ZFS snapshot restore not quite working; missing steps?

[krad]

put it in sysctl.conf

its only really needed at pool creation time anyhow, once the pool is built
the ashift is set


On 20 May 2014 13:49, Michael Jung <mikej at mikej.com> wrote:

> On , Steven Hartland wrote:
>
>> ----- Original Message ----- From: "Jeff Chan" <jeffc at supranet.net>
>>
>>
>>  Update: using the most current FreeBSD 9.0 - 9.2 ZFS instructions
>>> on the wiki page for the initial configuration caused the booting
>>> to ZFS to work:
>>>
>>> https://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/9.0-RELEASE
>>>
>>> including the GNOP trick, since these drives are "advanced format" and
>>> greater than 2TB size, and the -a 4k alignment to 4k sectors when
>>> creating the ZFS partitions.
>>>
>>
>> On later versions you can set vfs.zfs.min_auto_ashift=12 to achieve the
>> same thing as the GNOP trick, but thats only needed if your drive doesn't
>> have a 4k quirk in our codebase.
>>
>>    Regards
>>    Steve
>> _______________________________________________
>> freebsd-fs at freebsd.org mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-fs
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>>
>
>
>
> Steve,
>
> FreeBSD firewall 10.0-STABLE FreeBSD 10.0-STABLE #0 r266313: Sat May 17
> 11:52:18 EDT 2014     root at firewall:/usr/obj/usr/src/sys/VT  amd64
>
>
> Even though /boot/loader.conf contains vfs.zfs.min_auto_ashift=12 the
> value does not get set.
>
> [mikej at firewall ~]$ cat /boot/loader.conf
> zfs_load="YES"
> kern.maxswzone=16777216
> vfs.zfs.min_auto_ashift=12
> [mikej at firewall ~]$
>
>
> [mikej at firewall ~]$ sysctl -a | grep ashift
> vfs.zfs.max_auto_ashift: 13
> vfs.zfs.min_auto_ashift: 9
> [mikej at firewall ~]$
>
>
> Regards,
> --mikej
>
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>