Helle

Hello
Here is the access sequence to the encrypted partition from another O.S.

zpool import  -N -R /ZFS rpool && sleep 10  
if [ -e /dev/zvol/rpool/keystore ]  ; then 
    cryptsetup -v open /dev/zvol/rpool/keystore keystore-rpool  && sleep 10
    mkdir -p /run/keystore/rpool
    mount -v /dev/mapper/keystore-rpool  /run/keystore/rpool && sleep 10
fi


Here is an encrypted partition release sequence from another O.S. which 
prevents the boot of the encrypted partition
 shutdown   or crash of O.S.


Another
zpool export rpool && shutdown


Antoher 
umount -v /run/keystore/rpool && sleep 5
cryptsetup -v close /dev/mapper/keystore-rpool && sleep 5
zpool export rpool 
shutdown


Here is the correct sequence of freeing encrypted partition from another O.S. 
which allows the boot of the encrypted partition.
But first you have to go through the recovery option.
There's probably a better solution.
umount -v /run/keystore/rpool && sleep 5
cryptsetup -v luksClose /dev/mapper/keystore-rpool && sleep 5
zpool export rpool && zpool list
shutdown

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https://bugs.launchpad.net/bugs/1962061

Title:
  ZFS Key load error: Failed to open key material file: No such file or
  directory

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