Re: ZFS Permanent error <0xffffffffffffffff>:<0x0>

From: CyberLeo Kitsana <cyberleo_at_cyberleo.net>
Date: Tue, 29 Nov 2022 16:45:41 UTC
On 11/27/22 02:11, Andrea Venturoli wrote:
> Hello.
> 
> Yesterday, out of the blue, on a 13.1/amd64 machine, something went 
> wrong in one of my zpools, as I discovered from daily run mails.

<snip>

>> errors: Permanent errors have been detected in the following files:
>>
>>         <0xffffffffffffffff>:<0x0>
> 
> I don't think there's a "file in question" I can restore, as 
> "<0xffffffffffffffff>:<0x0>" doesn't seem to identify any.
> 
> I searched and found some bugs/discussion, but none lead to a definitive 
> answer.
> 
>  From logs and SMART, I don't think I had any hadware problem.
> 
> How much should I be worried?
> Any hint on how to solve this (apart from obviously recreate the pool 
> from scracth, after a backup)?

These error reports will persist, even after the underlying problem is 
corrected, until you tell ZFS that they have been corrected using 'zpool 
clear'.

I would suggest clearing the errors using zpool clear and then running a 
scrub to make sure there are no other errors lurking. If the errors 
don't return during a scrub, they were probably either transient or 
already corrected by the underlying hardware.

-- 
Fuzzy love,
-CyberLeo


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