Re: Linux ZFS Grub compatibility

[John Lane]

On 08/06/18 18:48, Xen wrote:
> John Lane schreef op 08-06-2018 15:10:
>
>> I'm trying unsuccessfully to create a ZFS zpool that I can read in Grub.
>
> Haven't done it myself yet but it seemed there were plenty of tutorials.
>
> One thing to note is that on Solaris, you could not boot from a pool
> that has
> a separate cache, but that might not even apply to Grub.
>
> The only thing I've remembered, is that you do have to use filesystem
> volumes,
> and not any zvols - but grub should have a parameter syntax to select
> the filesystem volume.
>
> Also do zpools themselves not have a boot parameter?
>
>        bootfs=pool/dataset
>
>            Identifies  the default bootable dataset for the root pool.
> This property is expected to
>            be set mainly by the installation and upgrade programs.
>
> I'm sorry I cannot offer anything more, but your problems are also
> rather unspecific.

Thanks for your reply. All that I am trying to do at this stage is
create a zpool that I can read in Grub. I am not (yet) trying to boot
anything - just prove that the boot files on the zpool can be accessed
from Grub.

I have created a filesystem volume but I cannot read it. I've tried
various features enabled and disabled without success. When I do  "ls
(hd1,1)/ROOT/archlinux@/boot' I get errors for each file about the
compression algorithm not being supported. Enabling or disabling
lz4_compress does not help.

I have used the zfsinfo module to confirm that Grub does know it's a zfs
pool.

The detail is on the linked post [1] but I can repeat it here if it helps.

[1] https://unix.stackexchange.com/questions/447960

Thanks.

>
> Regards.
>
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