From owner-freebsd-questions@freebsd.org Fri Apr 28 21:53:22 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 04372D54518 for ; Fri, 28 Apr 2017 21:53:22 +0000 (UTC) (envelope-from ultima1252@gmail.com) Received: from mail-yw0-x22c.google.com (mail-yw0-x22c.google.com [IPv6:2607:f8b0:4002:c05::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B57BAEC for ; Fri, 28 Apr 2017 21:53:21 +0000 (UTC) (envelope-from ultima1252@gmail.com) Received: by mail-yw0-x22c.google.com with SMTP id u70so37195883ywe.2 for ; Fri, 28 Apr 2017 14:53:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=JWnbaLb4Hc91/sZUnLTD6fSHMl1gnakLElQ/iFZh4hQ=; b=KQc0PBWfXhEjy+ttWcN4lafDoXcbUxLJsbtm2US4+cyc/COKXtducwvS/lyro5VmNf y2sv1SPfn7q1sUBFnoL5bf55gkJDmuFVJ3PmSQIAu7QZJ6ezYr5pBiTd/jMuTP/+8yno WdBjEZz+n5aySnyF+HqRsZBd/EvqwaqbO2V/yxyEpyUga5UfTOuQbh7c/gePUzGIIVmP fopk5SRVtwmFq4bnQrlWeYeTHmx1Eemn4kKW7IeFMg0cRwQTTRq3PnuqQVqA4zxy+irm oFXhNDLLZ0UYc7Hg/rO7uE/jLoWFd4ZHAXbLq+J9iBby3T8EuGRVFX40NPNsMYhL8Zjw xxdw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=JWnbaLb4Hc91/sZUnLTD6fSHMl1gnakLElQ/iFZh4hQ=; b=lcRELVfym2oN2Nhc+PEULnQ9wXo3learcdNsKCIyp1Acgg/leC+4YJxSW2+oSmfPo8 bBWoFC7W/E8nM4WIOt7gXBMVzgN2aS4nRd4JJ8oQmaslE2FGIYqxKPa4Zxh4I/BKbTzo 8/iy1taW8bfcGVM7ub5DYzovtNXSsolQn/0LyCv72Io3ZSRKQOhJDOvXziLbddc8INHZ XbvyrtN8u5ALhzH1w5am2kUiy9NOoeNqT5pOA2SL91nqS5I0aULLaHidTITHf1vEqQNo UBaxOd5Gdcrr0LGalDJL92BcnPYI95TAb52R+f/XKU/MU+/ZaE8/+9aOEgPW5CL34pe4 aNlg== X-Gm-Message-State: AN3rC/5ZUF9kSawEu6rt49b5aMAG5W26tjFe7SDtqPXyfNm+o1G/05ix d/UBtSRQv9H1ebHZqc+c2PbfUwzHZc4M6rg= X-Received: by 10.13.211.4 with SMTP id v4mr11531805ywd.143.1493416400908; Fri, 28 Apr 2017 14:53:20 -0700 (PDT) MIME-Version: 1.0 Received: by 10.129.72.144 with HTTP; Fri, 28 Apr 2017 14:53:20 -0700 (PDT) In-Reply-To: <480833b2-d630-a703-ecd0-3281ed49a738@ifdnrg.com> References: <20170428155105.563a2ee5192bb8a08f76ca9d@sohara.org> <480833b2-d630-a703-ecd0-3281ed49a738@ifdnrg.com> From: Ultima Date: Fri, 28 Apr 2017 17:53:20 -0400 Message-ID: Subject: Re: A seperate ZFS question To: Paul Macdonald Cc: FreeBSD Mailing List Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Apr 2017 21:53:22 -0000 You have a fairly small pool, I highest suggest fixing the issue instead of ignoring it. This kind of issue makes bad days worse when ignored. =3D[ If no spare drives are available, it maybe best to detach one of the mirror devices, create a new pool with the single drive, move the data to it, there have replies with good zfs send | zfs receive suggestions. After that is complete, destroy the old pool and attach/add (with -n first) destroyed pool's drives to your needs. You are still in a minimal damage/recovery opportunity, and I would most definitely suggest use it as a learning experience instead of putting it off. Whatever you decide, I wish you the best Ultima On Fri, Apr 28, 2017 at 5:19 PM, Paul Macdonald wrote: > > > On 28/04/2017 15:51, Steve O'Hara-Smith wrote: > >> On Fri, 28 Apr 2017 15:52:59 +0200 (CEST) >> Trond Endrest=C3=B8l wrote: >> >> On Fri, 28 Apr 2017 14:14+0100, Paul Macdonald wrote: >>> >>> I fat fingered adding a cache drive and was unable to remove the SSD >>>> cache drive (ada2) >>>> >>> First, you have gpt/zfs0 and ada1p3 in a mirrored configuration. Next, >>> you have ada2 striped (RAID 0) to the first pair of mirrors. This is a >>> very weird "RAID 1 + 0" combo. Guess what will happen when you lose >>> ada2! >>> >>> Maybe you should describe what you wanted to happen in the first >>> place. >>> >> He did, ada2 is supposed to be a cache drive, now it's a stripe. >> >> I suggest you make good backups of this pool, destroy it, recreate it >>> properly, and restore the missing data. >>> >> Agreed, you can't undo adding a stripe. >> >> > all this so far i knew, > > It's an entirely unwanted config, and i'll likely just migrate either the > data or the jails to another box, but i'd hoped to understand what the > config meant under ZFS: > > As i understand from comments, i have effectively created a mis-sized > RAID0 (stripe) between a SATA mirror set and a single SSD, > > i'm now very glad i didn't just unplug the SSD drive and instead added a > 2nd SSD for the actual cache > > So i guess i have until the SSD fails (or presumably until the SSD reache= s > its capacity to fix this) > > thanks to all for the comments/guidance > > Paul. > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe > @freebsd.org"