SDK Starts Shipments of 2.5-Inch 334 GB HD Media
Showa Denko K.K.
September 8, 2009
Showa Denko K.K. (SDK) has started commercial shipments of 2.5-inch hard disk (HD) media with storage capacity of 334 gigabytes per disk, using the fifth-generation perpendicular magnetic recording (PMR) technology.
To the best of our knowledge, our new 2.5-inch HD media have the world’s highest storage capacity for this size available on the market today. SDK has already commercialized 1.89-, 2.5-, and 3.5-inch fourth-generation PMR media.
Demand for high-capacity HD media is growing for such applications as PCs that enable storage/editing of moving pictures as well as HDD recorders that can record high-definition TV programs. SDK has established a setup for ensuring speedy and stable deliveries of best-quality, high-capacity HD media based on the PMR technology. SDK is making preparations for timely commercialization of its fifth-generation PMR media in other sizes.
SDK is developing world-leading technologies for HD media with higher capacity. As the world’s largest independent HD media supplier, SDK will continue meeting customer requirements in terms of quality as well as quantity.
[Reference]1. PMR technology
Compared with the conventional technology that stores magnetic data on a horizontal plane of the HD media, the PMR technology enables vertical magnetic recording, resulting in a dramatic increase in recording density.
2.The fourth- and fifth-generation PMR media
SDK's HD media based on the PMR technology are classified as shown in the table below according to respective storage capacities.
| Generation | 1.89-inch | 2.5-inch | 3.5-inch |
| 1 | 40 | 80 | 160 |
| 2 | 60 | 120 | 250 |
| 3 | 80 | 160 | 334 |
| 4 | 120 | 250 | 500 |
| 5 | (160) | 334 | (750) |
As for the products in parentheses, preparations are under way to start their commercial production.
For further information, contact:
IR & PR Office (Phone: 81-3-5470-3235)
