1 - Shrink physical volume on /dev/mapper/cr_test from 16.00 GiB to 8.00 GiB -> 2
2 - Shrink encryption layer device on /dev/mapper/cr_test from 16.00 GiB to 8.00 GiB -> 3
3 - Shrink partition /dev/sdb1 from 16.00 GiB to 8.00 GiB ->
