Dear all struggling on getting your HP Z Turbo Drive G2 to work: to get this device to work you have to desolder the Q1 transistor from the circuit board. I did this myself and now my HPE ML110 Gen9 is seeing the device as Drive D in Windows 10 Pro.

Check this link for more info on this Q1 transistor desoldering fenomenon:
https://forums.servethehome.com/index.ph...g2-512gb.21195/

To boot from the z820 follow these directions

DUET Refind link is available on this site

[Guide] NVMe-boot for systems with legacy BIOS and older-UEFI (DUET-REFIND)



first, set bios to "factory" defaults
now enter bios and disable the Intel "AMT", boot from network and if not booting from the onboard LSI SAS/SATA controller
disable the LSI controller boot rom (do not disable the LSI controller unless you are using a addin Raid card)
also disable the boot from network card option

now look at the bios boot order section, and make the USB Hard Disk device the top most entry
(you can leave the legacy section alone)

also make sure the Select Boot device Option is enabled (F9 key)

now reboot


download DUET (UDK2019) with REFIND included, and uncompress the files to a desired location

directions For the z820..........................
HOW to MAKE THE USB flash drive for REFIND.

Booting the NVME drive from a older-UEFI capable board that lacks the nvme boot code (like the z820)
using REFIND mass-storage without DUET

--------------------------------------------------------------------------------------------------------------------
Refind USBSetup:

• 1) Connect a USB flash drive (2gb or less) and go to the UDK2019 folder and start the "USBSetup" application

• 2) Select the 2gb USB flash drive letter from the drop-down combo box

    Warning.
    The following step will completely remove all information and partitions on the selected USB flash drive

• 3) Remove all information and partitions from the usb drive by clicking on: CLEAN

• 4) Optional, format the selected usb drive by clicking on: FORMAT

• 5) Copy the graphical boot manager REFIND onto the usb drive by clicking on: REFIND

• 6) Once done remove the Refind USB flash drive

• 7) create a GPT version of Windows 10 x64 installer using a USB key by either downloading it from the MS website
or use the program Rufus to create the key from a Win 10 ISO Image (a 16GB or larger usb key is required for this)

• 8) Insert the Win 10 installer USB Key into the target system's usb 2.0 port
and make sure the Boot from USB option in your system BIOS is configured as the first bootable UEFI device

for the z820 this will be the top part of the UEFI bios settings
you want the USB Hard Drive Option to be the topmost entry
do not change any settings in the lower "Legacy Bios" settings, leave as is

• 9) Reboot, the system should boot from the USB key and begin the windows setup follow the prompts
and if offered, select "Custom Installation" and remove/delete any existing partitions, then click "NEXT"

let it continue, and when it reboots and comes back to the begining windows 10 install screen
REMOVE THE WIN-10 INSTALL USB KEY, and REPLACE IT WITH THE 2GB REFIND USB KEY

Once the usb keys are swapped, click on the red "X" of the windows setup box and windows will ask if you want to
cancel the win 10 install (say YES) and the system should reboot

windows will now load the REFIND nvme/boot manager from the usb key and then continue the final part of
the windows setup

when windows setup finishes, you can optionally power off and move the REFIND usb key inside the z820 by using a
9 pin to USB adapter to connect the usb key to the motherboards internal usb header
if you go this route, i strongly recomend you use a usb key that has a plastic (not metal) shell
to prevent possible motherboard shorts if the usb key comes loose or moves around

Last, you can hide the REFIND USB key from the windows OS by using "Disk Management"
and remove the usb keys drive letter

Notes:
RAID to AHCI - AHCI to RAID
Windows 10: installing any newer RST software without reducing the "MessageNumberLimit" from the default 80 to 8
could trigger the never ending loading circle,
if your motherboard never reaches the desktop, go to the DELETE RAID driver section.



How to use the SATA RAID software option
For the SHELL: find the suitable RST EFI SATA\RAID driver version and place it inside the "EFI\Raid" directory,
then modify the "startup.nsh" accordingly or rename the file in "RaidDriver.efi".
For the OPTIONAL BOOT MANAGER: find the suitable RST EFI SATA\RAID driver version
and place it inside the "EFI\Boot\drivers" directory.