[zfs-discuss] cannot import 'home': I/O error Destroy and re-create the pool from a backup source

Anton Gubar'kov anton.gubarkov at gmail.com
Sun Apr 22 16:27:54 EDT 2018


To clarify a bit, the datasets in the pool have a lot of snapshots
already via autosnapshot feature, so no new snapshots are required for
sending. I would be able to send to another host with zfs over the net
and/or via a usb connected drive with zfs once I can import the pool.
Anton. 
В Вс, 22/04/2018 в 22:23 +0200, Daniel Armengod via zfs-discuss пишет:
> Hi Gregor,
> 
> Why is zfs send a potentially dangerous operation? If the pool was
> imported with -o readonly, and you can send the filesystem without
> snapshotting it first, does it introduce extra risk vs dd-ing the
> whole
> drive away? I'm assuming the stream is sent to a machine over the
> network.
> 
> Daniel
> 
> On 2018-04-21 22:57, Gregor Kopka (@zfs-discuss) via zfs-discuss
> wrote:
> > Am 21.04.2018 um 19:36 schrieb Anton Gubar'kov via zfs-discuss:
> > > I have no further backups
> > > I would like to recover this pool as it contains some valuable
> > > data I
> > > cannot reproduce ever (video archive).
> > 
> > 1) Power down the system
> > 2) obtain 6 new drives of same or bigger size
> > 3) dd/dd_rescue the old to the new drives
> > 4) disconnect the original drives
> > 5) do any recovery attempts on the copies
> > 
> > After reviving the pool (getting back access to your data) you can
> > either revive the other set of drives with the method that was
> > successful on the copies or create a fresh pool out of them,
> > preferable
> > on another machine, to have a second backup.
> > 
> > As a note for after the problem has been solved: Never use zfs send
> > -R/-p or zfs recv -F when dealing with backups (as these are able
> > to
> > destroy more than you want).
> > 
> > Gregor
> > 
> > _______________________________________________
> > zfs-discuss mailing list
> > zfs-discuss at list.zfsonlinux.org
> > http://list.zfsonlinux.org/cgi-bin/mailman/listinfo/zfs-discuss
> 
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at list.zfsonlinux.org
> http://list.zfsonlinux.org/cgi-bin/mailman/listinfo/zfs-discuss
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.zfsonlinux.org/pipermail/zfs-discuss/attachments/20180422/3aa6d1d1/attachment.html>


More information about the zfs-discuss mailing list