First install iscsi-initiator-utils.x86_64
# yum -y install iscsi-initiator-utils.x86_64
Then perform a discovery
# iscsiadm -m discovery -t sendtargets -p datastor01.aossama.net
The output should look something like this
192.168.0.34:3260,1 iqn.2012-20.com.aossama:datastor01
Finally start iscsi and iscsid service.
# chkconfig iscsi on && chkconfig iscsid on
# service iscsi start && service iscsid start
Advanced tasks on iSCSI initiators in Part 2.