The WD WD40EFAX from the WD Red series is specifically designed for NAS systems. It has been extensively tested for 24/7 continuous operation. Thanks to the special NASware firmware and 3D Active Balance Plus technology, the WD40EFAX enables seamless integration, high data security, and optimal performance for NAS and RAID environments. The WD40EFAX is designed for particularly low noise levels and low energy consumption, and it features the SATA 600 standard.