新华网10月11日电 硬盘制造商们常为了扩大硬盘最大容量而绞尽脑汁。据美国科技博客Gizmodo报道，TDK公司近日采用了一种新技术，通过加热的方式提升硬盘容量，到2020年时，硬盘的最大容量可达40TB。
简单来说，当温度升高时，磁场更容易受到诱导和改变，而硬盘数据的读写正是通过这一原理实现的。因此，TDK公司开发了一种新型激光系统，能在硬盘读写数据时对其进行瞬时加温，从而使得硬盘上能够存储更多的数据。
据TDK公司表示，该技术的突破口是新型研发的激光系统—近场光发生器，它能够产生宽仅十几纳米的激光束，是读取蓝光光碟激光的十分之一。若激光束宽度再宽一些，便会有抹去硬盘数据的风险。
据悉，该技术很有可能将硬盘的发展提升到一个全新的水平线上。TDK公司也表示如果开发进展顺利，使用该技术的硬盘将会在2015年底问世。
译者：张免
百度新闻与新华网国际频道合作稿件，转载请注明出处。
Adding a Little Heat Could Give Us a 40 TB Hard Drive in a Few Years
When it comes to cramming as much data as possible on a platter, hard drive manufacturers will use every trick in the book to maximize capacity. Including turning up the heat as TDK plans to do with a new technique that could deliver 40 terabyte hard drives by 2020.
In layman"s terms, it"s actually easier to induce and reverse a magnetic field—which is how data is written and read in a hard drive—as the temperature increases. So TDK has developed a laser system to temporarily heat the area where data is being written, which in turn allows them to squeeze more bits onto a platter.
The breakthrough that made this new approach possible was the development of a laser, which TDK refers to as a near-field light generator, that creates a beam that"s just tens of nanometers wide—any larger and you risk erasing data around the area where it"s being written. And for comparison, that beam"s about 1/10 as wide as the lasers used to read a Blu-ray disk—so we"re talking seriously tiny.
The technology could very well be the next big leap needed to push hard drive capacities to the next level, and TDK is confident it could be implemented in commercial products as early as late 2015. (来源：新华国际)
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