[PVE-User] NVMe - RAID Z - Proxmox

[lord_Niedzwiedz]

I upgrade bios/firmware server motherboard Supermicro.
I set everything in the BIOS to "legacy" mode.
Not only in the boot menu.
Supermicro -> Bios -> Advence -> PCIe/PCI/Pnp Configuration (everything 
on legacy).

Weird, because in my PC (processor Ryzen), everything is on UEFI 
(windows 10 and Fedora works perfecly).

Its work now.
But....

1) On sysrescue-cd one nvme disk speed = 2600MB/s.
RAID 5/6  = max 3600MB/s (on 4-5 drives).
Why not N*2600 - 2600 MB/s  ??!!

*2) *I create RAID 1    or    RAID 10.    It works.*
**But Proxmox is displayed ***a message * with RAID Z1-2.**
**https://help.komandor.pl/Wymiana/iKVM_capture.jpg**
*
3) I make install Proxmox on one m2 disk (lvm) - boot system.
I have 5 disks.
I can of course install proxmox on 1 disk (or on raid 1, two disks).
The question is how to add other disks?
Is it worth creating a RAID Z from the other 3-4 disks?
What configuration would you recommend?

>>>> Im trying to install Proxmox on 4 NVMe drives.
>>>> One on the motherboard, two on the PCIe.
>>>>
>>>> Proxmox see everything at the installation.
>>>> I give the option zfs (RAIDZ-1).
>>>>
>>>> And I get a mistake error at the end.
>>>> "unable to create zfs root pool"
>>> GRUB is not yet working with ZFS on EFI. Try to switch to legacy boot in
>>> BIOS if possible or use LVM for the installation.
>>>
>>>> Attached pictures (1-5) .jpg.
>>>> https://help.komandor.pl/Wymiana/1.jpg
>>>> https://help.komandor.pl/Wymiana/2.jpg
>>>> https://help.komandor.pl/Wymiana/3.jpg
>>>> https://help.komandor.pl/Wymiana/4.jpg
>>>> https://help.komandor.pl/Wymiana/5.jpg
>>>>
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