Key Features

Massive capacity – Whether they are in an external drive or a notebook computer, WD’s 320 GB 2.5-inch drives offer the most available capacity for space-hungry operating systems like Windows Vista™, plus plenty of room left over for photos, music, and video.

Fast and Efficient – With 5400 RPM spin speed and 12 ms access time, even the most demanding customer will appreciate the performance achieved by WD Scorpio drives.

Quiet – In a notebook drive, silence is golden. WD’s exclusive WhisperDrive™ combines state-of-the-art seeking algorithms to yield one of the quietest 2.5-inch hard drives on the market. These algorithms also optimize the way a drive seeks for data, which significantly improves power consumption. So now silence (and longer battery life) is golden.

Reliable and Rugged – WD’s ShockGuard™ technology protects the drive mechanics and platter surfaces from shocks. WD’s SecurePark™ parks the recording heads off the disk surface during spin up, spin down and when the drive is off. This ensures the recording head never touches the disk surface resulting in improved long term reliability due to less head wear, and improved non- operational shock tolerance.

Tested for Compatibility – We perform tests on hundreds of systems and a multitude of platforms in our FIT Lab and Mobile Compatibility Lab to give our customers confidence that our drives will work in their systems.

Specifications

• Rotational Speed: 5,400 RPM (nominal)
• Buffer Size: 8 MB
• Average Latency: 5.50 ms (nominal)
  
  Seek Times
  
• Read Seek Time: 12.0 ms
• Track-To-Track Seek Time: 2.0 ms (average)
  
  Transfer Rates
  
• Buffer To Host (Serial ATA): 3 Gb/s (Max)
• Transfer Rate (Buffer To Disk): 850 Mbits/s (Max)
  
  Physical Specifications
  
• Formatted Capacity: 320,072 MB
• Capacity: 320 GB
• Interface: SATA 3 Gb/s
  
  Physical Dimensions
  
• Height: 0.374 Inches ±0.008 inch
• Length: 3.94 Inches ±0.010 inch
• Width: 2.75 ±0.010 inch
• Weight: 0.26 Pounds
  
  Environmental Specifications
  
  Acoustics
  
• Idle Mode: 24 dBA (average)
• Seek Mode: 0 26 dBA (average)
  
  Temperature (English)
  
• Operating: 41° F to 140° F
• Non-operating: -40° F to 149° F
  
  Temperature (Metric)
  
• Operating: 5° C to 60° C
• Non-operating: -40° C to 65° C
  
  Humidity
  
• Operating: 8-90% RH non-condensing
• Non-operating: 5-95% RH non-condensing
  
  Altitude (English)
  
• Operating: -1,000 feet to 10,000 feet
• Non-operating: -1,000 feet to 40,000 feet
  
  Vibration
  
• Operating: 0.00459 g²/Hz (10 to 500 Hz)
• Non-operating: 0.05102 g²/Hz (10 to 500 Hz)
  
  Electrical Specifications
  
  Current Requirements
  5 VDC
  
• Read/Write: 500 mA
• Idle: 400 mA
• Standby: 50 mA
• Sleep: 20 mA
  
  Power Dissipation
  
• Read/Write: 2.50 Watts
• Idle: 2.00 Watts
• Standby: 0.25 Watts
• Sleep: 0.10 Watts