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首页> 外文会议>NATO Advanced Study Institute on Magnetic Storage Systems Beyond 2000, Jun 25-Jul 7, 2000, Rhodes, Greece >MODERN HARD DISK MEDIA ISSUES
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MODERN HARD DISK MEDIA ISSUES

机译：现代硬碟媒体问题

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For those of us who enjoyed the introduction of personal computers in the early 1980's the inclusion of a state of the art 5-megabyte hard disk drive represented a stunning improvement in computer performance. Only 20 years later, today's 10-gigabyte drives, which occupy only 1/100th the volume and sell for 1/4~* the price of these original drives, are commonly found in notebook computers. Since the first viable commercialization of magnetic recording tape in the 1930's and hard disk drives in the 1950's the annual areal density growth rate remained reasonably constant at about 25 to 30% per year. However, with the introduction of thin-film hard-disk media and magnetoresistive transducers in the early 1990's this growth rate increased to about 60% per year, equaling the pace of the growth of computational power of integrated circuits. However, for the past few years the annual growth rate of hard disk recording density has accelerated to over 100 percent per year. Hence, during 2000 we have observed product introductions utilizing 15 gigabits/in2 and multiple laboratory demonstrations in the 30 - 50 gigabits/in2 range. By the end of 2000 products will be available utilizing over 20 gigabit/in2. The technology, which has enabled this apparent revolution in data storage areal density, is based upon both a comprehensive body of accumulated knowledge and significant discoveries concerning materials, signal processing and device-processing technology. And yet, by both simple and extensive modeling, fundamental physical limits to the maximum achievable areal density have been predicted to be nearly at hand. These predicted limits are based upon basic energy and signal-to-noise arguments associated with the recording media and can only be circumvented if one understands the underlying assumptions and then designs around these issues. The purpose of this paper is to provide an overview of some of these issues, of the state of the art hard disk media technology and to propose methods of extending recording densities beyond these limits.
机译：对于那些在1980年代初喜欢引入个人计算机的人来说，最先进的5 MB硬盘驱动器代表了计算机性能的惊人提高。仅20年后，今天的10 GB驱动器仅占笔记本驱动器的1/100数量，价格仅为这些原始驱动器的1/4〜*。自从1930年代首次实现商业化的磁记录磁带和1950年代的硬盘驱动器首次商业化以来，年面密度增长率一直保持在每年约25％至30％的合理水平。但是，随着1990年代初期薄膜硬盘介质和磁阻传感器的引入，该增长率每年增加到约60％，这与集成电路计算能力的增长速度相当。但是，在过去几年中，硬盘记录密度的年增长率已加快到每年100％以上。因此，在2000年期间，我们已经观察到利用15吉比特/ in2的产品介绍以及30-50吉比特/ in2范围内的多个实验室演示。到2000年底，将可以使用超过20 Gb / in2的产品。这项技术使数据存储面密度发生了这场明显的革命，它既基于积累的综合知识，又涉及到有关材料，信号处理和设备处理技术的重大发现。然而，通过简单和广泛的建模，已经预测到了可达到的最大面密度的基本物理极限。这些预测的限制基于与记录媒体相关的基本能量和信噪比参数，并且只有在了解了基本假设然后围绕这些问题进行设计时，才可以绕开它们。本文的目的是概述其中一些问题，最新的硬盘介质技术，并提出将记录密度扩展到这些限制之外的方法。

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