The CentOS v5u1 x86_64 and i386 builds for LIO-Target is available from
The current 2.9.0.209 builds have been running stable using LVM and MD RAID SATA and are providing LIO cluster services.
There are also older versions of LIO-Target builds for CentOS 5 and 4.
The Open/iSCSI iSCSI Initiator is comes pre-installed on CentOS 5. Here are some pointers: