Western Digital RE4 500GB (WD5003ABYX)

Dual Actuator technology - a head positioning system with 2 actuators that improves positional accuracy over the data tracks StableTrac - the motor shaft is secured at both ends to reduce system-induced vibration and stabilize platters for accurate tracking during read and write operations Thermal extended burn-in test - each drive is put through extended testing with thermal cycling to ensure reliable operation No touch ramp load technology - the recording head never touches the disk media ensuring significantly less wear Multi-axis shock sensor - automatically detects the subtlest shock events and compensates to protect the data

Western Digital – Wd Black 500gb 7200rpm SATA II 64mb, WD5003ABYX (Sata II 64mb)