通常提到硬盘性能参数时都从容量、平均寻道时间、转速、硬盘高速缓存、硬盘数据传输率等几个方面来考虑。其中,硬盘的数据传输率一般包括两个方面:一个是外部数据传输率;一个是内部数据传输率。一般对硬盘的外部数据传输率介绍比较多,而不太注意内部数据传输率。硬盘厂家一般都标明自己是ULTRADMA33硬盘,其指的就是外部数 Usually referred to when the hard drive performance parameters from capacity, average seek time, speed, hard disk cache, hard disk data transfer rate and other aspects to consider. Among them, the hard disk data transfer rate generally includes two aspects: one is the external data transfer rate; one is the internal data transfer rate. General introduction of the external hard disk data transfer rate more, and less attention to the internal data transfer rate. Hard disk manufacturers generally indicate that they are ULTRADMA33 hard drive, which refers to the external number