Internal Hard Drives Standard Compliance: IEEE802.3ab / IEEE802.3u / IEEE802.3 Standard (1000BASE-T / 100BASE-TX / 10BASE-T) Data Transfer Rates: 10 / 100 / 1000 Mbps Connector Type: RJ-45 Number of Ports: 1 Number of Drives: 4 Drive Interface: SATA Hard Drive Sizes: 250GB, 500GB Total Capacity: 1.0 TB, 2.0 TB Rotational Speed: 7200 RPM Interface Standard Compliance: USB 2.0 Connector Type: USB Series A Number of Ports: 2 Data Transfer Rates: Max: 480 Mbps (High Speed Mode), Max: 12 Mbps (Full Speed Mode) Protocol Support: Networking TCP/IP, File Sharing SMB, FTP, Directory Integration LDAP, Management HTTP, Time Syncronization NTP Dimensions (WxHxD in.): 6.69 x 12.2 x 9.25 Weight (lbs): 16.1 Operating Environment (Fahrenheit): 32-95° Setup Utility OS Support: Windows Operating Systems Client OS Support: Windows® XP, Windows® 2000, Windows® Me, Windows® NT 4.0, Windows® 98 SE, Linux (SMB) Power Supply: internal, AC100V 50/60 H