Date: Fri, 28 Apr 2017 17:53:20 -0400 From: Ultima <ultima1252@gmail.com> To: Paul Macdonald <paul@ifdnrg.com> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: A seperate ZFS question Message-ID: <CANJ8om5HUH68JQyVDS4d8bEHvAHQ12SFrisScLFG4m3UUp-wcQ@mail.gmail.com> In-Reply-To: <480833b2-d630-a703-ecd0-3281ed49a738@ifdnrg.com> References: <adb1b78d-2e03-d561-dac2-7c5da9a53a1c@ifdnrg.com> <alpine.BSF.2.20.1704281532300.10691@mail.fig.ol.no> <20170428155105.563a2ee5192bb8a08f76ca9d@sohara.org> <480833b2-d630-a703-ecd0-3281ed49a738@ifdnrg.com>
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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 <paul@ifdnrg.com> 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 <Trond.Endrestol@fagskolen.gjovik.no> 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"
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