Date: Wed, 2 Sep 2009 17:44:45 +1000 From: Emil Mikulic <emikulic@gmail.com> To: Mark Stapper <stark@mapper.nl> Cc: Maciej Jan Broniarz <gausus@gausus.net>, freebsd-stable@freebsd.org, Miroslav Lachman <000.fbsd@quip.cz>, Thomas Backman <serenity@exscape.org> Subject: Re: zfs on gmirror slice Message-ID: <20090902074445.GA13588@dmr.ath.cx> In-Reply-To: <4A9E1CB5.6030906@mapper.nl> References: <a7454e2f0909010704g2fb27216hacb3ffd2cae5594c@mail.gmail.com> <061541E3-F301-46C4-8ECB-5B05854F0EAA@exscape.org> <a7454e2f0909010904s224be2ectdd18eb887f4c1311@mail.gmail.com> <4A9D558A.9070609@quip.cz> <4A9E1CB5.6030906@mapper.nl>
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On Wed, Sep 02, 2009 at 09:20:21AM +0200, Mark Stapper wrote: > updating a zfs filesystem which you are running from is next to > impossible. [citation needed] :) > So, i would recommend setting up gmirror to mirror your whole disks, > install the base system(boot and "world") on a small UFS slice, and use > the rest of the disc as zfs slice. As Thomas Backman pointed out, this means you won't get self-healing. I don't know if a ZFS mirror performs smarter disk access scheduling than gmirror. Someone oughta measure. ;) I recommend you (Maciej) do what Freddie Cash said: slice your disks into two pieces each - a gmirror'd UFS root, and the rest for ZFS. (or work out how to zfsboot) --Emil
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