From owner-freebsd-fs@FreeBSD.ORG  Tue May 20 05:14:43 2014
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Date: Mon, 19 May 2014 22:14:38 -0700
From: Jeff Chan <jeffc@supranet.net>
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To: "Steven Hartland" <killing@multiplay.co.uk>
Subject: Re: ZFS snapshot restore not quite working; missing steps?
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On Monday, May 19, 2014, 7:26:35 PM, Steven Hartland wrote:
> ----- Original Message -----=20
> From: "Jeff Chan" <jeffc@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:
>>=20
>> https://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/9.0-RELEASE
>>=20
>> 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=3D12 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.

Thanks Steve,
Do you have a reference for  vfs.zfs.min_auto_ashift=3D12?

Cheers,

Jeff C.
--
Jeff Chan
mailto:jeffc@supranet.net
http://www.jeffchan.com/