Hello
I just started my new Helios4. The hardware is incredible and it's very easy to have a running Openmediavault running system, so the job is great but ...
I used to have a Cubox and could run OMV on it (see here Installing Openmediavault on a CuBox (ARM machine))
At that time in 2012, I had to rebuild a kernel to get GPT, LVM, XFS, etc. support.
As I want to use my Helios4 as a backup device (I have another Openmediavault server on classical x64 machine), I use XFS because I have huge filesystems (24 TB) and I found this filesystem to be very reliable (I have a XFS running now for 10 years, which i grew several times but never had to rebuild it).
So I built a copy of this FS (using 2 x 12 TB drives) using GPT and LVM. Helios4 recognizes immediately the volume after installing LVM2 plugin for OMV. But it can not mount the XFS filesystem (but the XFS commands are present in the Linux image). So I suppose the prebuilt kernel does not include XFS support.
I know that on old ARM kernels XFS seemed to be buggy, but I never had any problem with it on my Cubox.
I did not find a very clear documentation for rebuilding a kernel for Helios4. Perhaps you could include XFS by default on the helios4 kernel for OMV, as this filesystem is supported by default, including the GUI for creating new FS ?
Best regards
F.Bernard