ZFS Root Mount Failure

krad kraduk at gmail.com
Tue Nov 4 14:46:28 UTC 2014


check you the file system you have the hosts the vdi files hasnt filled up.
If it has it can often send the disk into read only mode. Ive had this
happen a few times on my test rig

On 3 November 2014 19:05, Stephen R Guglielmo <srguglielmo at gmail.com> wrote:

>
>
> On October 29, 2014 4:49:55 AM EDT, Erik Gustafson <
> gustafson.erik at gmail.com> wrote:
> >On Tue, Oct 28, 2014 at 10:40 PM, Stephen R Guglielmo
> ><srguglielmo at gmail.com
> >> wrote:
> >
> >> Hey list,
> >>
> >> I have a machine running ZFS on root. It stopped responding this
> >morning,
> >> and upon a reboot, it was unable to mount root from zfs:zroot. It
> >gave the
> >> explanation of "error 5."
> >>
> >> I played with the mount prompt briefly, but didn't get anywhere. Any
> >tips
> >> for diagnosing and fixing the problem?
> >>
> >
> >I had a similar issue recently. Error 5 on mount root. This was in
> >virtaulbox after some sort of unexpected shutdown.
> >To resolve i first made a snapshot in virtualbox
> >booted from freebsd-disc1.iso (install dvd)
> >zpool import
> >reboot (and boot from zroot)
> >zpool scrub
> >
> >zpool scrub said that i was going to loose some recently written data
> >(generated by nightly poudrire build)
> >I don't remember all, probably I needed some parameter to zpool import
> >but
> >all error messages were helpful it was quite easy to get it working
> >again.
> >
> >Good luck and don't forget the backup/snapshot
>
> Erik,
>
> Thanks for the help! I was able to boot from a FreeBSD 10 CD. I got into
> the LiveCD shell and imported the zpool with no problems. It said my 4
> disks were online. I then rebooted, however I got the same error at the
> mountroot prompt: "Mounting from zfs:zroot failed with error 5."
>
> I'll try to play a bit more, maybe scrubbing it or something from the
> livecd.
>
> Thanks,
> Steve
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