Western Digital Scorpio Blue 320GB 5400rpm Internal SATA Hard Drive - 2.5"

Product code: 66594

Key Features

Massive capacity - Whether they are in an external drive or a notebook computer, WD Scorpio Blue SATA drives continue to offer the highest capacity for space-hungry operating systems with plenty of room left over for photos, music, and video. A slight increase in overall drive height (750 GB and 1 TB only) has driven storage capacity for 2.5-inch form factor drives upwards to a realm once thought to be impossible.*

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.

Fast and efficient - Ultra-fast 3 Gb/s SATA interface speed yields performance fit for demanding mobile applications.

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.
*750 GB and 1 TB models are 12.5 mm high and may not be compatible with all notebook systems. Consult system specifications for maximum allowable drive height before attempting to install.

Ideal For
Portable digital devices of all kinds including notebook computers, external storage, and digital media players.

Performance Specifications
Rotational Speed5,400 RPM (nominal)
Buffer Size8 MB
Average Latency5.50 ms (nominal)

Seek Times
Read Seek Time12.0 ms
Track-To-Track Seek Time2.0 ms (average)

Transfer Rates
Buffer To Host (Serial ATA)3 Gb/s (Max)

Physical Specifications
Formatted Capacity320,072 MB
Capacity320 GB
InterfaceSATA 3 Gb/s
User Sectors Per Drive625,142,448

Physical Dimensions
English
Height0.374 Inches
Length3.94 Inches
Width2.75 Inches
Weight0.26 Pounds
Metric
Height9.5 mm
Length100.2 mm
Width69.85 mm
Weight0.117 kg

Environmental Specifications
Acoustics
Idle Mode24 dBA (average)
Seek Mode 026 dBA (average)
Temperature (English)
Operating32 F to 140 F
Non-operating-40 F to 149 F
Temperature (Metric)
Operating-0 C to 60 C
Non-operating-40 C to 65 C
Humidity
Operating8% to 95% Non-condensing
Non-operating5-95% RH non-condensing
Altitude (English)
Operating-1,000 feet to 10,000 feet
Non-operating-1,000 feet to 40,000 feet
Altitude (Metric)
Operating-305M to 3,050M
Non-operating-305M to 12,200M
Vibration
Operating0.00459 g²/Hz (10 to 500 Hz)
Non-operating0.05102 g²/Hz (10 to 500 Hz)
Electrical Specifications
Current Requirements
5 VDC
Read/Write500 mA
Idle400 mA
Standby50 mA
Sleep20 mA
Power Dissipation
Read/Write2.50 Watts
Idle0.85 Watts
Standby0.25 Watts
Sleep0.10 Watts

As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, megabit per second (Mb/s) = one million bits per second, and gigabit per second (Gb/s) = one billion bits per second.