Date: Tue, 16 May 2017 21:53:17 -0400 From: Paul Kraus <paul@kraus-haus.org> To: "Eric A. Borisch" <eborisch@gmail.com>, "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Cc: =?utf-8?Q?Trond_Endrest=C3=B8l?= <Trond.Endrestol@fagskolen.gjovik.no>, FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: zpool imported twice with different names (was Re: Fwd: ZFS) Message-ID: <2318D9EB-4271-42C8-AEDB-4BB86607BB3D@kraus-haus.org> In-Reply-To: <CAASnNnrwTuJkMG2p%2BcXoKVfRQKnA5NccRGodwNUdCyG5j-L_LA@mail.gmail.com> References: <7c059678-4af4-f0c9-ff3b-c6266e02fb7a@gmx.com> <adf4ab9f-72f1-ed0f-fee2-82caba3af4a4@gmx.com> <ca7b47a7-7512-3cbb-d47b-6ef546dffd74@gmx.com> <alpine.BSF.2.21.1705160825130.40966@mail.fig.ol.no> <CAASnNnrwTuJkMG2p%2BcXoKVfRQKnA5NccRGodwNUdCyG5j-L_LA@mail.gmail.com>
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> On May 16, 2017, at 10:26 AM, Eric A. Borisch <eborisch@gmail.com> wrote: > > On Tue, May 16, 2017 at 1:31 AM, Trond Endrestøl < > Trond.Endrestol@fagskolen.gjovik.no> wrote: > >> I guess you had a /boot/zfs/zpool.cache file referring to the original >> zroot pool. Next, the kernel found the vega pool and didn't realise >> these two pools are the very same. >> > > Assuming this is the case, shouldn't it be fixed? A check while importing > that the guid of the pool targeted for import is not in the set of > currently active guids would be worthwhile, but it -- apparently, if this > is reproducible -- doesn't exist? When you use the -f (force) flag all bets are off. The assumption is that you _know_ it is safe to import the zpool as commanded. In this case, it was not. Many sysadmins I know have gotten into the sloppy (in my opinion) habit of using the force option (for various things) all the time. The force flag, whether it be on a zpool import or a kill -9 should be the last resort when the non-forced command fails.
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