I have a WD My Cloud EX4 with four WD 2TB Red drives. They are in a 3 drive RAID 5 with a hot standby drive. This config has been working perfectly with no problems for several years.
A couple days ago I noticed there was a solid red light over disk 1. Checking the web console it reported the RAID volume was ok, but disk 1 had “failed” or “faulted”. When I first bought the array, I had purchased an identical spare disk. It was sitting in the unopened box next to the array. I replaced the bad drive. It started an automatic build of the new drive into the array. Everything seemed to be working as expected.
But the red light didn’t go away.
The RAID volume reports healthy. Both disk tests, Quick and Full, report all drives good. I can access all volumes and files on the array. It appears healthy every way I look at it. Unless I look at the front of the unit, because there’s a big ol’ red light gleaming on the front of it.
Rebooting and shutting down cold and restarting, both give the same results. Perfectly healthy array with a red light on the front.
I have run multiple quick and full disk tests, and restarted it multiple times. That first disk light does start blue on restart, but very quickly turns red, apparently while the array is initializing.
So, 2 questions…
- Is there a way to really confirm that my drives are good? (red light makes me question the health)
- Is there a way to reset the red light to blue if it truly is a healthy drive?