ODROID N2+: Struggling to install ZFS

[lucab]

Hi All,

 

On an Odroid N2+ board, I have tried to install ZFS following different suggestions I found on the web.

None of them worked so far.

 

I tried:

https://forum.armbian.com/topic/19952-cant-install-kernel-headers-via-armbian-config/

https://forum.armbian.com/topic/18790-odroidhc4-with-5139-meson64-missing-zfs-modules/

https://forum.armbian.com/topic/17337-zfs-just-works-now-on-armbian-2-step-instructions-if-you-are-thick-like-me/

 

I installed both Armbian 22.05 Bullseye 5.10.110-meson64 first, and then Jammy 5.17.

 

Could someone please help me?
Thanks 🙂

[Werner]

Moved to P2P help.

[lucab]

Update: still not working.
 

Fresh installation of Armbian_22.05.4_Odroidn2_bullseye_current_5.10.123.img

• sudo apt-get update
• sudo apt-get dist-upgrade
• sudo reboot
• sudo armbian-config -> software -> Headers_install
• sudo armbian-config -> software -> Source_install
• sudo apt install zfs-dkms zfsutils-linux

 

Get error:

Setting up zfsutils-linux (2.0.3-9) ...
modprobe: FATAL: Module zfs not found in directory /lib/modules/5.10.123-meson64
zfs-import-scan.service is a disabled or a static unit, not starting it.
Job for zfs-load-module.service failed.

 

[Igor]

On 7/11/2022 at 11:26 PM, lucab said:

Fresh installation of Armbian_22.05.4_Odroidn2_bullseye_current_5.10.123.img

It was only tested with Jammy:
https://forum.armbian.com/ytopic/19336-armbian-ubuntu-2204-jammy-with-zfs-211-for-odroid-hc4/

Debian package base might need some additional fixing.

 

[lucab]

I see.

Hopefully soon it will be available for odroid N2+.

Thanks @Igor for answering and for the great work and support.

 

Luca

[Igor]

4 hours ago, lucab said:

Hopefully soon it will be available for odroid N2+.

 

For Odroid N2+ this works exactly the same, but you need to use EDGE kernel.

https://www.armbian.com/odroid-n2/

 

... as the bug is elsewhere.

[Greek64]

On 7/11/2022 at 11:26 PM, lucab said:

Setting up zfsutils-linux (2.0.3-9) ...

 

modprobe: FATAL: Module zfs not found in directory /lib/modules/5.10.123-meson64
zfs-import-scan.service is a disabled or a static unit, not starting it.
Job for zfs-load-module.service failed.

 

 

 

There should be another error before this for the failed `zfs-dkms` installation.

Probably something along the lines of "configure: error: Unable to build an empty module."

That happens because the kernel header package "linux-headers-current-meson64" is missing a file needed to build out-of-tree modules (dkms).

 

Check if "module.lds" exists under "/usr/src/linux-headers-5.10.123-meson64/scripts/".

If not, you have found the root of your problem.

 

The fix is somewhat simple. You can just construct your own "module.lds" and place it in the above directory.

The file contents consists of following:

 

• The contents of the official "module.lds.S" file of the 5.10 kernel source (can be found here) without the last "#include" line
• The contents of the  architecture specific "module.lds.h" header file. Odroid N2+ should be arm64, so the contents of "/usr/src/linux-headers-5.10.123-meson64/arch/arm64/include/asm/module.lds.h"

 

For my Odroid HC4 the module.lds looks as follows:

/*
 * Common module linker script, always used when linking a module.
 * Archs are free to supply their own linker scripts.  ld will
 * combine them automatically.
 */
SECTIONS {
        /DISCARD/ : {
                *(.discard)
                *(.discard.*)
        }

        __ksymtab               0 : { *(SORT(___ksymtab+*)) }
        __ksymtab_gpl           0 : { *(SORT(___ksymtab_gpl+*)) }
        __ksymtab_unused        0 : { *(SORT(___ksymtab_unused+*)) }
        __ksymtab_unused_gpl    0 : { *(SORT(___ksymtab_unused_gpl+*)) }
        __ksymtab_gpl_future    0 : { *(SORT(___ksymtab_gpl_future+*)) }
        __kcrctab               0 : { *(SORT(___kcrctab+*)) }
        __kcrctab_gpl           0 : { *(SORT(___kcrctab_gpl+*)) }
        __kcrctab_unused        0 : { *(SORT(___kcrctab_unused+*)) }
        __kcrctab_unused_gpl    0 : { *(SORT(___kcrctab_unused_gpl+*)) }
        __kcrctab_gpl_future    0 : { *(SORT(___kcrctab_gpl_future+*)) }

        .init_array             0 : ALIGN(8) { *(SORT(.init_array.*)) *(.init_array) }

        __jump_table            0 : ALIGN(8) { KEEP(*(__jump_table)) }
}

SECTIONS {
        .plt 0 : { BYTE(0) }
        .init.plt 0 : { BYTE(0) }
        .text.ftrace_trampoline 0 : { BYTE(0) }
}

Since you have the same kernel and also the same architecture the file contents should work as is also for you.

 

As for why this file is missing, the reason is some upstream kernel module compiling changes, which affected armbian build scripts because the Makefiles were removing the "module.lds" file on "make clean".

This SHOULD have been fixed with AR-608 / #2545. Maybe @Igor could shed some light on which kernel version will have the "module.lds" files included in the header package (If I understood it correctly, the header packages for 5.15.y kernels do not have this problem).

 

[lucab]

Thanks all for your suggestions and help.

I think I will wait for a stable release as I don't want to risk to do this procedure all the time a new kernel update is available.

 

Thanks,

Luca

[lucab]

Hi All.

I have just installed Armbian v22.08 (2022-08-30). It says it has zfs support, so I have tried running sudo apt-get install zfsutils-linux zfs-dkms. It returns an error. So I tried to follow @Greek64 suggestion, but the path /usr/src/ is empty.
I used armbian-config to install software -> header_install. The progress bar appears but it exits immediately, like nothing happened.

 

Any suggestions?

Thanks,

Luca