ZFS i/o error in recent 12.0

[Allan Jude]

On 2018-03-20 10:29, Andriy Gapon wrote:
> On 20/03/2018 09:09, Trond Endrestøl wrote:
>> This step has been big no-no in the past. Never leave your 
>> bootpool/rootpool in an exported state if you intend to boot from it. 
>> For all I know, this advice might be superstition for the present 
>> versions of FreeBSD.
> 
> Yes, it is.  That does not matter at all now.
> 
>> From what I can tell from the above, you never created a new 
>> zpool.cache and copied it to its rightful place.
> 
> For the _rooot_ pool zpool.cache does not matter as well.
> It matters only for auto-import of additional pools, if any.
> 

As I mentioned previously, the error reported by the user is before it
is even possible to read zpool.cache, so it is definitely not the source
of the problem.

-- 
Allan Jude