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

[Eric A. Borisch]

On Wed, May 17, 2017 at 9:38 PM, Eric A. Borisch <eborisch at gmail.com> wrote:

> 4) zpool import -f alpha beta succeeds without any complaints.
>
> IV. Alpha no longer exists, Beta exists (with the same GUID as Alpha) AND
> is active. This is an 'atomic' operation from user's point of view, and at
> no point does zpool list show more than one pool
>
> 5) zpool list shows only beta; scrubs fine, life is good..
>
> V. Beta exists on disk and is active and healthy. Alpha is no more.
> (Except as a ghost in a cache file)
>

A quick test revealed one other tidbit this morning; if I 'zpool export
beta' at this point in the process (still in live CD OS), everything is OK
on reboot into the installed OS.

For whoever wants to investigate handling/hand-off between
bootloader/kernel/fully booted, the problem appears when a:

1) root pool is renamed, but not 'zpool export'-ed after rename via an
'external' OS (live CD)
** and **
2) A stale zpool.cache file exists on the pool referring to the original
name.

 - Eric