Upgrade to 4.x but STAY on the 3.x 4.9 kernel?

If we upgrade OMV 3.x to 4.x it wants to downgrade the kernel to 4.15 but that seems to break ZFS... so can we just keep using the 4.9 kernel/Linux base system instead of the older 4.15 version? Or is that going to cause issues later on?

Or how can we upgrade to 4.x from 3.x yet still maintain our ZFS capabilities?

Ah, for some reason I was thinking it was 1.5 rather than 15 - sorry that was kinda dumb...

Anyway, I figured it was something that had to do with the headers package - I had tried to update them via:

sudo apt-get install linux-headers-$(uname -r)

but it gave me a 'broken packages' error. Any way to get around that for the time being? Something I could edit to get them to install properly? -OR- If I didn't install the .15 Linux packages for the time being, would it cause issues to stay on the .9 kernel? At least until the headers package was fixed?

UPDATE: I may have figured it out - I used the answer from Telecomic in the 'Is ZFS supported in Kernel 4.13' thread and did the following:

add the following to /etc/default/openmediavault:
OMV_APT_USE_KERNEL_BACKPORTS="no"

Then do:
omv-mkconf apt

apt-get update

And that seemed to work! I am running OMV 4 using the 4.9 kernel! So I guess the only question is: What effect will this have on OMV and future updates?

Zitat von drinks2go

couldn't you just install 4.14 kernel and try that out?

I could try that - I am testing in a Virtual Machine before I actually change my 'real' machine... so what do I need to modify to get the correct 4.14 kernel?