Unit is product number: WDBWWD0120KBK - 40
with 4 WD red drives in RAID 10 with two new 4TB (recent replacements in bays 1 & 2)) and two older 3TB (in bays 3 & 4). All indicators suggest system is healthy, except the solid RED LED over the power button. Drives have flashing blue.
There have been a couple of posts over 3 years ago that people experienced a solid red LED for the power. None have a “resolution” – like, whether the EX4 worked fine with red power LED, whether they replaced the power supply and it worked, whether it can be fixed.
I just had my power LED go from solid blue to solid red two days ago. I shut the system down, switched the outlet for the power supply (there are two on the upper left as you face the back). In the past month, I have had some storm-related power outages (mostly blinks, but enough to text me the power out error message). I don’t know if they are related, as we’ve had these and full power outages in the past and this unit has worked fine for 2.5 years. Electronics damage can be slow and cumulative though. It is plugged into a surge suppressor with 6k joules protection.
Should I buy a 2nd power supply? Is the power pathway inside the EX4 degraded?
Someone other than WD staff suggested that a solid red LED meant that a volume is nearing full capacity and this is a non-documented ‘feature.’
What is the right answer?