Press Release Source: Western Digital Corp.

Wd(R) Ships 320 Gb Capacity 2.5-Inch Hard Drives for Notebooks and Portable Storage DevicesWednesday October 31, 8:01 am ET

WD's Continued Investments in Technology Result in Capacity Leadership for the Mobile Market

LAKE FOREST, Calif., Oct. 31 /PRNewswire-FirstCall/ -- Western Digital Corp. (NYSE: WDC - News) today announced it is now shipping its new WD Scorpio® 320 GB 2.5-inch SATA (Serial ATA) hard drives for notebook computers and portable storage devices.

WD uses advanced head and media technology to achieve the world's highest capacity 2.5-inch, slim, 9.5mm form-factor hard drive and includes proprietary features that make the drive extraordinarily quiet while running at cool operating temperatures. The WD Scorpio 320 GB hard drives deliver high performance with 3 Gb/s transfer rate and are destined for use in OEM notebook platforms that offer the highest storage capacities to the worldwide market.

"Consumer demands for high capacity storage are stronger than ever. WD is again leading the industry by delivering high quality, high capacity product to the market with the introduction of its new WD Scorpio 320 GB hard drive," said Campbell Kan, vice president of mobile computing business unit, Acer Inc. "WD understands the increasing storage requirements of the notebook market, allowing Acer to introduce high-capacity notebook solutions that meet our customer's ever-growing demands."

"In today's market, new notebook systems are increasingly targeting heavy duty applications in the office and home," said Jim Morris, WD's vice president and general manager of notebook storage. "As system manufacturers improve performance and add data hungry features, high-capacity hard drives become a key ingredient that allows users to fully benefit from the latest computing technologies."

The WD Scorpio 320 GB SATA hard drive is a direct result of the significant investments WD has made in proprietary head technologies. With the introduction of its latest-generation WD Scorpio drives, WD continues to offer mobile computing and portable storage customers the same outstanding quality, reliability and performance that have earned the company a leadership position in the desktop PC market.

The new WD Scorpio drive further expands the company's breadth of 2.5-inch, 5400 RPM, mobile hard drive offerings to capacity points up to 320 GB.

WD Scorpio Exclusive Features WhisperDrive(TM) -- WD's exclusive WhisperDrive technology combines state-of-the-art seeking algorithms to yield the WD Scorpio 320 GB as one of the quietest 5400 RPM, 2.5-inch drives available. ShockGuard(TM) -- Leading-edge ShockGuard technology combines firmware and hardware advancements to protect the drive mechanics and platter surface to meet the highest combined shock tolerance specifications required for mobile and notebook applications. IntelliSeek(TM) -- Another unique WD Scorpio 320 GB feature is its IntelliSeek technology, which calculates optimum seek speeds to lower power consumption, noise and vibration.

WD Scorpio delivers best-in-class performance with low power consumption and cool operation. In addition, you'll

get one of the quietest 2.5-inch drives on the market with real-time data protection technology to help keep your

data safe.

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.

Ideal For

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

Important interface information

This drive requires a SATA interface

[WD Interface Guide ]

Up to 91,000 digital photos

Up to 80,000 songs (MP3)

Up to 8,000 songs (uncompressed CD quality)

Up to 24 hours of Digital Video (DV)

Up to 100 hours of DVD quality video

Up to 38 hours of HD video

Performance Specifications

Rotational Speed 5,400 RPM (nominal)

Buffer Size 8 MB

Average Latency 4.20 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

English

Height 0.374 ±0.008 inch

Length 3.94 ±0.010 inch

Width 2.75 ±0.010 inch

Weight 0.26 Pounds

Metric

Height 9.5 ±0.20 mm

Length 100.2 ±0.25 mm

Width 69.85 ±0.25 mm

Weight 0.117 kg

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

Altitude (Metric)

Operating -305M to 3,050M

Non-operating -305M to 12,200M

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