EFI/ZFS Update: successful tests, need more complex vdevs

[Steven Hartland]

On 15/01/2016 11:51, Renato Botelho wrote:
>> On Jan 15, 2016, at 00:41, Steven Hartland <killing at multiplay.co.uk> wrote:
>>
>> Just wanted to let everyone know that I just finished committing these changes to the tree.
>>
>> Huge thanks to Eric's for his work on this, as well as everyone else who contributed.
>>
>> I've set the target for MFC of 2 weeks, so I hope to be able to get this into stable/10 before the 10.3 slush, so if you're interested in this change please test a head build > r294068 ASAP.
> Great work, thanks!
>
> Is there a way to move a installed ZFS system to EFI?

All EFI needs is an valid EFI partition on a GPT disk and the updated 
loader.efi so if your devices is GPT based and you have space for an 
extra 800k partition then yes.

The following should be the basic steps you need (untested so backup 
your data)
1. gpart add -t efi -s 800k <dev>
2. gpart bootcode -p /boot/boot1.efifat  -i <idx> <dev>
3. Ensure your root filesystem has EFI ZFS boot compatible world e.g.
      cd /usr/src && make buildworld -jXX && make installworld

If you have an active MBR then you will likely need to disable this as 
EFI seems to ignore disks with active MBR even if they have a valid EFI 
partition.

If you don't have space then you'll need to migrate to a difference 
device to change the disk partition layout.

     Regards
     Steve