Toshiba on Monday released a 2.5-inch, double-platter hard disk drive that it said features the highest density yet of any such component.The disk uses perpendicular magnetic recording technology to hold 277.1 megabits per square millimeter, or 178.8 gigabits per square inch. This density surpasses the current record, which Toshiba also holds, at 133 gigabits per square inch. The drive itself is designed to hold 200GB. Mass production of the disks will begin in August, the company said.The new technology may play a role in Toshiba\u2019s planned digital audio player to be developed in conjunction with Microsoft and Japan\u2019s NTT DoCoMo for the Japanese market. \n\n\n\n\n\n\n\n\n\nToshiba 200GB HD DriveMicrosoft announced Friday it would work with Japanese partners to develop the device using a version of its Windows operating system, designed to take market share from Apple Computer\u2019s iPod. The company did not provide a target release date for the product.-Steven Schwankert, IDG News ServiceFor related news coverage, read Toshiba Picks HD-DVD for Laptop.Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.