Netgear RNR4450 ReadyNAS 1100 2 TB Rackmount Network Storage with Dual Gigabit Ports (4x500GB) Patent Pending X-RAID&#8482; Technology automatically scales from 1 to 4 HDD with redundancy Hot-Swappable HDD design minimizes downtime (swap out drives on the fly) Complete RAID 0, 1, 5, X-RAID support Works natively with Windows, Macintosh, and Linux clients (CIFS/AFP 3.1/NFS v2 and v3); shares files across clients (For home use, Media server support for iTunes, UPnP AV and NETGEAR Digital Entertainer