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+# zfs trouble live boot solution
+## zpool trouble you can mount it from live systeme
+
+boot on usb drive which permit zfs then :
+
+~~~
+zpool import -R /mnt rpool
+zfs load-key rpool
+zfs mount rpool/USERDATA/nomad_e8bdbt
+~~~
+
+## in case you wanted to change zpool passwd
+
+~~~{.shell}
+$ zfs change-key rpool
+~~~