loop_dev2=`_create_loop_device $fs_img2`
loop_dev3=`_create_loop_device $fs_img3`
-$MKFS_BTRFS_PROG -m raid1 -d raid1 $loop_dev1 $loop_dev2 >>$seqres.full 2>&1
-$MOUNT_PROG -o ro $loop_dev1 $loop_mnt
+_mkfs_dev -m raid1 -d raid1 $loop_dev1 $loop_dev2 >>$seqres.full 2>&1
+_mount -o ro $loop_dev1 $loop_mnt
# Fail the second device and replace with the third
_destroy_loop_device $loop_dev2