Mobile PC HDDs offer environmentally friendly design.

Press Release Summary:

Featuring density of 308 GB/sq in. and 826.2 Mbps data transfer rate, 400 GB MK4058GSX incorporates acoustic techniques that make 5,400 rpm HDD nearly inaudible during seek operations. Model MKxx54GSY is 7,200 rpm drive, with capacity from 80-320 GB, that includes optimized firmware, caching algorithms, and 1,020 Mbps data throughput. Both feature 9.5 mm high package, have high operating and non-operating shock resistance, and exclude substances banned by RoHS directive.

Original Press Release:

Toshiba Expands 2.5 in. HDD Line with First Commercially Available 200 GB-per-Platter Product and New 7,200 rpm Family

Eco-Conscious HDDs Deliver Superior Performance and Highest Capacity for Holiday Season Mobile PCs

IRVINE, Calif., July 15 / / - Toshiba Storage Device Division (SDD), the pioneer in small form factor hard disk drives (HDDs), today announced the industry's first commercially available 200GB-per-platter 5,400 RPM HDD, which will provide the highest HDD capacity at 400GB for integration into mobile PCs for the holiday season. In addition, the company also introduced a new family of high-end 7,200 RPM HDDs, offering up to 320GB storage capacity and superior performance.

The standard 9.5-millimeter-high package of both HDDs fits existing product designs, enabling an easier migration path to high-capacity storage for portable PC, gaming and personal storage manufacturers catering to the diversified needs of mobile users in the digital age.

In addition to increasing areal density to 308 gigabits-per-square-inch, the 400GB MK4058GSX incorporates acoustic techniques that make the 5,400 RPM HDD nearly inaudible during seek operations. The large storage capacity and silent operation of the MK4058GSX are particularly suited for video and audio playback.

For optimum user experience in data-intensive applications such as image processing, video editing, multimedia and gaming, Toshiba's new 7,200 RPM, MKxx54GSY series delivers first-rate performance through a combination of factors, including optimized firmware, caching algorithms and fast data throughput of 1,020 megabits per second.

The MKxx54GSY provides a variety of capacity options ranging from 320 to 80GB. For added durability in mobile applications, free-fall sensor options also are available on the new HDD series.

Environmentally Conscious HDDs

Both the MK4058GSX and MKxx54GSY series reflect progress Toshiba has made toward its corporate initiative to enhance the environmental soundness of its products by discontinuing use of certain chemical substances and reducing carbon dioxide emissions during HDD operation. The company ceased use of the six substances banned by the European Union Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (RoHS) in all new products developed since April 2005, achieving full compliance with the RoHS Directive before the requirement came into effect in July 2006.

Focus on the elimination of toxic substances in halogenated flame retardants began in 2001 when Toshiba shipped HDDs with halogen-free printed circuit boards. The MK4058GSX takes this initiative further by discontinuing the usage of specified hazardous halogens and toxic chemicals such as polyvinyl chloride (PVC), antinomy trioxide and red phosphorus across all components incorporated in the drive.

Better Power and Temperature Performance vs. 3.5-inch HDDs

The eco-conscious MK4058GSX and MKxx54GSY also deliver lower power consumption and cooler operation than 3.5-inch HDDs at the same capacity points, offering PC manufacturers a solution to miniaturize designs with more environmentally sound storage alternatives. Power consumption during read and write operation can be reduced by as much as 70 percent over the most power-conservative 3.5-inch HDDs with both of Toshiba's new 2.5-inch HDDs.

"These introductions up the ante in capacity and performance as Toshiba remains focused on designing and developing innovative storage solutions to fuel the next generation of digital products for end users," said Maciek Brzeski, vice president of marketing at Toshiba Storage Device Division. "Beyond building storage products that are technically excellent based on our rich engineering heritage, we also continue to collaborate on a global basis to bring environmentally conscious products to market."

Information and Availability

Toshiba's new 7,200 RPM 2.5-inch HDD series will begin shipping to PC manufacturers in August, while the 400GB 5,400 RPM HDD will enter high-volume production by September for installation in products for the holiday shopping season. These new HDDs will be shown at the Intel Developer's Forum, August 19-21, in the Serial ATA International Organization booth. Interested developers and design engineers can visit for more information regarding Toshiba's line of industry-leading small form factor hard drives.

