Western Digital AV-GP WD2500AVVS 250 GB Internal Hard Drive 3.0 GB/s SATA 3.5-inch 7200 RPM

3.5-inch Form Factor, 250GB Capacity, SATA 3.0 Gb/s8MB Cache, Buffer to Host 100 MB/s, Buffer to Disk 61 MB/s7200 RPM, MTBF 1000,000 Hours, Raid Specific Time Limited Error RecoveryFluid Dynamic Bearing to reduce Heat, Vibration and NoiseConserves Power Wi