Sans Digital EliteNAS 1U 4 Bay Intel Xeon NAS + iSCSI with Redundant Power Rackmount Server EN104L+XR (Silver) Linux based OS specifically made for NAS application Xeon 3040 1 84GHz Dual Core CPU with 2MB Cache or above 2GB DDR2 Memory or above, upgradeable to 4GB maximum Supports latest 2TB SATA II hard drive Up to 8TB of storage capacity Supports built-in RAID 0, 1, 1+0, 5 and 6 with spare