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Update bpool creation note to reflect compatibility property. #461

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Oct 20, 2023
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Update bpool creation note to reflect compatibility property. #461

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18 changes: 9 additions & 9 deletions docs/Getting Started/Debian/Debian Bookworm Root on ZFS.rst
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Expand Up @@ -244,15 +244,15 @@ Step 2: Disk Formatting
-O canmount=off -O mountpoint=/boot -R /mnt \
bpool ${DISK}-part3

You should not need to customize any of the options for the boot pool.

GRUB does not support all of the zpool features. See ``spa_feature_names``
in `grub-core/fs/zfs/zfs.c
<http://git.savannah.gnu.org/cgit/grub.git/tree/grub-core/fs/zfs/zfs.c#n276>`__.
This step creates a separate boot pool for ``/boot`` with the features
limited to only those that GRUB supports, allowing the root pool to use
any/all features. Note that GRUB opens the pool read-only, so all
read-only compatible features are “supported” by GRUB.
*Note:* GRUB does not support all zpool features (see
``spa_feature_names`` in
`grub-core/fs/zfs/zfs.c <https://git.savannah.gnu.org/cgit/grub.git/tree/grub-core/fs/zfs/zfs.c#288>`_).
We create a separate zpool for ``/boot`` here, specifying the
``-o compatibility=grub2`` property which restricts the pool to only those
features that GRUB supports, allowing the root pool to use any/all features.

See the section on ``Compatibility feature sets`` in the ``zpool-features``
man page for more information.

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