Date: Thu, 22 Dec 2011 09:15:28 +1100 From: Peter Jeremy <peterjeremy@acm.org> To: krad <kraduk@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS: root pool considerations, multiple pools on the same disk Message-ID: <20111221221527.GA83643@server.vk2pj.dyndns.org> In-Reply-To: <CALfReycwKv2=t0y7k-DJSa7O_cou6zaoH4J3RQH_6mYkG4FR=g@mail.gmail.com> References: <4EEF321E.5090806@barafranca.com> <20111220075714.GA35787@server.vk2pj.dyndns.org> <CALfReycwKv2=t0y7k-DJSa7O_cou6zaoH4J3RQH_6mYkG4FR=g@mail.gmail.com>
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--vtzGhvizbBRQ85DL Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2011-Dec-20 12:53:59 +0000, krad <kraduk@gmail.com> wrote: >even easier option might just be to boot off a flash drive with a minimal >installation on. then mount all the writable parts of the system off the >pool (/tmp. var. home etc.) along with any meatier bits if the installation >etc databases. If you have the flash drive and spare ports, this may be an option but I would not recommend relying on USB. And note that, unless you use noatime or explicitly mount R/O, just accessing files will trigger writes. >As you can see I create a new root fs every time I make world so rolling >back is fairly easy Until you get the dreaded "ZFS: i/o error - all block copies unavailable" error from the bootloader. That appears to occur at the pool level so multiple BEs within the pool may not help. That said, your approach looks interesting - have you written up what you do and have tried booting from different roots? --=20 Peter Jeremy --vtzGhvizbBRQ85DL Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iEYEARECAAYFAk7yWn8ACgkQ/opHv/APuIea5QCfesCVsVgTbEM4DGIlaE1KtDXF H/UAoJOzxMhPWB801DxPLo1/iNzh1mtG =tnOi -----END PGP SIGNATURE----- --vtzGhvizbBRQ85DL--
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