手头有两台 R4S ,其中一台两 USB 均能正确USB能挂载识别 U 盘,挂载 2.5寸 HDD 硬盘,另一台两 USB 能挂载识别 U 盘,但无法挂载 HDD 硬盘
有问题的机器挂载 HDD 硬盘 dmesg 显示错误信息如下
[ 96.337824] usb usb7-port1: Cannot enable. Maybe the USB cable is bad?
[ 97.297697] usb usb7-port1: Cannot enable. Maybe the USB cable is bad?
[ 97.298504] usb usb7-port1: attempt power cycle
[ 98.367883] usb usb7-port1: Cannot enable. Maybe the USB cable is bad?
[ 99.337823] usb usb7-port1: Cannot enable. Maybe the USB cable is bad?
[ 99.338653] usb usb7-port1: unable to enumerate USB device
由于有两台一样 R4S 4G版本,都使用同样的 SD 卡启动系统,所以可以排除是软件问题, 电源/网线/USB 线也都一样,唯一区别就是一台无法挂载 HDD 硬盘,请问是什么原因?