Date: Tue, 06 Jan 2015 16:29:21 +0100 From: InterNetX - Juergen Gotteswinter <jg@internetx.com> To: Fervent Dissent <walkerindarkness@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: zfs corruption after controller failure Message-ID: <54ABFF51.50708@internetx.com> In-Reply-To: <CALpPS7N-YUhJZUXaeJPY4aks%2Bb_D1oLZ11%2BHxfHt2pnmJicaQw@mail.gmail.com> References: <CALpPS7NiHJQ09KmitupYyixRYbPtdvVbVRCOPAqXUtqmSd4BVw@mail.gmail.com> <20FB5F2C-65D2-4F33-8D45-DD7FC34A5E2E@ultra-secure.de> <CALpPS7MObKeFPFYL7dMiGcKG40tFmJELCo782rWPO8wqcGtwmw@mail.gmail.com> <54ABFA82.2070401@internetx.com> <CALpPS7N-YUhJZUXaeJPY4aks%2Bb_D1oLZ11%2BHxfHt2pnmJicaQw@mail.gmail.com>
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-T is an undocumentated and so for it should be considered as unstable or even something which can easily break things. theres a reason why its not documentated very likely. dl;dr - its something i whouldnt touch... What Output do you get from a simple zpool import ? You did everything you tried until now with "readonly=on" ? If everything seems to be broken, you could give the zfs forensic scripts a try... its already broken, cant get worse anymore. Am 06.01.2015 um 16:11 schrieb Fervent Dissent: > I tried these, and some variations of them, and it gave the error the > pool does not exist. > zpool import -N -o readonly=on -f -R /pool <pool> > zpool import -N -o readonly=on -f -R /pool -F -T <transaction_id> <pool> > > On Tue, Jan 6, 2015 at 11:08 PM, InterNetX - Juergen Gotteswinter > <jg@internetx.com <mailto:jg@internetx.com>> wrote: > > > external usb drive (for sure cheap consumer desktop one) > > cheap (maybe even buggy) usb controller > > non-mirrored / raidz > > probably cheap hardware at all (no ecc, like rainer mentioned for example) > > what do you expect. zfs is very tolerant, but some basics should be > taken care of... > > but even with a single disk it should be possible to recover / import > the pool at least read only > > > > Am 06.01.2015 um 16:06 schrieb Fervent Dissent: > > I've had power lose before and a previous bad controller cause > multiple > > problems. The drive would disappear or go offline. I would clear > it and go > > on no problem. This is the first failure that I have not been able to > > recover from. > > > > On Tue, Jan 6, 2015 at 11:01 PM, Rainer Duffner > <rainer@ultra-secure.de <mailto:rainer@ultra-secure.de>> > > wrote: > > > >> > >>> Am 06.01.2015 um 15:58 schrieb Fervent Dissent < > >> walkerindarkness@gmail.com <mailto:walkerindarkness@gmail.com>>: > >>> > >>> I have a external disk that was on a cheap usb controller, that > >> controller > >>> died. > >> > >> > >> Maybe I’m mistaken, but I though that if your pool only has a > single disk > >> and that disk/pool shows errors or becomes > unreadable/corrupted/whatever > >> you cannot recover it. > >> > >> Same for not using ECC memory… > >> > >> > >> > >> > > _______________________________________________ > > freebsd-fs@freebsd.org <mailto:freebsd-fs@freebsd.org> mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > > To unsubscribe, send any mail to > "freebsd-fs-unsubscribe@freebsd.org > <mailto:freebsd-fs-unsubscribe@freebsd.org>" > > > >
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