does anyone know of an affordable shared storage solution for this?
I know that SCSI can operate on a shared bus for 2 nodes, but I'd really like to test out Oracle 9i Real Application Cluster (RAC) (formally Parallel Server) on a 4 node setup on Linux - but would need a shared storage device for log files, data files, control files.

FC would be a little pricey.
NetApp filers are outta my league.
thanks.