On 02/08/2024 19:09, John D Groenveld via illumos-discuss wrote:
> In message <1c2abfa3-df73-91cb-79da-c34eaeca3af7@kit.edu>, "Udo Grabowski (IMK)" writes:
>> Did some more testing, could also import it on an 8 years old pool
>> (illumos-a90d75b) with all the features (known at that time) active or enab=
>> led:
>
> I'm not able to reproduce.
> Here's my test procedure:
> Booted 151a8
> Created two pools:
> #...
> # zfs send version28/test@bar>version28.snapshot
>
> copy the snapshots to today's OI, illumos-533d257436
>

The snapshots are older than oi151a8, probably 151a2 or even from
pre-illumos Osol. On 151a8, I can import those, the youngest I could
test was Hipster 2018/04 where they still import. So the incompatibility
is rooted somewhere in commits of the last 6 years.
-- 
Dr.Udo Grabowski  Inst.of Meteorology & Climate Research IMK-ASF-SAT
https://www.imk-asf.kit.edu/english/sat.php
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