Hard Disk Assembly
HARD DISK DRIVE GUIDEHow a Hard Disk Drive Works
Hard Disk Assembly
Last updated: 2/5/2002
The purpose of this article is to provide just the right balance of technical detail to convey a good insight into the innards of a hard disk drive and how if basically works without burdening the reader with excessive technical detail.
HARD DISK ASSEMBLY.A hard disk drive consists of a motor, spindle, platters, read/write heads, actuator, frame, air filter, and electronics.The frame mounts the mechanical parts of the drive and is sealed with a cover.The sealed part of the drive is known as the Hard Disk Assembly or HDA.The drive electronics usually consists of one or more printed circuit boards mounted on the bottom of the HDA.
A head and platter can be visualized as being similar to a record and playback head on an old phonograph, except the data structure of a hard disk is arranged into concentric circles instead of in a spiral as it on a phonograph record (and CD-ROM).A hard disk has one or more platters and each platter usually has a head on each of its sides.The platters in modern drives are made from glass or ceramic to avoid the unfavorable thermal characteristics of the aluminum platters found in older drives.A layer of magnetic material is deposited/sputtered on the surface of the platters and those in most of the drives I've dissected have shiny, chrome-like surfaces.The platters are mounted on the spindle which is turned by the drive motor.Most current IDE hard disk drives spin at 5,400, 7,200, or 10,000 RPM and 15,000 RPM drives are emerging.
[ 本帖最后由 wjsxy 于 2008-5-1 14:03 编辑 ] 看不懂，看看不错。中文的就好了。 英文的也能搞明白... 本文的目的是要提供公正的权利平衡的技术细节，转达了良好的洞察到内脏的硬盘驱动器，以及如何，基本上，如果工程没有的负担，读者与过度的技术细节。
硬盘大会。硬盘驱动器构成的电动机，主轴，盘，读/写磁头，驱动器，支架，空气过滤器，电子等。框架安装机械零件的驱动器和密封，是与掩护。密封部分的驱动器是被称为硬盘大会或hda的。驱动器的电子产品通常一个或多个印刷电路板安装在底部的hda的。
头部和磁盘可以可视化作为类似的记录和回放的头部一岁phonograph ，除了数据结构的硬盘是安排成同心圆，而是在一个螺旋，因为它在一个phonograph记录（和CD - ROM ） 。硬盘有一个或多个盘片和每盘通常有一个头部就其每一个方面。该盘在现代的驱动器是由玻璃或陶瓷，以避免不利的热特性的铝盘发现，在较旧的驱动器。一层磁性材料是交存/溅射表面上的盘片和那些在大多数的驱动器我已经解剖，有光泽，铬一样的表面。该盘是装在主轴是把由驱动马达。目前大部分的IDE硬盘驱动器转速为5400 ， 7200 ，或10000 RPM和15000 RPM硬盘正在出现。
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