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Date:      Wed, 17 Feb 2010 15:03:49 -0600
From:      Scot Hetzel <swhetzel@gmail.com>
To:        Pegasus Mc Cleaft <ken@mthelicon.com>
Cc:        Chris <behrnetworks@gmail.com>, freebsd-current@freebsd.org
Subject:   Re: Seeing the dreaded "ZFS: i/o error - all block copies  unavailable" on 9.0-CURRENT
Message-ID:  <790a9fff1002171303u4b40a90cr626ef856efee473b@mail.gmail.com>
In-Reply-To: <201002171840.41088.ken@mthelicon.com>
References:  <64aa03031002161803h667734cal4d668b9eb9c0a1a8@mail.gmail.com> <790a9fff1002161842g17de8ecfvf2cfa8c77f03c32@mail.gmail.com> <64aa03031002161849s7b66b9e3l727aafd2afd3d596@mail.gmail.com> <201002171840.41088.ken@mthelicon.com>

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On Wed, Feb 17, 2010 at 12:40 PM, Pegasus Mc Cleaft <ken@mthelicon.com> wro=
te:
> Hello Chris, Scott & Current
>
> =A0 =A0 =A0 =A0I use gptzfsboot on my AMD64 (current) machine all the tim=
e and also on
> my laptop. I am not sure if this will cause the problem you are seeing bu=
t I
> know I ran into a lot of trouble depending on what type of pool I was
> creating.
>
> =A0 =A0 =A0 =A0I believe this is correct, and if I am not than I apologis=
e in advance,
> but....
>
> =A0 =A0 =A0 =A0If you are trying to boot off a linear type pool (A single=
 disk or a
> mirror) your bootable filing system has to be a zfs filing system beneath=
 the
> root pool (IE: zroot/boot). If you are trying to boot off a zraid pool, y=
our
> bootable filing system must be the root filing system of the pool (IE: zr=
oot)
>
> =A0 =A0 =A0 =A0You must also include the appropriate declaration in the
> /boot/loader.conf file:
>
> (for a zraid pool)
> zfs_load=3D"YES"
> vfs.root.mountfrom=3D"zfs:zpool"
>
> (for a linear type)
> zfs_load=3D"YES"
> vfs.root.mountfrom=3D"zfs:zpool/root"
>
> =A0 =A0 =A0 =A0If I try any other method, zboot explodes in a myriad of d=
ifferent ways.
>

Not sure why your zboot explodes, but I use a single disk and only use
the following in /boot/loader.conf:

zfs_load=3D"YES"
vfs.root.mountfrom=3D"zfs:zpool"

it should work with either zfs:zpool or zfs:zpool/root.

Scot



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