Creating a bootable ZFS disk?

[Dr Josef Karthauser]

I did try populating the cache file on the last try, but it didn’t help. I’ll report back when I’ve completed the -a4k test.

Joe.

On 27 Dec 2014, at 16:52, Steven Hartland <killing at multiplay.co.uk> wrote:

> Actually the cache file shouldn't be required for boot any more, so you should be able to remove it.
> 
> I was also under the impression that on 4k drive the alignment should indeed be automatic.
> 
> I'd be interested to know if either of these are not the case as they are things we should look at fixing if not.
> 
>    Regards
>    Steve
> 
> On 27/12/2014 16:34, krad wrote:
>> you will probably need to update the zpool.cache as the one on the rootfs
>> you copied will have the details of the old pool in. You shouldnt need and
>> entries in the loader.conf as all they do is override the bootfs flags much
>> like rc.conf.local does to rc.conf entries
>> 
>> On 27 December 2014 at 16:10, Dr Josef Karthauser <joe at karthauser.co.uk>
>> wrote:
>> 
>>> Ahha, the 4k alignment is plausible! I thought that that was automatic
>>> these days. I'll give it a go.
>>> 
>>> Do I also need to have a zfs pool cache on the root disk?
>>> 
>>> Joe
>>> 
>>> 
>>> On 27 Dec 2014 at 3:27:47 pm GMT, Warren Block <wblock at wonkity.com> wrote:
>>> 
>>>> On Sat, 27 Dec 2014, Dr Josef Karthauser wrote:
>>>> 
>>>>> I?m trying to create a new ZFS pool from an existing one (the new one
>>> is 4k aligned and the old one is legacy 512b).
>>>>> But, I can?t get it to boot! Not sure what I?m doing wrong.
>>>>> 
>>>>> I thought I could create the new pool, and use ?zfs send/recv? to copy
>>> the existing pool and then boot onto the new disk, but the kernel doesn?t
>>> load? :(.
>>>>> Does anyone know what I?m doing wrong?
>>>>> 
>>>>> Here?s my recipe:
>>>>> 
>>>>>     # gpart create -s gpt diskid/DISK-NEW-DISK
>>>>>     # gpart add -s 64K -t freebsd-boot diskid/DISK-NEW-DISK
>>>>>     # gpart add -t 8G freebsd-swap diskid/DISK-NEW-DISK
>>>>>     # gpart add -t freebsd-zfs diskid/DISK-NEW-DISK
>>>>>     # gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1
>>> diskid/DISK-NEW-DISK
>>>> Those partitions are probably not aligned to 4K.  Add "-a4k" to the
>>> gpart add commands.  (Remember that ashift is filesystem block size, not
>>> alignment.)
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