Product Specifications

Model Number MK4058GSX Series
Maximum Capacity (Formatted)(1) 400GB
Number of platters 2
Areal density 308 Gb/in2
Media transfer rate 826.2 Mbps
Average seek time 12 ms Read / 12 ms Write
Rotational speed 5,400 RPM
Buffer memory 8MB
Interface SATA 3.0Gb/s
(Serial ATA Revision 2.6, ATA-8)
Interface transfer rate 300 MB/sec
External dimensions (WxDxH; mm) 69.85mm x 100.0mm x 9.5mm
Weight (g) 102g (max)
Energy consumption efficiency 0.0015 W/GB
Shock resistance:
Operating 3,920 m/s2 (400G, 2ms)
Non-operating 8,820 m/s2 (900G, 1ms)
Acoustics Idle: 2.5 Bels
Operating: 2.5 Bels

Model Number MKxx54GSY Series
Maximum Capacity (Formatted)(1) 320GB, 250GB, 160GB, 120GB, 80GB
Number of platters 2, 2, 1, 1, 1
Areal density 247.1 Gb/in2
Media transfer rate 1,020 Mbps
Average seek time 10.5 ms Read / 12 ms Write
Rotational speed 7,200 RPM
Buffer memory 16MB
Interface SATA 3.0Gb/s
(Serial ATA Revision 2.6, ATA-8)
Interface transfer rate 300 MB/sec
External dimensions (WxDxH; mm) 69.85mm x 100.0mm x 9.5mm
Weight (g) 2-platter: 115g; 1-platter 111g (max)
Energy consumption efficiency 0.0028 W/GB, 0.0036W/GB, 0.0056W/GB,
0.0075W/GB, 0.0113W/GB
Shock resistance:
Operating 2,940 m/s2 (300G, 2ms)
Non-operating 8,820m/s2 (900G, 1ms)
Acoustics 2-platter: Idle: 2.5 Bels /
Operating: 2.8 Bels
1-platter: Idle: 2.0 Bels /
Operating: 2.5 Bels

About Toshiba Storage Device Division

Toshiba SDD, a division of Toshiba America Information Systems, Inc., leads the market in the development, design and manufacturing of small form factor 2.5-inch and 1.8-inch hard disk drives. Toshiba SDD markets high- quality peripherals to original equipment manufacturers, value-added resellers, value-added dealers, systems integrators, distributors and retailers in the United States. Inherent in the Toshiba storage family are the high-quality engineering and manufacturing capabilities that have established Toshiba products as worldwide leaders. For more information, visit

About Toshiba America Information Systems, Inc. (TAIS)

Headquartered in Irvine, Calif., TAIS is comprised of four business units: Digital Products Division, Imaging Systems Division, Storage Device Division and Telecommunication Systems Division. Together, these divisions provide mobile products and solutions, including industry-leading portable computers; projectors; imaging products for the security, medical and manufacturing markets; storage products for automotive, computer and consumer electronics applications; and telephony equipment and associated applications.

TAIS provides sales, marketing and services for its wide range of information products in the United States and Latin America. TAIS is an independent operating company owned by Toshiba America, Inc., a subsidiary of Toshiba Corporation, which is a global leader in high technology and integrated manufacturing of electrical and electronic components, products and systems, as well as major infrastructure systems. Toshiba has more than 198,000 employees worldwide and annual sales of surpassing U.S. $76 billion (FY2007). For more information on Toshiba's leading innovations, visit the company's Web site at

(C) 2008 Toshiba America Information Systems, Inc. All product, service and company names are trademarks, registered trademarks or service marks of their respective owners. Information including without limitation product prices, specifications, availability, content of services, and contact information is subject to change without notice.

(1) One Gigabyte (1 GB) means 10 to the ninth power = 1,000,000,000 bytes using powers of 10. A computer operating system, however, reports storage capacity using powers of 2 for the definition of 1 GB = 2 to the thirtieth power = 1,073,741,824 bytes, and therefore shows less storage capacity. Available storage capacity will also be less if the computer includes one or more pre-installed operating systems, pre-installed software applications or media content. Actual formatted capacity may vary.

Source: Toshiba Storage Device Division

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