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从硬盘诞生到现在,存储容量的增长已超越著名的摩尔定律。世界上第一台硬盘是由50片直径为24英寸的磁盘组成的庞然大物,其5M的容量在当时可称得上超级硬盘。而今,对于笔记本电脑而言,连3.5英寸盘也让人难以忍受。 随着3D游戏风起云涌,PC对硬盘的容量和性能要求越来越高。3.5英寸硬盘单碟容量大都在4.3GB以上,6.5～8.4GB的存储量已成为基本配置。1999年,10GB甚至更大的硬盘将成为流行趋势,各大硬盘厂商纷纷推出十几到几十GB的大容量产品。硬盘单碟容量增大,加快了传输速率。在IDE接口方面,昆腾和Intel等共同发布的Ultra DMA/33接口标准,使IDE硬盘接口突发传输速率在不增加成本的情况下增加了近一倍,达到33.3MBps,且标准是不收费的,所以在一年内就被所有厂商采用。Intel和昆腾公司又于去年9月联合发布了下一代的接口技术Ultral ATA/66(Ultra DMA/66),使接口突发速率再次翻倍。这一规范将硬盘的最大外部传输率提高到66MBps,并引进了CRC(循环冗余校验)技术。66MBps的传输速率将有助于进一步提高硬盘和主内存之间的数据交换速度,而CRC技术是Ultra ATA/66规范中提出的一种数据保护方案,它极大地增强了数据的可靠性和完整性。目前,IBM公司已经发布了基于新规范的Deskstar25和Deskstar 22GXP大容量硬盘,昆腾
From the birth of the hard disk to now, the growth of storage capacity has surpassed the famous Moore’s Law. The world’s first hard drive is a monolith made up of 50 disks with a diameter of 24 inches. Its 5M capacity was then known as a super hard drive. Nowadays, even the 3.5-inch disk is unbearable for laptops. As 3D games surging, PC requirements for hard disk capacity and performance are getting higher and higher. 3.5-inch hard disk single platter capacity mostly in 4.3GB above, 6.5 ~ 8.4GB of storage capacity has become the basic configuration. In 1999, 10GB or even larger hard drive will become a trend, the major hard disk manufacturers have introduced a dozen to dozens of GB of high-capacity products. Increasing the capacity of the hard disk platter speeds up the transfer rate. In the IDE interface, Quantum and Intel co-released Ultra DMA / 33 interface standard, so that the IDE hard disk interface burst transfer rate without increasing the cost of nearly doubled to 33.3MBps, and the standard is free Therefore, it is adopted by all manufacturers within one year. Intel and Quantum co-released the Ultral ATA / 66 (Ultra DMA / 66), the next generation interface technology, last September to double interface burst rates again. This specification increases the maximum external hard drive transfer rate to 66MBps and introduces CRC (Cyclic Redundancy Check) technology. The 66MBps transfer rate will help further improve the data exchange between the hard disk and main memory, and CRC technology is a data protection scheme proposed in the Ultra ATA / 66 specification that greatly enhances the reliability and integrity of data Sex. Currently, IBM has released Deskstar25 and Deskstar 22GXP high-capacity hard drives based on the new specification, Quantum