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Date: Sat, 23 Jun 2012 10:35:51 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Michael Powell <nightrecon@hotmail.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Is ZFS production ready?
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> However, fsck'ing such large volumes will take considerable time if such a
> thing needs doing. There is the new "Soft-update plus Journaling" coming
> along with the advent of 9.x, which is supposed to ameliorate this. Not

it is far from perfect. But fine to use it.

Just DO full fsck every some time. Fortunately it would be planned outage 
instead of unplanned.