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+# open encrypted partition /dev/sdb1 (reachable at /dev/mapper/backup)
+cryptsetup open --type luks /dev/sdb1 backup
+
+# open encrypted partition /dev/sdb1 using a keyfile (reachable at /dev/mapper/hdd)
+cryptsetup open --type luks --key-file hdd.key /dev/sdb1 hdd
+
+# close luks container at /dev/mapper/hdd
+cryptsetup close hdd
+
+# create encrypted disk
+cryptsetup luksFormat --type luks2 /dev/sdd