对应用程序透明：应用程序会将RAID作为一个整体，我的文本编辑器才不会关心它加载或者保存的文件是要读写多个磁盘的。
Transparent to the application: applications using the RAID as a single device. My text editor doesn't care that the file it is saving or loading is split across many disks.
在后台，代码为磁盘（在这里加载 LISP 翻译器）、读卡器（在这里读取作业）以及打印机（在这里产生输出）配置仿真器。
Under the covers, the code configures the simulator for the disk (where it loads the LISP interpreter), the card reader (where it reads the job), and the printer (where it emits the output).
执行器的作用是加载程序(将程序从磁盘中拷入内存之中)，并使计算机开始执行程序。
The role of the executor is to load the program (copy it from disk into memory) and make the computer start executing the program.
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