Getting ZFS pools back.

Jan Knepper jan at
Sun Apr 29 18:37:26 UTC 2018

On 04/29/2018 14:32, Willem Jan Withagen wrote:
> On 29/04/2018 19:57, Jan Knepper wrote:
>> On 04/29/2018 13:27, Willem Jan Withagen wrote:
>>> Trouble started when I installed (freebsd-update) 11.1 over a 
>>> running 10.4. Which is sort of scarry?
>> This does sounds 'scary' as I am planning to do this in the (near) 
>> future...
>> Has anyone else experienced issues like this?
>> Generally I do build the new system software on a running system, but 
>> then go to single user mode to perform the actual install.
>> I have done many upgrades like that over 18 or so years and never 
>> seen or heard of an issue alike this.
> Most of my upgrades went smooth, other than being pestered by files 
> that are only changed in verssion no and/or comments.
Yeah... Know about those... mergemaster has a option to elevate some of 
that pain though...
> This is a rather old server that I installed zfs-on-root, when there 
> were only howtos and no automagic installers. So I guess that it might 
> even be from the 9.x days. It went through several manual upgrades and 
> at least once a online disk replacement with growing disks (500G to 4T).
> Al that went well, but could very well be that some odd bits and pieces
> were (missing) left overs.
OK... That might explain a thing or two... I do recall installing 9.x I 
think on a new server (hardware) and having to do the ZFS setup 
manually... Everything currently runs 10.x
> So Don't excluded that there is pilot error involved.
> I tried Google to find more about fixing the system when this error 
> got reported, but only a rather hefty session with Andriy Gapon, I think.
> And that was for 9.x or so.
> Nothing else...
> So given my need to go on, I just reinstalled.
OK! Thank you for letting me know!

Jan Knepper

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