5.对USB的操作
按照NED中对USB的操作要求是不能长时间将U盘留在USB接口上(Permanent connections of peripherals to the USB ports are not allowed.)U盘长时间插在USB接口上,可能引发SCSI线或SCSI接口板的故障,导致硬盘WDU读写错误,致使MML在执行时导致部分命令不能执行。另外,在取走U盘前必须先将UMS的状态改成BL 状态。(it is recommended that you change the working state of the USB memory stick to BL before removing it.)