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。

youdao

That is, 30-hour chunks of data (which may span 40 hours of clock time due to dropouts) which require a search of a spindown parameter as well as sky position. But nothing is set in stone.

也就是30小时的大段数据（由于含有无效信息可能会扩展到40小时），这与天区位置有关。

youdao