Feature	Description
Physical
Formatted Capacity	320 072 MB
Used Sectors Per Drive	625 142 448
Interface	40-pin EIDE
Bytes Per Sector	512
Dimensions (H × L × W)	1.028 × 5.787 × 4.0 inches (25.4 × 147.0 × 101.6 mm)
Weight	1.32 lb. (0.60 kg) ± 10%
Performance
Data Transfer Rate (Maximum)	Buffer to Host: 100 MB/s (Mode 5 Ultra ATA) Buffer to Disk: 748 Mbits/s max
Average Read Seek	8.9 ms
Track-to-track Seek	2.0 ms (average)
Full Stroke Read Seek	21 ms (average)
Average Latency	4.2 ms
Rotational Speed	7200 RPM
Buffer	2 MB
Environmental Specifications
Shock	Operating (2 ms): 30G (write) 65G (read) Non-operating (2 ms): 300G (2-platter) 250G (3-platter) Half sine wave measured in 2 ms duration measured without isolation.
Vibration	Operating: Random: 0.004 g2/Hz (10 to 300 Hz) Linear: 20-300 Hz 0.75G (0 to peak) Non-operating: Linear: 5-20 Hz 0.195 inches (dbl amp) 20-500 Hz 4G (0 to peak)
Temperature	Operating: 5° C to 55° C Non-operating: -40° C to 65° C
Thermal Gradient	Operating: 20° C/hour (maximum) Non-operating: 30° C/hour (maximum)
Humidity	Operating: 5-95% RH non-condensing Non-operating: 5-95% RH non-condensing
Acoustics (average)	2-platter Idle Mode: 33 dBA average Seek Mode 0: 35 dBA Seek Mode 3: 34 dBA 3-platter Idle Mode: 34 dBA Seek Mode 0: 36dBA Seek Mode 3: 35dBA