RAID0 vs Single VS DUP for 2x USB HDD (acting like one HDD)

Hi,

this is my first time to use OMV with more than one storage device.

Normally I click on storage, file system, add, EXT4 and add the HDD.

This time I wanna add 2 HDD's which act like one, so I read few howtos and decide to use RAID0, because I don't care about data loss, will get one storage device and on top better speeds, which I don't need btw.

Now I got more options. BTFRS >

SINGLE

DUP

RAID0

RAID1

RAID10

Problem 1: When I try to use EXT4 I can't use and RAID. Why?

Problem 2: What is SINGLE and DUP? Maybe better than RAID0?

Problem 3: I need to use BTFRS but why? I don't need snapshots or something like that.

Don't get me wrong, I try to understand and never use BTFRS.

What I need is just a "media SMB device" to get access for media on any device (Linux Desktop, Android Tablet, Windows PC and so on). Lose data would not be a problem, don't need backup/snapshot, just space and speed (2.5 inch HDD over USB).

Regards

Think about that, I watch few videos and read few article, non of them mentions mergerfs and "Raid is incompatible with USB devices".

Thank you, later I will try this. I already install omv extras for FlashMemory.

Thank you!

If somebodz is a noob, like I am this will maybe help.

After install and reboot when I click on it:

Software Failure. Press left mouse button to continue.

OMV Version is 7.1.1-1 (Sandworm) and addon mergerfs 7.0.5

Storage > File Systems > add with + all HDDs and after that you can do it on the tutorial like here

omv6:omv6_plugins:mergerfs [omv-extras.org]

chente thank you so much!

Maybe I can ask you why SMB is so slow on Linux compare to Windows? On Linux it is up to 87 MB/s and on Windows over 100 MB/s (write speeds)