Architecture for Hard Disk Drives
Architecture for Hard Disk Drives
复制标题
硬盘驱动器架构
作者：
K. Gao
在过去的几十年里，磁性数据存储在面密度方面取得了迅速的进展。目前产品的面密度水平超过每平方英寸1012比特，大约是20世纪90年代中期面密度的1000倍。在过去的二十年里，五种组件技术已经成为硬盘驱动器的行业标准：基于巨磁电阻或隧道磁电阻的读磁头、垂直写磁头、垂直记录介质、加热器和接触检测传感器。在记录系统级别，所有磁盘驱动器公司都已经实现了带状磁记录，但由于访问时间（或延迟）的额外损失，它还没有成为一个新的标准。本文介绍了交错磁记录和闭塞磁记录，并与常规磁记录和瓦片磁记录进行了比较。
Magnetic data storage has made rapid progress in terms of areal density over the past few decades. Current products have areal density levels that exceed 1012 bits per square inch, about 1000 times greater than areal densities of the mid-1990s. Five component technologies have become hard-disk-drive industry standards over the past two decades: read heads based on giant magnetoresistance or tunneling magnetoresistance, perpendicular write heads, perpendicular recording media, heaters, and contact detection sensors. At the recording system level, shingled magnetic recording has been implemented by all disk-drive companies, but it has not become a new standard due to the additional penalty in access time (or latency). Here, interlaced magnetic recording and blocked magnetic recording are introduced and compared with conventional and shingled magnetic recording.