usb - 树莓派红灯

Question

我有一个 Raspberry Pi B+ 连接到外部 USB 磁盘，希捷可移植 1 Tb(无外部电源)。

一切正常，但是当磁盘正在写入/读取数据时，有时红灯(电源)会闪烁。但我没有任何断电或数据损坏。

我已经用 3 种不同的电源进行了测试:

1)一个通用的，闪烁(5V 3A)

2) 我的 Galaxy S4 (5V 2A) 原装充电器也是如此

3) 一个 Galaxy Tab 3 充电器 (5V 2A) 红灯常亮

由于三星原装充电器值得信赖，我认为我的外置高清耗电量太大？但如果这是真的，为什么 Raspberry 会继续运行而我没有损坏的数据？

红灯闪烁但一切正常是一个真正的问题吗？或者会在几周或几个月内损坏它？也许我需要考虑停止使用外部磁盘？

谢谢你。

Answer 1

根据 the wiki :

Red power LED is blinking
A blinking red power LED indicates problems with the power supply. On model A and B, it is hard-wired to the 3.3V power supply rail. If it is blinking, as one user has reported1 it means the 5V power supply is dropping out. Use a different power supply.

On model B+ (and presumably also the A+), the circuit has been improved to give a much more reliable warning of poor power quality. The red power LED is wired to an APX803 supervisor[2] which kicks in when the 5V power supply drops below 4.63V[3]. If it does, the LED will blink. Check your connections, cable, and power supply.