Problems with my HD

[Helber]

Hi all.   I�m having some phisical problems with my hard drive. How do I transfer all my data  from a hd to another. I wish to duplicate the hd and then change it. How is the easy way to do it? (sorry for my english).   Is there a way to work with two hard drives, something like master and slave, but the slave been a mirror of the master? Just to increase security, if the master fails the slave could substitute  the master.   thanks in advance