In message <1c2abfa3-df73-91cb-79da-c34eaeca3...@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:
# mkfile 64M /root/features
# mkfile 64M /root/version28
# zpool create features /root/features
# zpool create -d -o version=28 version28 /root/version28
# zfs create features/test
# zfs create version28/test
# dd if=/dev/urandom of=/features/test/wee bs=1024k count=16
# md5sum /features/test/wee
# cp /features/test/wee /version28/test/
# md5sum /version28/test/wee
# zfs snapshot features/test@foo
# zfs snapshot version28/test@bar
# zfs send features/test@foo>features.snapshot
# zfs send version28/test@bar>version28.snapshot

copy the snapshots to today's OI, illumos-533d257436

# zfs receive -v rpool/features< features.snapshot
# zfs receive -v rpool/version28< version28.snapshot
# md5sum rpool/features/test/wee
# md5sum rpool/version28/test/wee

John
groenv...@acm.org

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