zpool imported twice with different names (was Re: Fwd: ZFS)

[Nikos Vassiliadis]

On 05/16/2017 04:26 PM, Eric A. Borisch wrote:
> On Tue, May 16, 2017 at 1:31 AM, Trond Endrestøl <
> Trond.Endrestol at fagskolen.gjovik.no> wrote:
> 
>> I guess you had a /boot/zfs/zpool.cache file referring to the original
>> zroot pool. Next, the kernel found the vega pool and didn't realise
>> these two pools are the very same.
>>
> 
> Assuming this is the case, shouldn't it be fixed? A check while importing
> that the guid of the pool targeted for import is not in the set of
> currently active guids would be worthwhile, but it -- apparently, if this
> is reproducible -- doesn't exist?
> 
> Again, assuming this is reproducible.
> 

It is reproducible. Except for a check in ZFS, I would also expect
that the device cannot be opened twice for writing, that is,
protected by GEOM.

Nikos