NVMe and vm on proxmox for server 1c8.3?

Question

Debian

256 GB SSD Samsung 850 Pro [MZ-7KE256BW] (520-550)
will be two in a mirror raid.. soft.

But there is also an m2 connector on the board. Yes, not simple, but Gen3 x4.
and there is also a 256 GB SSD M.2 drive Plextor M8Pe (G) (2000-900)
Damn, there is such a speed)))
Soft raid 1 is of course unambiguously and unshakably better for the server.
But the speed on the M2 is so seductive, inviting, and intoxicating.
How to be? how can it be used? Spit on raid1? Or somehow use m2 as a cache or something else?

Answer 1

Damn, why the hell do you need so much speed then?
Are you sure you actually use that much?
I looked at my 1s server and there even one hundred megabytes per second was never utilized, let alone a regular ssd to sata where 600 mb per second is available