这些是设备白名单cgroup的指令，它协调由容器执行的设备创建、读和写。
These are directives to the devices whitelist cgroup which will mediate device creation, read, and write by the container.
读操作的数据必须结束或者截断，否则不能发送写指令。
Data from READ burst must be completed or truncated before a subsequent WRITE command can be issued.
每个被映射的页面都有读、写以及取指令(也叫执行)的限制。
Each mapped page is restricted in the types of operations that may be performed on its contents: read, write, and instruction fetch (also called execute).
用C51程序设置对于控制器的读、写状态的时序，从而实现对于控制器的写指令代码、写数据代码、清屏幕、屏幕滚动功能的操作。
C51 program has been set the schedule of reading and writing status for controller. It can work out some operations of writing instruction code, writing data code, clear screen and roll screen.
用来开启主轴电机转动，停转，寻道，读，写，始终读，始终写，读比较，睡眠，设置重试等等的指令。
Commands to spinup, spindown, seek, read, write, read long, write long, read compare, sleep, set retries, etc.
用来开启主轴电机转动，停转，寻道，读，写，始终读，始终写，读比较，睡眠，设置重试等等的指令。
Commands to spinup, spindown, seek, read, write, read long, write long, read compare, sleep, set retries, etc.
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