_glr_recover binary (command) to perform the FLR. The binary mounts the Linux VHDs that contain the items to recover.

For requirements and steps, please refer to 

https://www.dell.com/support/manuals/en-us/networker-module-for-microsoft/nmm_for_hyper-v_user_guide_19.12/recovering-hyper-v-server-linux-virtual-machines-at-granular-level?guid=guid-dbce2c82-2722-4bfd-bf67-a094b98994ea&lang=en-us

Release notes:

https://www.dell.com/support/manuals/en-us/networker-module-for-microsoft/nmm_release_notes_19.12/new-features?guid=guid-e1731077-924d-4f1c-befa-bfc071295177&lang=en-us