1. 这个特性是针对硬盘以及光盘驱动器的直接存储器访问(DMA，Direct Memory Access的缩写)来最大限度提升系统性能，因为现在个人计算机的最大瓶颈就是在磁盘的输入输出上。

This feature is for the hard disk and CD-ROM drive Direct Memory Access (DMA, Direct Memory Access acronym) to maximize system performance upgrade, because personal computers are now the biggest bottleneck is the disk input and output.

2. mnt是“mount”的缩写，是装入硬盘驱动器分区和其他设备的标准位置。

Mnt, short for " mount, " is the standard location to mount hard disk drive partitions and other devices.