WD Red WD30EFRX 3TB 3.5" Internal Hard Drive - SATA - 64 MB Buffer WD Red is designed specifically for small NAS systems that have 1 to 5 drive bays. The drives are designed and extensively tested for compatibility in the unique 24x7 operating environment and for the demanding system requirements of home and small office NAS.
WD Blue 6TB Desktop Hard Disk Drive - 5400 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch
IntelliSeek: Calculates optimum seek speeds to lower power consumption, noise and vibration.
Data LifeGuard: Advanced algorithms monitor your drive continuously so it stays in optimum health.
NoTouch Ramp Load Technology: Safely positions the recording head off the disk surface...