Date: Sun, 12 Apr 2015 13:01:51 +0930 From: Shane Ambler <FreeBSD@ShaneWare.Biz> To: javocado <javocado@gmail.com>, FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: Re: Migrating ZFS from 8.3 to 10.1 Message-ID: <5529E727.9050800@ShaneWare.Biz> In-Reply-To: <CAP1HOmSwTw_pd_UUu9BcwUe2eeG5Uxv7O5iK62S_Mcb-WKzmPg@mail.gmail.com> References: <CAP1HOmSwTw_pd_UUu9BcwUe2eeG5Uxv7O5iK62S_Mcb-WKzmPg@mail.gmail.com>
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On 11/04/2015 07:13, javocado wrote: > Hello, > > I am planning to migrate (upgrade) my system from FreeBSD 8.3 RELEASE to > 10.1 RELEASE (both amd64). My zfs pool exists on it's own physical > device(s) so my upgrade will consist of: > > 1. install FreeBSD 10.1 on boot device (in a temp system) > 2. remove 8.3 boot device (from production system) > 3. install new 10.1 boot device and boot up production system > 4. re-mount zfs FS > > My question is, what do I need to know about how this change will affect or > impact the zpool and datasets? Is there any chance zfs data could be lost > or destroyed? Might there be a performance loss due to version differences? > Is upgrading the zpool (once booted to 10.1) strongly advised? Any > downsides or dangers there? Once you upgrade your zpool in 10.1 you can't mount it in < 10.1 I think you can selectively enable features if you want to keep old system compatibility. Not sure if there is a list of what features are available for each system version. Exporting your zpool as you shutdown 8.x will make it easier to import into 10.1 > Some other info worth considering (production system): > > ZFS filesystem version 5 > ZFS storage pool version 28 > > Thanks! -- FreeBSD - the place to B...Storing Data Shane Ambler
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