dmsetup remove_all
wipefs -a --force /dev/sdb2
mkfs -t btrfs /dev/sdb2
mkdir -p /fs/sdb2
mount -t btrfs /dev/sdb2 /fs/sdb2
 "ln" "-sf" "/usr/bin/genisoimage" "/usr/bin/mkisofs"
 "./runltp" "-f" "dio-00" "-d" "/fs/sdb2/tmpdir"