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Date:      Sat, 14 Aug 2010 21:57:54 +0200
From:      Dick Hoogendijk <dick@nagual.nl>
To:        freebsd-questions@freebsd.org
Subject:   Re: ZFS not usable on FreeBSD-8.1
Message-ID:  <4C66F542.6090501@nagual.nl>
In-Reply-To: <19558.60756.860555.968721@gargle.gargle.HOWL>
References:  <4C669668.5040906@nagual.nl> <19558.60756.860555.968721@gargle.gargle.HOWL>

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  On 14-8-2010 21:24, George Hartzell wrote:
> You haven't provided enough information for me to make a concrete
> suggestion, but this kind of thing often seems to boil down to
> something getting confused over slices and partitions when they both
> have the same extent (start->end) on disk.  This used to bite me in
> the gmirror world until I learned to make the partition one block
> smaller than the slice it lived in.

And how do I make the partition precisely one block smaller than the 
slic it lives in?
How do I know what the "blocksize" is?

> Are you using explicit device names to add the disks to your pool?  If
> so you'll gain robustness by using labels, either glabels as described
> here:
>
>     http://submesa.com/data/bsd/zfs
>
> or if you're in the gpt world then gpt labels as described in the
> gpart commands illustrated here:
>
>     http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/Mirror
I tried both methods. I had the disks as GPT labeld ones and slices by 
sysinstall. None worked.
So it may be the one block difference. Please tell me how to do that.




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