Openfiler is a SAN/NAS appliance, based on rPath Linux, that joins impressive scalability and storage management capabilities with modest hardware requirements. Openfiler can talk to disk drives on IDE, SAS, SATA, SCSI, or iSCSI interfaces, and it's compatible with popular RAID hardware and Ethernet NICs, including 10 Gigabit controllers from Intel and Broadcom. It's a broad-shouldered storage system that requires some time to learn (or an Openfiler support package). Read the review.