Give labels to partitions:
For ext2/ext3/ext4 partitions:
e2label /dev/XXX <label>
For FAT/VFAT partitions:
fatlabel /dev/XXX <label>
For ntfs partitions:
ntfslabel /dev/XXX <label>
For swap partitions:
swaplabel /dev/XXX <label>
Dump (or clone) a disk:
dd if=<source_file_name> of=<target_file_name>
Example
dd if =/dev/sda of=/homepi/cloning/name_of_image.img