A shared disk system (Storage Area Network, or SAN) is recommended for your cluster if you want data to be highly available. If a shared disk subsystem is used, ensure the following:
The shared disk system is properly set up and functional according to the manufacturer’s instructions.
Novell recommends that the disks contained in the shared disk system are configured to use mirroring or RAID to add fault tolerance to the shared disk system.
If you are using iSCSI for shared disk system access, ensure that you have properly configured iSCSI initiators and targets.