zfs corruption after controller failure
Fervent Dissent
walkerindarkness at gmail.com
Tue Jan 6 15:35:37 UTC 2015
# zpool import -d /dev/diskid/
#
no error, no import
# zpool import -d /dev/diskid/ -N -o readonly=on -f -R /tb -F -T 3697688 tb
cannot import 'tb': no such pool available
tb is the pool name, I'll try those scripts later
On Tue, Jan 6, 2015 at 11:29 PM, InterNetX - Juergen Gotteswinter <
jg at internetx.com> wrote:
> -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 at internetx.com <mailto:jg at 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 at ultra-secure.de <mailto:rainer at ultra-secure.de>>
> > > wrote:
> > >
> > >>
> > >>> Am 06.01.2015 um 15:58 schrieb Fervent Dissent <
> > >> walkerindarkness at gmail.com <mailto:walkerindarkness at 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…
> > >>
> > >>
> > >>
> > >>
> > > _______________________________________________
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> >
> >
>
>
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