LaCie Two Big with PCI-X Card 500GB + 250GB Spare Drive. Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: Serial ATA II. Weight: 2.5 kg, Width: 76 mm, Depth: 245 mm. LED indicators: System. Operating temperature range (T-T): 5 - 35 °C. Data transfer rate: 3 Gbit/s