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Date:      Wed, 23 Feb 2022 21:27:45 -0600
From:      Larry Rosenman <ler@lerctr.org>
To:        Alexander Motin <mav@freebsd.org>
Cc:        Freebsd current <freebsd-current@freebsd.org>
Subject:   Re: ZFS PANIC: HELP.
Message-ID:  <2bc12c9ee3e6dd71b65079116ff2b845@lerctr.org>
In-Reply-To: <7abcbe88-446f-44b9-c3a7-0997d3430b57@FreeBSD.org>
References:  <07c0c9c34b4a4133acab597c96867d27@lerctr.org> <95c7c326-e2f9-6e66-7b97-b9fb2671f4ad@FreeBSD.org> <1b6b2017ba69e6fda1ca237c3016ac61@lerctr.org> <a5f379a6-c2bd-f1e9-a281-bb657f3ccb75@FreeBSD.org> <6182c57bf1859482e72af78037c399e4@lerctr.org> <7abcbe88-446f-44b9-c3a7-0997d3430b57@FreeBSD.org>

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On 02/23/2022 9:15 pm, Alexander Motin wrote:
> On 23.02.2022 22:01, Larry Rosenman wrote:
>> On 02/23/2022 8:58 pm, Alexander Motin wrote:
>>> On 23.02.2022 21:52, Larry Rosenman wrote:
>>>> On 02/23/2022 8:41 pm, Alexander Motin wrote:
>>>>> Hi Larry,
>>>>> 
>>>>> The panic you are getting is an assertion, enabled by kernel built
>>>>> with INVARIANTS option.  On 13 you may just not have that debugging
>>>>> enabled to hit the issue.  But that may be only a consequence.
>>>>> Original problem I guess in possibly corrupted ZFS intent log 
>>>>> records
>>>>> (or false positive), that could happen so due to use of -F recovery
>>>>> option on `zpool import`, that supposed to try import pool at 
>>>>> earlier
>>>>> transaction group if there is some metadata corruption found.  It 
>>>>> is
>>>>> not supposed to work 100% and only a last resort.  Though may be 
>>>>> that
>>>>> assertion is just excessively strict for that specific recovery 
>>>>> case.
>>>>> If as you say pool can be imported and scrubbed on 13, then I'd 
>>>>> expect
>>>>> following clean export should allow later import on 14 without -F.
>>>>> 
>>>>> On 23.02.2022 21:21, Larry Rosenman wrote:
>>>>>> 
>>>>>> 've got my main dev box that crashes on 14 with the screen shot at 
>>>>>> https://www.lerctr.org/~ler/14-zfs-crash.png.
>>>>>> Booting from a 13-REL USB installer it imports and scrubs.
>>>>>> 
>>>>>> Ideas?
>>>>>> 
>>>>>> I can either video conference with shared screen or give access to 
>>>>>> the console via my Dominion KVM.
>>>>>> 
>>>>>> Any help/ideas/etc welcome I really need to get this box back.
>>>>>> 
>>>>>> 
>>>> How can I import the pool withOUT it mounting the FileSystems so I 
>>>> can export it cleanly on the 13 system?
>>> 
>>> Why do you need to import without mounting file systems?  I think you
>>> may actually wish them to be mounted to replay their ZILs.  Just use
>>> -R option to mount file systems in some different place.
>> 
>> I get the errors shown at:
>> https://www.lerctr.org/~ler/14-mount-R-output.png
>> 
>> Should I worry?  Or do something(tm) here?
> 
> This looks weird, but may possibly depend on mount points topology,
> whether /mnt is writable, etc.  What happen if you export it now and
> try to import it in normal way on 14 without -F?

It crashes just after root mount (this is the boot pool and only pool on 
the system),
seeL
https://www.lerctr.org/~ler/14-BOOT-Crash.png


-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640                 E-Mail: ler@lerctr.org
US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106



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