Date: Wed, 20 Nov 2013 19:55:34 +0100 (CET) From: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> To: =?UTF-8?Q?Jan_Du=C5=A1=C3=A1tko?= <jan@dusatko.org> Cc: freebsd-hackers@FreeBSD.org Subject: Re: ZFS pool cheating Message-ID: <alpine.BSF.2.00.1311201944490.26875@mail.fig.ol.no> In-Reply-To: <029f01cee610$4567f870$d037e950$@org> References: <029f01cee610$4567f870$d037e950$@org>
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On Wed, 20 Nov 2013 17:47+0100, Jan Du?átko wrote: > Dear, > Do you someone know method, how can be pool converted from concatenating to > regular mirror? By mistake I replaced failed disk in pool using add not > replace, which caused me to change pool configuration. > I looking method allow me to have pool online during whole replacement > procedure. > > Regards > > Jan I'm afraid your only option is something along these lines: 1. Make a recursive snapshot of the entire pool. 2. Send a recursive ZFS stream of the recursive snapshots to another pool, or disk. Beware of the danger of data loss by having only a single set of snapshots available as you proceed. 3. Destroy the old pool. 4. Recreate the original pool to a mirrored configuration. 5. Transfer the recursive ZFS stream back to the new pool using the zfs receive command. 6. Remove the recursive snapshots, if warranted. If your able to setup a fresh pair of disks in your server, you might be able to transfer the snapshots to a mirrored pool assigned a temporary name. Then export both the current pool and the temporary pool. Import the temporary pool and rename the pool to the correct name as you import the temp pool. I guess/hope someone more knowledgeable on ZFS will chime in and correct me. -- +-------------------------------+------------------------------------+ | Vennlig hilsen, | Best regards, | | Trond Endrestøl, | Trond Endrestøl, | | IT-ansvarlig, | System administrator, | | Fagskolen Innlandet, | Gjøvik Technical College, Norway, | | tlf. mob. 952 62 567, | Cellular...: +47 952 62 567, | | sentralbord 61 14 54 00. | Switchboard: +47 61 14 54 00. | +-------------------------------+------------------------------------+
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