I have a mycloud FR4100 having hard drive WD SATA 6TB 64Mb cache x 4 configured with RAID 5 with 4(four) hard drive and hard drive #4 having Red light . The power led is flashing red and the display reads Vol 1. Degraded see dashboard.
The NAS is configured with one RAID 5 volume and when I open the dashboard it goes to the RAID Profile screen which says that RAID Health is degraded. I did a manual rebuild and it still reports the volume as degraded and the Disk Status, all four drives report GOOD. I took a look at the S.M.A.R.T status, but I’m not certain what it is telling me. I need to do some more research, Essentially what I am trying to understand is which disk is going bad (I am assuming that some disk error is the root cause).
I’m a little surprised by this as this NAS and the drives are under a year old and they don’t get that much use. It is used to backup.
I pull out the hard disk #4 , and wait couple of minute, then insert in to the same location , and Rebuilt Manual Raid , it took time 2 to 3 hours to rebuilt , after that all is fine as previous, but still Red light on hard drive #4 , and same error “Raid Health Degraded”
Please reply with your expert opinion.