ZFS on RPI 4 system - module is not loaded.

Hi All,

I was trying to test ZFS on my system, but ran into an issue with that.

When going to 'Storage' -> 'zfs' -> 'Pools', I'm getting the following error message:

Zitat

Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C.UTF-8; export LANGUAGE=; zfs list -p -H -t all -o name,type 2>&1' with exit code '1': The ZFS modules are not loaded.

Try running '/sbin/modprobe zfs' as root to load them.

OMV\ExecException: Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C.UTF-8; export LANGUAGE=; zfs list -p -H -t all -o name,type 2>&1' with exit code '1': The ZFS modules are not loaded.

Try running '/sbin/modprobe zfs' as root to load them. in /usr/share/php/openmediavault/system/process.inc:220

Stack trace:

#0 /usr/share/omvzfs/Utils.php(441): OMV\System\Process->execute(Array, 1)

#1 /usr/share/omvzfs/Utils.php(253): OMVModuleZFSUtil::exec('zfs list -p -H ...', Array, 1)

#2 /usr/share/openmediavault/engined/rpc/zfs.inc(245): OMVModuleZFSUtil::getZFSFlatArray()

#3 [internal function]: OMVRpcServiceZFS->listPools(Array, Array)

#4 /usr/share/php/openmediavault/rpc/serviceabstract.inc(123): call_user_func_array(Array, Array)

#5 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('listPools', Array, Array)

#6 /usr/sbin/omv-engined(537): OMV\Rpc\Rpc::call('Zfs', 'listPools', Array, Array, 1)

#7 {main}

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A similar error message appears when trying to run zpool list:

Zitat

$ zpool list

The ZFS modules are not loaded.

Try running '/sbin/modprobe zfs' as root to load them.

When I try to do the suggested action, I'm getting the following error:

Zitat

$ sudo modprobe zfs

modprobe: FATAL: Module zfs not found in directory /lib/modules/6.1.19-v8+

System:

RPI 4.

Variant:

4GB RAM

uname -m output:

aarch64

OMV version:

6.3.7-5 (but it happened to me on earlier versions too).

Kernel:

Linux 6.1.19-v8+

ZFS plugin version:

openmediavault-zfs 6.0.12

(not sure if required) - main drive:
SSD through USB-3.

Hopefully, I haven't missed any important details. Let me know if there's an additional input needed for this issue.

Also, since I'm using RPI, then all storage is external drives. The ZFS is meant to be used for RAID-Z. I'm aware to the fact that this is not recommended. For my setup and usage - it's ok (this is a test environment. not a "production" one. I'm using it mainly to learn OMV and docker).

Anyone knows how to solve this case?

Thanks,

Thanks for replying.

Zitat von ryecoaaron

Just don't. It is not worth it.

Can you elaborate a bit more on that? why is it not recommended?
I was under the impression that since this has an official plugin, then this should be ok to use.

Zitat von ryecoaaron

btrfs will have a much better experience and is supported better by linux and OMV.

I was hoping to use raid5 with it. My understanding is that raid5/6 are not fully supported by BTRFS at the moment. Am I wrong?
Any other suggestions on how it is best to use 3 drives with BTRFS?

Zitat von ryecoaaron

Because I already tried this experimentation on an RPi4 and did not have good results. So, I am personally recommending that you not use it as the maintainer of the zfs plugin.

ok. that sums it up (sorry. I wasn't aware to the fact that you are the maintainer of it). thanks for explaining

Zitat von ryecoaaron

It isn't backup and not supported at all on usb drives

as mentioned - the RPI is a "test" environment where I do most of my learning part about OMV and dockers.

Zitat von ryecoaaron

OMV supports raid5 if you create the array from the command line

not that it matter, and just to clarify - I was using "raid5" term wrongly in my previous answer. I meant for raidz1 (which, to my knowledge, is the equivalent to "regular" raid5).

Zitat von ryecoaaron

I would recommend ext4 on each drive, pool with mergerfs, and add redundancy/bitrot detection with snapraid.

probably you already noticed it, but I have relatively little knowledge and I'm new to this world. you gave me some new stuff to learn about (first time I here about mergerfs and snapraid. from very quick search about it, sounds like something I need to further learn and investigate. might be relevant to some other systems/scenarios I have). many thanks for the input.

one question though: in your last comment, you have suggested ext4 with mergerfs + snapraid. from what I currently understand, the mergerfs + snapraid works on top of whatever filesystem I choose. if so - why not using btrfs with mergerfs + snapraid? btrfs have more features it can provide which do not exist on ext4 (like snapshots).

again, thanks for the help. really do appreciate it.

ok.
many thanks for the explanation and for the pointers.

I tend to agree. thanks for the tip.