在此基础上，扼要分析了现有提高存储器存储密度的思路及关键技术，给出当前国际先进水平的技术指标。

The solutions for optical mass storage system and their principles are analyzed briefly, based on which, the key technologies for the improvement of the recording density are discussed.

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硬盘存储器的组成、原理与性能指标，活动硬盘，磁盘阵列；

The composition of hard disk memory, principle and function index, mobile hard disk, disk array;

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但要成为特性优良的通用型信息存储系统，就必须以可接受的误码率同时满足这些性能指标（计算机外存储器的基本要求是使用户误码率低于10 - 12 ） 。

But in order to make it a general-purpose data storage system, it is very important to attain these desirable goals simultaneously with the acceptable bit error rate (BER)(10 -12).

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