def METHOD_NAME():
    """
    Prepare running domain and do blockcopy
    """
    test.log.info("TEST_SETUP1:Start vm and clean exist copy file")
    test_obj.backingchain_common_setup(remove_file=True,
                                       file_path=tmp_copy_path)
    test.log.info("TEST_SETUP2:Do blockcopy")
    cmd = "blockcopy %s %s %s --wait --verbose --transient-job " \
          "--bandwidth %s " % (vm_name, dev, tmp_copy_path, bandwidth)
    virsh_session = virsh.VirshSession(virsh_exec=virsh.VIRSH_EXEC,
                                       auto_close=True)
    virsh_session.sendline(cmd)